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v7.4-rc1
10038 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
e823910506 |
First round of Kbuild fixes for 7.4
- Move probing of '-mfentry' back into Makefile instead of Kconfig because it does not interact well with toolchains that support multiple bit widths - Add a big comment in scripts/Kconfig.toolchain of two pitfalls when moving cc-option checks from Kbuild to Kconfig Signed-off-by: Nathan Chancellor <nathan@kernel.org> -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQR74yXHMTGczQHYypIdayaRccAalgUCauTsewAKCRAdayaRccAa lrzpAQCnAE03CslR2OH73sJezTz6DL+uSCxlwsxs7pwohD1NiwD/bEhV23ItB8zE c5VyQdrGgVt8zbswTm5WuO8uuBS75gE= =WRiy -----END PGP SIGNATURE----- Merge tag 'kbuild-fixes-7.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux Pull Kbuild fixes from Nathan Chancellor: - Move probing of '-mfentry' back into Makefile instead of Kconfig because it does not interact well with toolchains that support multiple bit widths - Add a big comment in scripts/Kconfig.toolchain of two pitfalls when moving cc-option checks from Kbuild to Kconfig * tag 'kbuild-fixes-7.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux: scripts/Kconfig.toolchain: Highlight cc-option differences between Kconfig and Kbuild kbuild: Move testing of '-mfentry' back to Makefile from Kconfig |
||
|
Linus Torvalds
|
8a36f53fd5 |
mm.git review status for linus..mm-stable
Everything:
Total patches: 213
Fixes: tags: 69
cc:stable patches: 43
Reviews/patch: 2.04
Reviewed rate: 86%
Excluding DAMON:
Total patches: 192
Fixes: tags: 63
cc:stable patches: 39
Reviews/patch: 2.18
Reviewed rate: 89%
Excluding DAMON and selftests:
Total patches: 182
Fixes: tags: 57
cc:stable patches: 39
Reviews/patch: 2.23
Reviewed rate: 89%
Summary of series in this merge:
- "mm: make VMA flag semantics explicit, eliminate VM_SPECIAL"
(Lorenzo Stoakes (ARM)):
Replace VM_SPECIAL with helpers describing mapping ownership and
behavior. Enforce the mmap flag rules and convert affected drivers,
removing ambiguous tests shared by driver mappings and ordinary memory.
- "support kselftest on nommu platform" (Hajime Tazaki):
Add opt-in mmap and mremap tests for NOMMU systems. Teach the runner to
avoid its fork-dependent timeout command and document the build and
runtime requirements.
- "mm/collapse: separate a collapse from its callers"
(Kiryl Shutsemau (Meta)):
Separate huge-page collapse from caller policy. Replace khugepaged
identity checks with explicit permissions, and separate scanning from
collapse with the mmap_lock drop in one place.
- "mm: implement and use vma_has_anon_rmap(), silence KCSAN"
(Lorenzo Stoakes (ARM)):
Provide a common helper for testing whether a VMA has anonymous reverse
mappings. Document the locking rules, annotate intentional concurrent
reads for KCSAN, and convert the core MM callers.
- "mm/sparse: remove SECTION_MARKED_PRESENT and further cleanups"
(David Hildenbrand (Arm)):
Remove SECTION_MARKED_PRESENT in favor of the early-section flag.
Simplify sparse memory initialization, section metadata handling and
related PFN validity checks.
- "sh: remove NUMA and SPARSEMEM support" (Mike Rapoport (Microsoft)):
Remove SuperH NUMA and SPARSEMEM support. The extra memory banks have
been unusable since the NO_BOOTMEM conversion, leaving only the code and
data overhead.
- "mm: Unify device DAX and HugeTLB vmemmap population paths"
(Muchun Song):
Unify the generic device DAX and HugeTLB vmemmap population paths and
shared tail-page handling. Remove the duplicate DAX machinery while
retaining the powerpc radix implementation.
- "kselftest: mm: fix some failure of split_huge_page_test" (Yeoreum Yun):
Fix huge-page split tests racing with khugepaged recollapse. Use pagemap
and page flags instead of VMA-boundary assumptions which fail when glibc
has already enabled THP.
- "memcg: move memcgid refcount to objcg to unpin dying memcgs"
(Bingfang Guo):
Let dying memcgs be freed while swapped-out shmem still holds their IDs.
Move ID references to reparentable objcgs, with the necessary swap
accounting and RCU lifetime changes.
- "mm/truncate: fix data loss when truncating straddling large folios"
(Zhang Yi):
Preserve out-of-range data when truncating straddling large folios. Fix
a lookup race and split-failure handling, and handle minimum folio orders
for the forthcoming ext4 iomap buffered I/O path.
- "mm/damon: introduce damos quota goal target metric complement flag"
(SJ Park):
Let DAMOS quota goals use a metric's complement, so utilization can also
express free-memory goals without adding separate metrics. Add the sysfs
interface, documentation and tests.
- "arm64/mm: Standardize printing for pgtable entries" (Anshuman Khandual):
Use the generic formatter for arm64 page-table entries, ready for future
wider entries. Move the safe-PTE-update check out of the header to avoid
an include cycle.
- "mm: kmsan: fix iounmap metadata teardown" (Dima Koziuk):
Fix KMSAN metadata leaks on iounmap and failed ioremap allocations. Free
backing pages before removing their mappings, and share the teardown with
partial-allocation cleanup.
- "mm/damon/core: preserve quota state when constructing schemes"
(Karl Mehltretter):
Preserve running DAMOS quota state while validating parameter updates.
Even rejected updates could reset accounting and exceed the quota window;
add tests for both accepted and rejected updates.
- "mm/vmalloc: fix vmalloc_dump_obj VA lookup" (Ye Liu):
Fix vmalloc_dump_obj() lookups for last-page addresses and allocations
spanning vmap zones. These allocations were being missed in diagnostic
output.
- "mm: various (urgent?) fixes" (David Hildenbrand (Arm)):
Fix mmap charge leaks and hugetlb use-after-free, wrong-address
unmapping, stuck locks and endless faults. Also preserve reservations on
failed mremap and handle stale userfaultfd bits.
- "maple_tree: fix maple_range_64 crashes in RCU mode" (Dimitris Charisis):
Fix pointer and metadata confusion during RCU destruction of
maple_range_64 nodes, avoiding double frees and invalid accesses. Add a
regression test; no in-tree user currently uses this combination.
- "mm: fix hugetlb NR_HUGETLB accounting on folio migration" (Hongfu Li):
Fix hugetlb migration and preallocation accounting so /proc/vmstat
retains the correct count and memory.numa_stat follows the folio to its
new node.
- "mm/damon: fix a minor bug, clean code, and add a test" (SJ Park):
Fix 32-bit DAMON age overflow which made old regions look young. Share
hugetlb folio acquisition code and add a regression test for the
previously fixed last-region skipping bug.
- "mm/damon/core: cleanup code, reduce stack usage, and add kunit"
(SJ Park):
Reduce kdamond stack usage and remove unused enums. Add deterministic
PSI quota-goal tests which do not depend on the machine's current memory
pressure.
- "mm/damon: fix the temporal goal tuner's size quota conversion"
(Donggeun Yoo):
Bound the temporal tuner's quota conversion to prevent overflow and zero
effective quotas, which could stop schemes making progress. Add boundary
tests.
- "Don't use GFP_DMA when calling dma_alloc_coherent" (Baoquan He):
Remove redundant GFP_DMA flags from coherent DMA allocation calls. The
DMA API already selects the zone from device limits and ignores the
caller's flag.
- "kselftest: mm: fix intermittent failure khugepaged test" (Yeoreum Yun):
Propagate child-process failures in the khugepaged tests and prevent
background collapse from racing their checks. This removes false passes
and intermittent failures.
- "MAINTAINERS: cover all hugetlb headers under HUGETLB SUBSYSTEM"
(Enze Li):
Cover all hugetlb headers in MAINTAINERS so get_maintainer.pl finds the
right maintainers. Also label the closing hugetlb_cgroup.h include
guard.
Summary of the 65 singletons in this merge:
The singletons include a few worthwhile performance fixes. Avoiding
unnecessary reverse-map tree updates gave a reported 15.9% improvement
in UnixBench's execl test on a 192-core x86 system. A reclaim retry fix
stops defrag_mode from spinning under memory.low protection; a reported
file-creation stress test ran 5.7 times faster, with far less memory
pressure. Narrower hugetlb invalidations also spare KVM guests needless
refaults: the reported Redis-in-VM P99 QPS penalty while punching holes
fell from 7.09% to 1.45%.
Several fixes prevent lost data or corrupted memory. Lazyfree huge-page
races with mremap()/munmap() could lose data or access freed memory, and
MADV_COLD could lose a concurrent write's dirty bit. Another fix
prevents stale migration entries from outliving large folios. On
filesystems with blocks smaller than a page, extending a file by 4 GiB
or more could expose bytes written past the old EOF through mmap instead
of zeroes. That is fixed, along with use-after-free races in
PAGEMAP_SCAN during process exit and in memory-cgroup accounting on
PREEMPT_RT kernels.
Other fixes stop UFFDIO_MOVE spinning forever on pinned large folios,
which could wedge other memory operations, and stop mremap() leaking
commit charges until allocations fail under strict overcommit. A further
fix keeps userfaultfd tracking intact on neighboring mappings. NUMA
binding no longer prevents long-term pins when the chosen node has only
movable memory, fixing QEMU/VFIO startup and io_uring buffer
registration failures. MGLRU also gets a fix for early-boot crashes with
memory cgroups disabled at boot, notably in small crash kernels.
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Merge tag 'mm-stable-2026-10-25-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull more MM updates from Andrew Morton:
- "mm: make VMA flag semantics explicit, eliminate VM_SPECIAL" (Lorenzo
Stoakes):
Replace VM_SPECIAL with helpers describing mapping ownership and
behavior. Enforce the mmap flag rules and convert affected drivers,
removing ambiguous tests shared by driver mappings and ordinary
memory.
- "support kselftest on nommu platform" (Hajime Tazaki):
Add opt-in mmap and mremap tests for NOMMU systems. Teach the runner
to avoid its fork-dependent timeout command and document the build
and runtime requirements.
- "mm/collapse: separate a collapse from its callers" (Kiryl
Shutsemau):
Separate huge-page collapse from caller policy. Replace khugepaged
identity checks with explicit permissions, and separate scanning from
collapse with the mmap_lock drop in one place.
- "mm: implement and use vma_has_anon_rmap(), silence KCSAN" (Lorenzo
Stoakes):
Provide a common helper for testing whether a VMA has anonymous
reverse mappings. Document the locking rules, annotate intentional
concurrent reads for KCSAN, and convert the core MM callers.
- "mm/sparse: remove SECTION_MARKED_PRESENT and further cleanups"
(David Hildenbrand):
Remove SECTION_MARKED_PRESENT in favor of the early-section flag.
Simplify sparse memory initialization, section metadata handling and
related PFN validity checks.
- "sh: remove NUMA and SPARSEMEM support" (Mike Rapoport):
Remove SuperH NUMA and SPARSEMEM support. The extra memory banks have
been unusable since the NO_BOOTMEM conversion, leaving only the code
and data overhead.
- "mm: Unify device DAX and HugeTLB vmemmap population paths" (Muchun
Song):
Unify the generic device DAX and HugeTLB vmemmap population paths and
shared tail-page handling. Remove the duplicate DAX machinery while
retaining the powerpc radix implementation.
- "kselftest: mm: fix some failure of split_huge_page_test" (Yeoreum
Yun):
Fix huge-page split tests racing with khugepaged recollapse. Use
pagemap and page flags instead of VMA-boundary assumptions which fail
when glibc has already enabled THP.
- "memcg: move memcgid refcount to objcg to unpin dying memcgs"
(Bingfang Guo):
Let dying memcgs be freed while swapped-out shmem still holds their
IDs. Move ID references to reparentable objcgs, with the necessary
swap accounting and RCU lifetime changes.
- "mm/truncate: fix data loss when truncating straddling large folios"
(Zhang Yi):
Preserve out-of-range data when truncating straddling large folios.
Fix a lookup race and split-failure handling, and handle minimum
folio orders for the forthcoming ext4 iomap buffered I/O path.
- "mm/damon: introduce damos quota goal target metric complement flag"
(SJ Park):
Let DAMOS quota goals use a metric's complement, so utilization can
also express free-memory goals without adding separate metrics. Add
the sysfs interface, documentation and tests.
- "arm64/mm: Standardize printing for pgtable entries" (Anshuman
Khandual):
Use the generic formatter for arm64 page-table entries, ready for
future wider entries. Move the safe-PTE-update check out of the
header to avoid an include cycle.
- "mm: kmsan: fix iounmap metadata teardown" (Dima Koziuk):
Fix KMSAN metadata leaks on iounmap and failed ioremap allocations.
Free backing pages before removing their mappings, and share the
teardown with partial-allocation cleanup.
- "mm/damon/core: preserve quota state when constructing schemes" (Karl
Mehltretter):
Preserve running DAMOS quota state while validating parameter
updates. Even rejected updates could reset accounting and exceed the
quota window; add tests for both accepted and rejected updates.
- "mm/vmalloc: fix vmalloc_dump_obj VA lookup" (Ye Liu):
Fix vmalloc_dump_obj() lookups for last-page addresses and
allocations spanning vmap zones. These allocations were being missed
in diagnostic output.
- "mm: various (urgent?) fixes" (David Hildenbrand):
Fix mmap charge leaks and hugetlb use-after-free, wrong-address
unmapping, stuck locks and endless faults. Also preserve reservations
on failed mremap and handle stale userfaultfd bits.
- "maple_tree: fix maple_range_64 crashes in RCU mode" (Dimitris
Charisis):
Fix pointer and metadata confusion during RCU destruction of
maple_range_64 nodes, avoiding double frees and invalid accesses. Add
a regression test; no in-tree user currently uses this combination.
- "mm: fix hugetlb NR_HUGETLB accounting on folio migration" (Hongfu
Li):
Fix hugetlb migration and preallocation accounting so /proc/vmstat
retains the correct count and memory.numa_stat follows the folio to
its new node.
- "mm/damon: fix a minor bug, clean code, and add a test" (SJ Park):
Fix 32-bit DAMON age overflow which made old regions look young.
Share hugetlb folio acquisition code and add a regression test for
the previously fixed last-region skipping bug.
- "mm/damon/core: cleanup code, reduce stack usage, and add kunit" (SJ
Park):
Reduce kdamond stack usage and remove unused enums. Add deterministic
PSI quota-goal tests which do not depend on the machine's current
memory pressure.
- "mm/damon: fix the temporal goal tuner's size quota conversion"
(Donggeun Yoo):
Bound the temporal tuner's quota conversion to prevent overflow and
zero effective quotas, which could stop schemes making progress. Add
boundary tests.
- "Don't use GFP_DMA when calling dma_alloc_coherent" (Baoquan He):
Remove redundant GFP_DMA flags from coherent DMA allocation calls.
The DMA API already selects the zone from device limits and ignores
the caller's flag.
- "kselftest: mm: fix intermittent failure khugepaged test" (Yeoreum
Yun):
Propagate child-process failures in the khugepaged tests and prevent
background collapse from racing their checks. This removes false
passes and intermittent failures.
- "MAINTAINERS: cover all hugetlb headers under HUGETLB SUBSYSTEM"
(Enze Li):
Cover all hugetlb headers in MAINTAINERS so get_maintainer.pl finds
the right maintainers. Also label the closing hugetlb_cgroup.h
include guard.
Summary of the 65 singletons in this merge:
The singletons include a few worthwhile performance fixes. Avoiding
unnecessary reverse-map tree updates gave a reported 15.9% improvement
in UnixBench's execl test on a 192-core x86 system. A reclaim retry
fix stops defrag_mode from spinning under memory.low protection; a
reported file-creation stress test ran 5.7 times faster, with far less
memory pressure. Narrower hugetlb invalidations also spare KVM guests
needless refaults: the reported Redis-in-VM P99 QPS penalty while
punching holes fell from 7.09% to 1.45%.
Several fixes prevent lost data or corrupted memory. Lazyfree
huge-page races with mremap()/munmap() could lose data or access freed
memory, and MADV_COLD could lose a concurrent write's dirty bit.
Another fix prevents stale migration entries from outliving large
folios. On filesystems with blocks smaller than a page, extending a
file by 4 GiB or more could expose bytes written past the old EOF
through mmap instead of zeroes. That is fixed, along with
use-after-free races in PAGEMAP_SCAN during process exit and in
memory-cgroup accounting on PREEMPT_RT kernels.
Other fixes stop UFFDIO_MOVE spinning forever on pinned large folios,
which could wedge other memory operations, and stop mremap() leaking
commit charges until allocations fail under strict overcommit. A
further fix keeps userfaultfd tracking intact on neighboring mappings.
NUMA binding no longer prevents long-term pins when the chosen node
has only movable memory, fixing QEMU/VFIO startup and io_uring buffer
registration failures. MGLRU also gets a fix for early-boot crashes
with memory cgroups disabled at boot, notably in small crash kernels.
* tag 'mm-stable-2026-10-25-19-27' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (213 commits)
mm: multi-gen LRU: fix NULL lruvec->pgdat deref with memcg disabled on cmdline
mm/page_counter: use WRITE_ONCE() for emin/elow when parent is the root
mm/memcontrol: publish null pointer before dropping css reference
test_maple_tree: test maple_range_64 node in RCU mode
maple_tree: fix maple_range_64 crashes in RCU mode
mm/vma: avoid broken uffd merge on mremap
tools/testing/shared: catch a failed posix_memalign()
mm/damon/core: remove unreachable damos charge_{target,addr}_from
mm/shrinker: allocate shrinker_info_unit from a dedicated kmem_cache
riscv: mm: exclude invalid THP PMDs from page table check
mm/damon/core: filter out damos address filter-split failed region
fs/proc/task_mmu: pin mm_users in do_pagemap_scan()
mm/mempolicy: apply bind policies against the scoped allocation zone
mm/vmscan: reclaim every zone in per-node proactive reclaim
mm/mremap: correctly uncharge accountable VMAs in error path
mm/mremap: populate calculated fields in vrm state correctly
MAINTAINERS: add an entry for MEMORY MANAGEMENT - MEMORY MAP
mm: bdi: reset min_ratio after the sysfs attributes are gone
mm/page_vma_mapped: continue past nonmatching huge PMDs
selftests/mm: skip hugetlb cgroup v2 tests without the needed controllers
...
|
||
|
Linus Torvalds
|
7d1f84f1b9 |
mm.git review status for linus..mm-nonmm-stable
Total patches: 134 Fixes: tags: 86 cc:stable patches: 52 Reviews/patch: 0.73 Reviewed rate: 59% Summary of patch series in this merge: - "ocfs2: exit recovery thread on mount error path" (Joseph Qi): Stop OCFS2 recovery before freeing failed-mount state and replay slots, closing use-after-free and double-free races. Defer suballocator reclaim to break a transaction-lock deadlock with dismount. - "ocfs2: validate suballoc slot and bit of metadata blocks" (Joseph Qi): Validate OCFS2 metadata suballocator slots, bits and directory index block locations. Reject corrupt metadata with filesystem errors instead of BUGs or out-of-bounds accesses. - "ocfs2: deal with legacy signed name hash values" (Joseph Qi): Restore OCFS2 lookups for non-ASCII names stored with legacy signed hashes. Use stored xattr hashes during bucket splits to avoid duplicate entries and spurious ENOSPC failures. - "ocfs2: stabilize dentry names in file and setattr traces" (Cen Zhang): Snapshot OCFS2 names during file and setattr tracing to prevent rename races using freed storage or mismatched names and lengths. Preserve trace formats and the locked release open-count sample. - "panic: fix panic_force_cpu= redirect races and NMI bypass" (Bradley Morgan): Fix panic_force_cpu races and NMI redirection so crash-kernel CPU selection is honored. Preserve variable arguments on failed redirects and use a static message buffer. - "fat: allocate multiple clusters in fallocate" (Matheus Alves de Almeida): Allocate FAT clusters in batches for FALLOC_FL_KEEP_SIZE and batch FAT updates. This removes repeated single-cluster allocation overhead, particularly on synchronous mounts. - "scripts/gdb: fix radix tree lookup and stack depot diagnostic" (Ting-Han Hou): Fix GDB radix-tree lookup and its handling of XArray sibling, retry and zero entries. Also repair the stack-depot diagnostic for an out-of-range pool index. - "hung_task: Improve warning budget handling and task reporting" (Aaron Tomlin): Reset the hung-task warning budget after recovery so later hangs remain visible. Keep the configured limit intact and emit one summary per scan when detailed reports exhaust the budget. - "bootconfig: Reject unexpected data after null character and cleanups" (Masami Hiramatsu (Google)): Reject bootconfig data after an embedded null while accepting trailing padding. Validate the full input in the userspace tool, and retain internal tree sanity checks there rather than in the kernel. - "kbuild: GCOV cleanups following the prefer-atomic fix" (Konstantin Khorenko): Use the actual GCOV build flags in the prefer-atomic compiler probe. Move flag setup into scripts/Makefile.gcov and skip the probe when GCOV is disabled. - "ocfs2: xattr bucket validation fixes" (Joseph Qi): Accept valid OCFS2 xattr buckets spanning 512-byte blocks, avoiding false read-only remounts. Reject misaligned buckets and return errors instead of panicking on corrupt defrag metadata. - "ocfs2: fix metadata reservation for xattr value trees" (Joseph Qi): Reserve enough OCFS2 metadata for new and relocated xattr value trees. Fix shortfalls which could cause ENOSPC, dropped entries and leaked clusters on fragmented filesystems; remove duplicate reservations. - "Introduce arch_do_panic" (Mete Durlu): Add arch_do_panic() and move s390 and sparc handling out of generic panic code. The architecture-specific actions now follow the end-of-panic marker. - "checkpatch: userspace improvements" (Petr Vorel): Improve checkpatch's userspace detection and suppress kernel-only checks. Recognize standard inttypes macros and add explicit --userspace and --no-userspace overrides. - "ocfs2: validate dr_fs_generation of dir index root blocks" (Joseph Qi): Check OCFS2 directory index generations and leaf block numbers. Reject stale or misplaced blocks instead of using metadata left by a previously formatted filesystem. - "selftests/membarrier: Skip an unregistered memory barrier test on Musl" (Chris Gellermann): Skip the unregistered membarrier test when libc has already registered the command. Musl does this during thread creation, causing false failures in the multithreaded test. - "init: fix array boundary bugs in boot parameter parsing" (Wilson Felipe Pereira): Fix boot argument boundary cases which leave stale arguments in init's command line or panic when replacing the final environment variable. Clear the last slot and check duplicates before the limit. Summary of the 87 singletons in this merge: The OCFS2 singletons fix deadlocks between xattr updates and inline truncation, and during inode reclaim. Corrupt quota and extent metadata could also crash the kernel or corrupt memory; these paths now check the layout before using it. Other fixes close use-after-free and publication races around cluster reconfiguration, node failure, quota remount errors and shared refcount trees. New files now retain security labels from all stacked LSMs instead of silently dropping all but one. Valid xattr insertions also stop tripping FORTIFY on builds with counted arrays. Elsewhere, a lost wakeup could leave hardware-monitoring reads stuck in unkillable sleep and block further I2C traffic. That is fixed, as are kernel memory leaks in POSIX message-queue notifications and tmpfs casefold setup which could grow until memory is exhausted. A driver removal race which could crash the kernel is fixed too. The hibernation command through reboot() also stops taking the same mutex twice, avoiding a deadlock before suspension. On the boot side, bzip2 decoding now accepts valid full blocks emitted by lbzip2, fixing failures to boot those compressed kernels. Malformed bzip2 streams can no longer overflow the decode buffer, and LZ4 initrds are checked before the decoder can read past their end. FAT rejects geometry which overflows the data-area calculation on 32-bit systems, and rolls back entries when inode setup fails, preventing failed creations from reappearing after remount. The x86 XOR and RAID6 AVX paths also avoid imposing a slowdown on subsequent SSE code. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCat57YgAKCRDdBJ7gKXxA jofGAQDBRlA6AI/WIWAuSb9FH4RIMe16EU3klIYoNqgY3eMbLwD/f8J1rm4gBpBl eXV7nwZMb8Ackw1+2CuBtbvpLfjQUA4= =JLjf -----END PGP SIGNATURE----- Merge tag 'mm-nonmm-stable-2026-10-25-14-57' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull non-MM updates from Andrew Morton: - "ocfs2: exit recovery thread on mount error path" (Joseph Qi): Stop OCFS2 recovery before freeing failed-mount state and replay slots, closing use-after-free and double-free races. Defer suballocator reclaim to break a transaction-lock deadlock with dismount. - "ocfs2: validate suballoc slot and bit of metadata blocks" (Joseph Qi): Validate OCFS2 metadata suballocator slots, bits and directory index block locations. Reject corrupt metadata with filesystem errors instead of BUGs or out-of-bounds accesses. - "ocfs2: deal with legacy signed name hash values" (Joseph Qi): Restore OCFS2 lookups for non-ASCII names stored with legacy signed hashes. Use stored xattr hashes during bucket splits to avoid duplicate entries and spurious ENOSPC failures. - "ocfs2: stabilize dentry names in file and setattr traces" (Cen Zhang): Snapshot OCFS2 names during file and setattr tracing to prevent rename races using freed storage or mismatched names and lengths. Preserve trace formats and the locked release open-count sample. - "panic: fix panic_force_cpu= redirect races and NMI bypass" (Bradley Morgan): Fix panic_force_cpu races and NMI redirection so crash-kernel CPU selection is honored. Preserve variable arguments on failed redirects and use a static message buffer. - "fat: allocate multiple clusters in fallocate" (Matheus Alves de Almeida): Allocate FAT clusters in batches for FALLOC_FL_KEEP_SIZE and batch FAT updates. This removes repeated single-cluster allocation overhead, particularly on synchronous mounts. - "scripts/gdb: fix radix tree lookup and stack depot diagnostic" (Ting-Han Hou): Fix GDB radix-tree lookup and its handling of XArray sibling, retry and zero entries. Also repair the stack-depot diagnostic for an out-of-range pool index. - "hung_task: Improve warning budget handling and task reporting" (Aaron Tomlin): Reset the hung-task warning budget after recovery so later hangs remain visible. Keep the configured limit intact and emit one summary per scan when detailed reports exhaust the budget. - "bootconfig: Reject unexpected data after null character and cleanups" (Masami Hiramatsu): Reject bootconfig data after an embedded null while accepting trailing padding. Validate the full input in the userspace tool, and retain internal tree sanity checks there rather than in the kernel. - "kbuild: GCOV cleanups following the prefer-atomic fix" (Konstantin Khorenko): Use the actual GCOV build flags in the prefer-atomic compiler probe. Move flag setup into scripts/Makefile.gcov and skip the probe when GCOV is disabled. - "ocfs2: xattr bucket validation fixes" (Joseph Qi): Accept valid OCFS2 xattr buckets spanning 512-byte blocks, avoiding false read-only remounts. Reject misaligned buckets and return errors instead of panicking on corrupt defrag metadata. - "ocfs2: fix metadata reservation for xattr value trees" (Joseph Qi): Reserve enough OCFS2 metadata for new and relocated xattr value trees. Fix shortfalls which could cause ENOSPC, dropped entries and leaked clusters on fragmented filesystems; remove duplicate reservations. - "Introduce arch_do_panic" (Mete Durlu): Add arch_do_panic() and move s390 and sparc handling out of generic panic code. The architecture-specific actions now follow the end-of-panic marker. - "checkpatch: userspace improvements" (Petr Vorel): Improve checkpatch's userspace detection and suppress kernel-only checks. Recognize standard inttypes macros and add explicit --userspace and --no-userspace overrides. - "ocfs2: validate dr_fs_generation of dir index root blocks" (Joseph Qi): Check OCFS2 directory index generations and leaf block numbers. Reject stale or misplaced blocks instead of using metadata left by a previously formatted filesystem. - "selftests/membarrier: Skip an unregistered memory barrier test on Musl" (Chris Gellermann): Skip the unregistered membarrier test when libc has already registered the command. Musl does this during thread creation, causing false failures in the multithreaded test. - "init: fix array boundary bugs in boot parameter parsing" (Wilson Felipe Pereira): Fix boot argument boundary cases which leave stale arguments in init's command line or panic when replacing the final environment variable. Clear the last slot and check duplicates before the limit. Summary of the 87 singletons in this merge: The OCFS2 singletons fix deadlocks between xattr updates and inline truncation, and during inode reclaim. Corrupt quota and extent metadata could also crash the kernel or corrupt memory; these paths now check the layout before using it. Other fixes close use-after-free and publication races around cluster reconfiguration, node failure, quota remount errors and shared refcount trees. New files now retain security labels from all stacked LSMs instead of silently dropping all but one. Valid xattr insertions also stop tripping FORTIFY on builds with counted arrays. Elsewhere, a lost wakeup could leave hardware-monitoring reads stuck in unkillable sleep and block further I2C traffic. That is fixed, as are kernel memory leaks in POSIX message-queue notifications and tmpfs casefold setup which could grow until memory is exhausted. A driver removal race which could crash the kernel is fixed too. The hibernation command through reboot() also stops taking the same mutex twice, avoiding a deadlock before suspension. On the boot side, bzip2 decoding now accepts valid full blocks emitted by lbzip2, fixing failures to boot those compressed kernels. Malformed bzip2 streams can no longer overflow the decode buffer, and LZ4 initrds are checked before the decoder can read past their end. FAT rejects geometry which overflows the data-area calculation on 32-bit systems, and rolls back entries when inode setup fails, preventing failed creations from reappearing after remount. The x86 XOR and RAID6 AVX paths also avoid imposing a slowdown on subsequent SSE code. * tag 'mm-nonmm-stable-2026-10-25-14-57' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (134 commits) scripts/gdb: fix stack depot out-of-bounds diagnostic scripts/gdb: fix radix tree lookup pointer handling ocfs2/cluster: remove zero-address nodes from IP tree on teardown ocfs2: snapshot the dentry name while tracing file release ocfs2: snapshot dentry names in file and setattr traces ocfs2/dlm: drain join handlers before releasing module text MAINTAINERS: update Markus's e-mail address mailmap: add entries for Andrew Jones stackdepot: stop preallocating after the final pool ocfs2: drain quorum work before removing the cluster watchdog: force console verbose when reporting lockups profiling: fix sampling step on 64-bit big-endian systems kernel/reboot: avoid potential deadlocks during suspension compat: avoid double rounding in times() ocfs2: pin owning modules for open debugfs files ocfs2/cluster: initialize heartbeat regions before publishing them selftests/proc: proc-pid-vm: fix unused variable warning on non-x86 ocfs2: pin refcount trees before dropping the lookup lock ocfs2: validate the xattr tree root of an indexed xattr block ocfs2/dlm: hold the lookup reference across convert AST enqueue ... |
||
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Linus Torvalds
|
21a7f44fd0 |
Devicetree updates for v7.4:
- A bunch of improvements in dt-check-style. Fix various bindings based on these additional checks. - Convert hisilicon,hix5hd2-ir, hisilicon,hi6220-ade, hisilicon,hi6220-dsi, hisilicon,hip05-sas-v1, MediaTek RT5650 codecs, mediatek,g3dsys, mediatek,mt2701-scpsys, ti,omap-mpu, and ti,omap-ocp2scp to DT schema format - Add schemas for ST STM32MP2 DWC3 xHCI USB, ST STM32MP25 USB2-FEMTO PHY, spacemit,k1-gpu and spacemit,k3-gpu, HiSilicon local bus, HiSilicon HIP05 CPLD, SDMC DM2016, and QCom SM7250 and Kuno PDC - Various binding updates to fix schema warnings in .dts files - Drop obsolete .txt bindings for STM32(MP1) RCC, VExpress hwmon and regulator, and mailbox.txt - Remove the unused of_overlay_remove_all() function - Fixes for of_check_msi_parent() - Add "i2c-parent" tracking to fw_devlink -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEktVUI4SxYhzZyEuo+vtdtY28YcMFAmraMloACgkQ+vtdtY28 YcP2kRAAnVdBRN/J4rdDu8iAC/WfwH04Zb+Fn+nKf+wN+5zXFf3JjMu/Kyu9syxW DdEjyb2ZmiH5VYOnx4iFxqnjS7zl7o6nfook/WLLKwSMvNSofvQuvfsfHf2YZLLN 54mgNsgK7p9cNHOUqIlHpJCRQwm8NBmcudArNfH0gZBBEQdZbt/mL4jIypKxFt8f xQNkimzOC/XZFw5swMAGL1qs646yKyAK7rDXFn7Aj0Zyg4e5B/xJN6coKBkKcMUF I+PjnQTgvNLQYOKdHJLjuWSA7akh5pICPLZW3R9nkGsvyPejVRqLVusTk33spjan pKW8Yq3m9JKFF086o2GuRabV878pGGUIp14uTxCEgXipZWRC3/DmQlF+JekQCWvH Pov/Aw9fMjX2BR0TR21fBwD66oED7hI78DOKKbTcFZKL25QVXmaJXjhPPXl4x5aH CqhUkGEgpchtS5waZU33sr9TX/afDf8LkiV7e9ullyQyT/cjrBwJwYaqAVDERcyb lF94XJZwklnUTYcPakjySPsU6vgLgphfye/I7Tx+xsCx8gnkz2a1Za4UaZycyg6/ 374usLDFF60h4J8FzHvwrTekWjms9jy0UuOoBud5zsQjntUxcgBxiNvQjF1Rp0Ws iDXfj6TM+8ba0N5uafY9bzWDbCo34xs8KpwVwYyxE54XUrv6GB8= =kxPa -----END PGP SIGNATURE----- Merge tag 'devicetree-for-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux Pull devicetree updates from Rob Herring: - A bunch of improvements in dt-check-style. Fix various bindings based on these additional checks. - Convert hisilicon,hix5hd2-ir, hisilicon,hi6220-ade, hisilicon,hi6220-dsi, hisilicon,hip05-sas-v1, MediaTek RT5650 codecs, mediatek,g3dsys, mediatek,mt2701-scpsys, ti,omap-mpu, and ti,omap-ocp2scp to DT schema format - Add schemas for ST STM32MP2 DWC3 xHCI USB, ST STM32MP25 USB2-FEMTO PHY, spacemit,k1-gpu and spacemit,k3-gpu, HiSilicon local bus, HiSilicon HIP05 CPLD, SDMC DM2016, and QCom SM7250 and Kuno PDC - Various binding updates to fix schema warnings in .dts files - Drop obsolete .txt bindings for STM32(MP1) RCC, VExpress hwmon and regulator, and mailbox.txt - Remove the unused of_overlay_remove_all() function - Fixes for of_check_msi_parent() - Add "i2c-parent" tracking to fw_devlink * tag 'devicetree-for-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (72 commits) dt-bindings: usb: dwc3: Document ST STM32MP2 DWC3 xHCI USB controller dt-bindings: iommu: Describe MT8195 infra IRQs dt-bindings: clock: mediatek: Add MT8516 fallbacks dt-bindings: media: Convert hisilicon,hix5hd2-ir to DT schema dt-bindings: display: Convert hisilicon,hi6220-ade to DT schema dt-bindings: display: Convert hisilicon,hi6220-dsi to DT schema dt-bindings: phy: Document ST STM32MP25 USB2-FEMTO PHY of: overlay: remove unused of_overlay_remove_all() dt-bindings: power: Convert mediatek,mt2701-scpsys to DT schema dt-bindings: bus: Add HiSilicon local bus dt-bindings: gpu: img,powervr-rogue: add spacemit,k1-gpu and spacemit,k3-gpu dt-bindings: interrupt-controller: qcom,pdc: Document SM7250 PDC dt-bindings: vendor-prefixes: add Ambarella dt-bindings: reset: Drop obsolete STM32(MP1) RCC bindings dt-bindings: arm: keystone: ti,sci: Correct reg and mboxes constraints dt-bindings: ASoC: Convert MediaTek RT5650 codecs bindings to DT schema dt-bindings: scsi: Convert hisilicon,hip05-sas-v1 to DT schema of/irq: Stop the MSI walk at the first msi-parent of/irq: Fix device node refcount leak in of_check_msi_parent() dt-bindings: display: faraday,tve200: Use a level-high interrupt ... |
||
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David Hildenbrand (Arm)
|
4d42b10363 |
scripts/gdb: mm.py: remove fallbacks for SECTION_HAS_MEM_MAP and SECTION_IS_EARLY
There is no reason to handle the absence of the corresponding BIT values. So let's remove the fallbacks. Link: https://lore.kernel.org/20260921-b4-sparsemem_cleanups-v2-9-54d81d65e125@kernel.org Link: https://lore.kernel.org/r/vpz5zqg5nwbpolxbkip45vxxdt3lni7j2haal7q42skc3b57tu@uh4cec4x32dq Signed-off-by: David Hildenbrand (Arm) <david@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Seongjun Hong <hsj0512@snu.ac.kr> Cc: Lorenzo Stoakes <ljs@kernel.org> Cc: Liam R. Howlett <liam@infradead.org> Cc: Vlastimil Babka <vbabka@kernel.org> Cc: Mike Rapoport <rppt@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Kairui Song <kasong@tencent.com> Cc: Qi Zheng <qi.zheng@linux.dev> Cc: Shakeel Butt <shakeel.butt@linux.dev> Cc: Barry Song <baohua@kernel.org> Cc: Axel Rasmussen <axelrasmussen@google.com> Cc: Yuanchu Xie <yuanchu@google.com> Cc: Wei Xu <weixugc@google.com> Cc: Baoquan He <baoquan.he@linux.dev> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Brendan Jackman <brendan.jackman@linux.dev> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Zi Yan <ziy@nvidia.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Oscar Salvador <osalvador@suse.de> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Rafael J. Wysocki <rafael@kernel.org> Cc: Danilo Krummrich <dakr@kernel.org> |
||
|
Ting-Han Hou
|
b6232ca8d1 |
scripts/gdb: fix stack depot out-of-bounds diagnostic
The pool_index field was renamed to pool_index_plus_1, but the
out-of-bounds diagnostic in stack_depot_fetch() still accesses the old
field. Looking up a handle whose pool index is outside stack_pools
therefore raises "There is no member named pool_index" instead of printing
the diagnostic and returning an empty result.
Use the already decoded pool_index variable in the diagnostic.
Link: https://lore.kernel.org/20261011023044.1722-3-ue081723@gmail.com
Fixes:
|
||
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Ting-Han Hou
|
66d190b072 |
scripts/gdb: fix radix tree lookup pointer handling
Patch series "scripts/gdb: fix radix tree lookup and stack depot
diagnostic", v2.
Two scripts/gdb fixes.
Patch 1 fixes $lx_radix_tree_lookup(), which dereferenced slot contents
as if they were node pointers. v2 also handles the XArray sibling,
retry and zero entries that Sashiko pointed out: they carry the
internal tag but are not node pointers, and the v1 patch raised a GDB
MemoryError on them. Large folios in the page cache make sibling
entries common, so this was worth fixing rather than documenting.
Patch 2 is unchanged from v1 apart from being resent with git
send-email, since the earlier copy was word-wrapped by the mail
client. Sorry about that.
Both patches are tested against standalone GCC-built fixtures that use
the kernel struct layouts (details below the --- line of each patch),
not against a running kernel.
This patch (of 2):
lookup() casts each slot to a pointer to a node pointer and then
dereferences it. Since the slot already contains an entry pointer,
this reads the entry's contents as another pointer instead of
returning the entry itself. Internal entries also keep their tag
bits when descending, so multi-level trees are read from the wrong
address and $lx_radix_tree_lookup() fails with a memory error.
Sibling, retry and zero entries carry the same internal tag but are
small integers rather than node pointers, so the tag alone must not
decide whether to descend. A page cache populated with large folios
has a sibling entry in every slot but the first of each folio.
Walk the tree the way xas_load() does: descend only through entries
that xa_is_node() would accept, follow sibling entries to the
canonical slot of a multi-index entry, and treat retry and zero
entries like empty slots since they hold no data. Remove the explicit
shift counter, as traversal now follows the entry type.
Link: https://lore.kernel.org/20261011023044.1722-1-ue081723@gmail.com
Link: https://lore.kernel.org/20261011023044.1722-2-ue081723@gmail.com
Fixes:
|
||
|
Linus Torvalds
|
55fbedcec6 |
bpf-next-7.4
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Merge tag 'bpf-next-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
Pull bpf updates from Alexei Starovoitov:
"Major changes:
- Introduce scalar evolution (SCEV) analysis in the verifier.
It infers how registers and stack slots change in a loop and lets
the verifier check bounded loops with induction variables as ranges
instead of walking every iteration. The number of processed insns
drops ten fold in programs with loops (Eduard Zingerman)
- Add 'callx' instruction: indirect call of a static BPF subprogram.
The address is taken with ld_imm64 or loaded from read-only data.
Supported by x86-64, arm64 and riscv64 JITs (Alexei Starovoitov, Pu
Lehui)
- Add unwind_goto and unwind_exit instructions, so that Rust panic or
C++ exception can run destructors of every frame it passes through.
The normal path is free of unwind code. Supported by x86-64 and
arm64 JITs (Alexei Starovoitov)
- Support programs compiled by rust-bpf: treat load and store through
a number as arena access with BPF_F_ARENA_SCALAR, accept rust names
in BTF (Alexei Starovoitov)
- Raise BPF program stack size from 512 bytes to 2 KiB on x86-64 and
arm64 (Kumar Kartikeya Dwivedi)
- Support struct, union and __int128 up to 16 bytes passed and
returned by value in BPF subprograms and kfuncs, and fix x86-64 and
arm64 trampolines for such arguments (Yonghong Song)
- Introduce a common way to attach struct_ops to a cgroup via
bpf_link. bpf_tcp_ops is the first user and mirrors TCP sock_ops
callbacks (Martin KaFai Lau, Amery Hung)
- Describe inlined functions in BTF. New kinds tell where the inline
sites are and how to fetch the arguments there.
CONFIG_DEBUG_INFO_BTF_INLINE keeps it apart from the main BTF in
.BTF.inline section or in btf_vmlinux_inline.ko (Alan Maguire)
- Fix many memory safety, lifetime and locking bugs in BPF core,
verifier, iterators, local storage, dynptr, devmap, cpumap and
seg6local (Josef Bacik, Alexei Starovoitov)
- Diff stat is dominated by selftests and by removal of
lib/test_bpf.c. Its 16k lines of instruction tests were converted
to BPF selftests that BPF CI runs on every architecture it covers
(Daniel Borkmann)
Other features and fixes:
- Add KASAN checks to memory accesses of JITed programs on x86-64
(Alexis Lothoré)
- Complete unification of helper, kfunc and subprog argument checks
in the verifier (Amery Hung)
- Add bpf_copy_from_user_mm[_str]() kfuncs (Anastasios Papagiannis)
- Various features and fixes (Daniel Borkmann):
- Add .bpf keyring for program signature verification, modelled
after dm-verity keyring, and support ML-DSA in signing tools
- Emit shorter and faster code in x86-64 JIT for patterns that
LLVM generates
- Fix various issues in gotox handling
- Let BPF LSM set xattrs at inode creation with bpf_inode_init_xattr()
(David Windsor, Daniel Borkmann)
- Use sleepable page allocation in sleepable arena paths. Fix races
between arena free, allocation and user page fault (Emil Tsalapatis)
- Switch BPF crypto from lskcipher to AES-CBC and AES-ECB libraries
(Eric Biggers)
- Add bpf_proactive_reclaim() kfunc (Hui Zhu)
- Render decl_tags in libbpf btf_dump and add tests for bpftool C
dump (Ihor Solodrai)
- Speed up tracing_multi attach on x86 (Jiri Olsa)
- Various features and fixes (Kumar Kartikeya Dwivedi):
- Add BPF_PROG_STREAM_OPEN command to read BPF streams through a
file descriptor with poll support
- Let kernel structs publish arena pointers with __arena type tag
- Fix __uninit kfunc output buffers and fastcall rewrite with
indirect stack accesses
- Refuse CO-RE relocations for signed programs
- Add enqueue_rcvq and dequeue_rcvq hooks to bpf_tcp_ops to adjust
sk_rcvlowat and avoid unnecessary wakeups (Kuniyuki Iwashima)
- Add bpf_ksock_sendto() kfunc and allow ksock connect and send from
bpf_wq (Mahe Tardy)
- Fix racy plt target update in arm64 bpf_arch_text_poke()
(Matthew Wood)
- Restructure BPF selftests Makefile as a layered build
(Mykola Lysenko)
- Speed up hash map lookups for u32 and u64 keys (Mykyta Yatsenko)
- Add signed div/mod, movsx, bswap and gotol to MIPS JITs, signed
div/mod to parisc JITs (Nicholas Dudar, Johan Almbladh)
- Fix stack overflow in build ID parser on 32-bit (Nickolai
Zeldovich)
- Add stack arguments, signed arena loads and gotox to riscv64 JIT.
Pu Lehui is now co-maintainer of riscv BPF JITs (Pu Lehui, Chen
Pei, Feng Jiang)
- Add bpf_call_rcu() and bpf_call_rcu_tasks_trace() kfuncs. Support
fetching and/or/xor atomics in arena on x86-64 (Puranjay Mohan)
- Fix flaky selftests, selftests with clang 23 and bpf-gcc
(Qiliang Yuan, KaFai Wan, Vineet Gupta)
- Fix builds broken by fatal resolve_btfids warnings, BTF generation
on ARC, and define arch_cmpxchg_local() on arc, hexagon and
openrisc (Sasha Levin)
- Reduce memory use of hash maps by up to 50% per element
(T.J. Mercier)
- Mark pointer fields of sched_ext ops arguments as trusted (Tejun
Heo)
- Remove legacy bpf_asm, bpf_dbg and bpf_jit_disasm tools (Xia Yan)
- Fix index overflow in queue and stack maps, arena range tree after
allocation failure, tail call loop after freplace detach, lost
signal in bpf_send_signal() (Yuan Chen)
- Many more fixes and cleanups"
* tag 'bpf-next-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (660 commits)
selftests/bpf: Time tc_edt from its first packet with data
selftests/bpf: Test unwind_exit of an exception callback
selftests/bpf: Tests for 32-bit scalar evolution bounds computation
bpf: Reject unwind_goto and unwind_exit in offloaded progs
bpf: Support 32-bit linear scalar evolution
bpf: Make unwind_exit of an exception callback exit in JITs
selftests/bpf: Test forbidden bpf_ksock_sendto() LSM attach
selftests/bpf: Test ksock sendto()
bpf: Add bpf_ksock_sendto() kfunc
selftests/bpf: Test unwinding from R0: R2 subprog
selftests/bpf: Add a C++ prog with exceptions
selftests/bpf: Add tests for unwind_goto and unwind_exit
bpf, arm64: Support unwind_goto and unwind_exit
bpf, x86: Support unwind_goto and unwind_exit
bpf: Add unwind_goto and unwind_exit insns
tools/bpf: Remove legacy BPF tools
bpf: Annotate data races on bpf_lru_node type
selftests/bpf: Add arena allocation race tests
bpf: Fix arena race between page free and alloc leading to incoherency
bpf: Revalidate faulted arena pages before installing user mappings
...
|
||
|
Linus Torvalds
|
c0e8d30137 |
Modules changes for 7.4-rc1
- Ignore local labels and mapping symbols during module load These symbols were already ignored during kallsyms address-to-symbol lookups. Filter them out earlier during module loading to reduce lookup overhead and prevent them from appearing in /proc/kallsyms. - Fix potentially incorrect access of SetOnce<T> when setting Rust module parameters. - Fix a potential read of an uninitialized count when printing taint information for unloaded modules. - Allocate the kmod argument array using kmalloc_array() in preparation for conversion to type-aware allocators. - Clean up includes in linux/kmod.h Add explicit includes of linux/umh.h to files that use usermode helpers. Then clean up the #include list in linux/kmod.h, notably removing the compatibility linux/umh.h include. - Remove the error-injection.h include from linux/module.h Add explicit includes of linux/error-injection.h to files that use the ALLOW_ERROR_INJECTION() macro and currently rely on it being provided indirectly via linux/module.h. Then remove the unnecessary linux/error-injection.h include from linux/module.h. - Replace __MODULE_STRING() with __stringify() in various drivers in preparation for removing the former macro. The changes to several #include lists have been reported to cause trivial conflicts in linux-next with the drm, drm-xe, and usb trees. -----BEGIN PGP SIGNATURE----- iQFkBAABCABOFiEEIduBR9MnFA82q/jtumpXJwqY6poFAmrWJvAbFIAAAAAABAAO bWFudTIsMi41KzEuMTIsMiwyFBxwZXRyLnBhdmx1QHN1c2UuY29tAAoJELpqVycK mOqalOYH/RpwszqX+OuRhf3G9IDokSZFZyiAJLZan3H7jZNb9VBVLYmTTRYF/UE4 uXKeGAUXZOaUdhVjQi/1LqX3NbDO1NfUCM9sbk3EPal0L6ILbcmkBecXu9JXHxvB 6sfEAdTMdAn28613wcnbjmdGfEkgHuDZqZeld4dIAtZ+GvLzFz0D+o0zkigCnT4I faKU9GLIHJe2Cn5FB40b1+M+IGY9t6bl2+WxVc1rd9oSZXfr8ptE7NPllhiOmOhD /aMVpeSlXzo8DYxIhvtZGwDh5NrJglPFdFRXYuHUDLxkWCCFtXRt//LtWv3EpKqp dgQUH5QAO5E/+OuycHFLaXOUiKVS0P4= =bCLk -----END PGP SIGNATURE----- Merge tag 'modules-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux Pull module updates from Petr Pavlu: - Ignore local labels and mapping symbols during module load These symbols were already ignored during kallsyms address-to-symbol lookups. Filter them out earlier during module loading to reduce lookup overhead and prevent them from appearing in /proc/kallsyms. - Fix potentially incorrect access of SetOnce<T> when setting Rust module parameters. - Fix a potential read of an uninitialized count when printing taint information for unloaded modules. - Allocate the kmod argument array using kmalloc_array() in preparation for conversion to type-aware allocators. - Clean up includes in linux/kmod.h Add explicit includes of linux/umh.h to files that use usermode helpers. Then clean up the #include list in linux/kmod.h, notably removing the compatibility linux/umh.h include. - Remove the error-injection.h include from linux/module.h Add explicit includes of linux/error-injection.h to files that use the ALLOW_ERROR_INJECTION() macro and currently rely on it being provided indirectly via linux/module.h. Then remove the unnecessary linux/error-injection.h include from linux/module.h. - Replace __MODULE_STRING() with __stringify() in various drivers in preparation for removing the former macro. * tag 'modules-7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux: drivers: Replace __MODULE_STRING() with __stringify() module: Fix uninitialized count read of unloaded taint tracking record rust: module_param: Fix potentially incorrect access of `SetOnce<T>` module: Remove the error-injection.h include from linux/module.h drm/xe: Include error-injection.h for ALLOW_ERROR_INJECTION() drm/i915: Include error-injection.h for ALLOW_ERROR_INJECTION() syscalls: Include error-injection.h for ALLOW_ERROR_INJECTION() net: Include error-injection.h for ALLOW_ERROR_INJECTION() block: Include error-injection.h for ALLOW_ERROR_INJECTION() module: Bring includes in linux/kmod.h up to date time/jiffies: Include linux/sysctl.h for proc_int_u2k_conv_uop(), ... umh, treewide: Explicitly include linux/umh.h where needed modules/kmod: Allocate argv with kmalloc_array() module/kallsyms: Ignore local labels and mapping symbols during module load module/kallsyms: Refactor current symbol filtering into is_core_symbol() module/kallsyms: Rename is_mapping_symbol() to is_ignored_kernel_symbol() |
||
|
Linus Torvalds
|
c5fd5e67c7 |
mm.git review status for linus..mm-stable
Everything:
Total patches: 539
Fixes: tags: 101
cc:stable patches: 67
Reviews/patch: 1.62
Reviewed rate: 76%
Excluding DAMON:
Total patches: 407
Fixes: tags: 84
cc:stable patches: 44
Reviews/patch: 2.00
Reviewed rate: 87%
Excluding DAMON and selftests:
Total patches: 360
Fixes: tags: 78
cc:stable patches: 44
Reviews/patch: 2.02
Reviewed rate: 89%
Summary of patch series in this merge, ordered by descending size:
- "selftests/mm: improve khugepaged coverage" (Kiryl Shutsemau (Meta)):
Give khugepaged a proper workout. Extend the tests to all supported mTHP
orders, check exactly which windows collapsed, and make scan completion
deterministic. Race collapse against faults, pinning, fork and remap;
verify that the contents survive.
Add coverage for whole-page-table zaps and memory pressure too.
- "selftests/mm: separate GUP microbenchmarking from functional testing"
(Sarthak Sharma):
Untangle GUP benchmarking from correctness testing. Move the benchmark
into tools/mm, add a standalone harness-based GUP selftest, and move shared
helpers into tools/lib/mm. Give each tool one job instead of mixing timing
measurements with correctness checks.
Cover the mapping, pinning and batch-size combinations explicitly.
- "mm: Switch device DAX to section-based vmemmap optimization" (Muchun Song):
Apply section-based vmemmap optimization to device DAX. Rework the backing
metadata layout to save memory while preserving the handling of device
memory hotplug and its different alignment and lifetime requirements.
- "mm: Introduce section-based vmemmap optimization for HugeTLB" (Muchun
Song):
Cut the memory consumed by HugeTLB's struct page array with section-based
vmemmap optimization. Arrange the metadata so large huge pages need fewer
backing pages, while keeping initialization, teardown and the various
hugepage configurations straight.
- "mm/huge_memory: clean up and decouple the anon and file split helpers"
(Kairui Song):
Separate anonymous and file-backed folio splitting, which have rather
different locking and bookkeeping requirements. Move the work into
separate helpers, drop dead checks and tidy swap-cache handling. Fix error
paths, including one that could leave a folio frozen.
Keep the swap cache cases separate from file-cache splitting.
- "mm: Unconditional per-VMA locks and cleanups" (Dave Hansen):
Make per-VMA locking unconditional and clean up the old conditional code
around it. This removes configuration-dependent plumbing and lets callers
depend on one locking model rather than carrying both cases along.
- "memcg: remove the v1 soft limit" (Shakeel Butt):
Remove the old cgroup v1 memory soft-limit machinery. This has long since
been superseded by the newer memory-control interfaces; hauling around a
separate reclaim scheme for it no longer buys us much.
- "read proc/pid/smaps_rollup under per-vma lock" (Suren Baghdasaryan):
Read /proc/PID/smaps_rollup using per-VMA locks where possible, rather than
holding mmap_lock across the entire walk. Retain the contention fallback
and add tearing tests. This considerably reduces latency when another
thread is busy changing its mappings.
- "mm/damon: introduce data access-as-a-data attribute" (SJ Park):
Teach DAMON to expose memory access observations as data attributes, making
them available to the probe and filtering machinery. Extend the
interfaces, documentation and tests so the new information can be used
rather than merely collected.
- "Remove PG_private by using page/folio->private checks instead" (Zi Yan):
Get rid of PG_private and use the folio's private pointer to say whether
private data is attached. Convert the filesystem users, including erofs,
f2fs and md, and clean up the old accessors and flags. There are a few
special cases, notably swapcache and hugetlb, which need explicit care.
- "mm: make userland page table freeing RCU-safe" (Lorenzo Stoakes (ARM)):
Make freeing userspace page tables safe against RCU readers. Sort out the
page-table lifetime and locking rules so walkers cannot stumble over freed
tables while mappings are being torn down.
- "make unused huge shrinker memcg aware" (Qi Zheng):
Make shmem's unused-huge-folio shrinker aware of memory cgroups, so reclaim
can find those folios under the right memcg. Wire up the per-memcg
tracking and its lifetime rules, and give the shrinklist its own lockdep
class to avoid spurious dependency reports.
- "mm: Drop pxd_ERROR()" (Anshuman Khandual):
Remove the old pxd_ERROR() page-table checks and their
architecture-specific baggage. Simplify the common page-table interfaces
and callers now that these checks no longer serve a useful purpose.
- "memcg: group struct fields by access pattern" (Shakeel Butt):
Rearrange memcg's hot and cold fields according to how they're actually
accessed. Keep frequently updated counters and their neighboring state
from fighting over cachelines and reduce needless cacheline traffic.
- "mm/damon/core: fix the size charged for a filter-trimmed region" (Donggeun
Yoo):
Fix DAMOS quota accounting when a filter trims a monitoring region. Charge
only the part left after filtering, not the original region, and add KUnit
coverage. Previously the excluded memory could eat into the quota and make
schemes run more slowly than requested.
- "mm/damon: add kunit and selftests for probes and probe weights" (SJ Park):
Add more tests for DAMON probes and their weights, including validation and
the results reported to userspace. This is mostly about catching
regressions in the newer probe infrastructure before they become harder to
diagnose.
- "mm: memcontrol: constify the read side of the read side of the memcg API"
(Tal Zussman):
Mark the read-only parts of the memcg interface const, from folio and
lruvec accessors to counters and swap helpers. Most of this is mechanical,
but it makes the contracts clearer and lets the compiler catch accidental
writes.
- "mm/damon/vaddr: support {prep,apply}_probes" (SJ Park):
Support the new prepare/apply probe operations in DAMON's virtual-address
backend. This brings vaddr monitoring into line with the probe
infrastructure and makes the added probe types useful there too.
- "mm/mglru: clean up folio counters and flag usage" (Kairui Song):
Simplify MGLRU's folio counters and flag handling. Remove redundant
accounting paths and make the state transitions easier to follow without
changing the intended reclaim policy.
- "arch, mm/execmem: resolve confusion about set_direct_map_valid_noflush()"
(Mike Rapoport (Microsoft)):
Clarify and straighten out the set_direct_map_valid_noflush() interface
across architectures and execmem. Make the requested mapping changes and
the callers' expectations agree, rather than relying on subtly different
architecture behavior.
- "mm: zswap: free cold writeback folios promptly" (Alexandre Ghiti):
Free zswap writeback folios as soon as their disk write completes. They
are cold temporary buffers, so putting them on the LRU only makes reclaim
rediscover them later. Extend swap-cache dropbehind and let zswap keep
these folios off the LRU altogether.
- "mm: gup: cleanup gup_fast call chain" (Aristeu Rozanski):
Clean up the GUP-fast call chain and simplify how the fast-path helpers
pass their arguments and results around. Keep the page-pin behavior the
same while making the call sequence easier to maintain.
- "mm: optimize zone-device memmap initialization" (Li Zhe):
Speed up initialization of zone-device struct pages. Avoid redundant work
when setting up large device-memory ranges, where touching every descriptor
can get expensive.
- "mm/zswap: shrink zswap_entry via a pool id" (Jianyue Wu):
Reduce the size of zswap_entry by storing a compact pool identifier instead
of a full pointer. Keep the pool lookup and lifetime handling correct
while saving per-entry metadata.
- "mm/damon: support access monitoring of hugetlb-backed memory" (Krishna
Iyer):
Let DAMON monitor hugetlb-backed memory too. Extend the relevant access
checks and add coverage so those mappings no longer fall through a hole in
the monitoring machinery.
- "mm/execmem: fixes and cleanups for the ROX cache" (Mike Rapoport
(Microsoft)):
Tidy execmem's read-only-executable cache and fix its handling of the
awkward allocation and release cases. The aim is to make the cache's
ownership and permission transitions more predictable.
- "zsmallc: remove old object read API" (Sergey Senozhatsky):
Drop zsmalloc's old object-read API and move its remaining users to the
supported access mechanism. This removes a duplicate interface which we no
longer need.
- "mm/mempolicy: stop copying state in the interleave paths" (Gregory Price):
Stop copying mempolicy state in the interleave paths when a reference to
the existing policy will do. This avoids extra work and makes the
ownership rules less obscure.
- "mm/mglru: speed up inc_min_seq() and fix cold/hot inversions" (Barry Song
(Xiaomi)):
Make MGLRU's generation advancement cheaper and fix cases where cold and
hot folios end up in the wrong order. Adjust the counter and list handling
so reclaim doesn't keep passing over the better eviction candidates.
- "mm: Fix MF_DELAYED handling on memory failure" (Lisa Wang):
Treat MF_DELAYED as a partially completed memory-failure operation, not an
outright failure. Propagate that result correctly through shmem and the
generic handler, fix the extra-reference accounting, and add tests for the
resulting SIGBUS behavior.
- "tools/mm/page_owner_sort: fix --sort, add module filter, improve usage" (Ye
Liu):
Fix page_owner_sort's --sort handling, add module-based filtering and make
the usage output more helpful. This makes the tool less frustrating when
tracking down who is holding on to pages.
- "mm/damon: move damos filter range arguments validation to core" (SJ Park):
Move DAMOS filter range validation into the core, where all callers can
share it. Also close the sysfs read-twice races which could pass
inconsistent ranges, and add tests for invalid input.
- "mm/damon: misc cleanups" (Zenghui Yu (Huawei)):
Clean up a collection of small DAMON rough edges in the core, interfaces
and tests. No large behavior change here, just simpler code and fewer
opportunities for confusion.
- "mm/damon: cleanup code, add test cases, and update guidances in docs" (SJ
Park):
Clean up DAMON's core and interfaces, add missing test cases and bring the
documentation into line with the code. These changes should make the newer
facilities easier to understand and maintain.
- "mm/damon: introduce hugepage_size probe filter" (SJ Park):
Add a DAMON probe filter for hugepage size. Let users select a range of
folio sizes through sysfs, validate the range and document the new
interface, so monitoring can concentrate on memory backed by the desired
hugepage sizes.
- "selftests/mm: pagemap_ioctl test fixes and cleanups" (Zenghui Yu (Huawei)):
Fix some pagemap ioctl test assumptions and clean up their setup and
reporting. Make failures point to the operation that went wrong rather
than to test harness bookkeeping.
- "mm: avoid large folio splits when swap is unavailable" (Johannes Weiner):
Avoid splitting large folios merely to attempt swap when no swap space is
available. There is little point paying for an expensive split when
reclaim cannot actually swap the resulting pages out.
- "mm: workingset: fix the shadow node budget under MGLRU" (Hui Zhu):
Fix the workingset shadow-node budget with MGLRU enabled. Keep the shadow
entries within the intended limits so refault tracking does not quietly
consume more metadata than it should.
- "selftests/mm: TAP output and global-state fixes" (Song Hu):
Fix selftests which produce misleading TAP output or fail to restore global
settings after a run. A test ought to leave the system as it found it,
particularly when a whole suite follows behind.
- "mm: remove page_swap_entry()" (Tal Zussman):
Remove page_swap_entry() and convert its remaining users to the folio and
swap-entry helpers. Lose an old page-level interface and make the swap
paths a little more consistent.
- "mm: refactor zonelist constructors and iterators" (Gregory Price):
Refactor the zonelist construction and walk helpers to reduce duplicated
logic. Keep the allocation ordering rules intact while making it clearer
how zones are selected.
- "mm: kmemleak: batch the struct page scan" (Breno Leitao):
Scan adjacent struct pages in batches instead of taking kmemleak_lock once
for every single page. This preserves scan coverage and the lock-hold
bound, while cutting overhead substantially on debug kernels.
- "mm/damon: misc improvements in tests and documents" (Zenghui Yu (Huawei)):
Fix some DAMON selftests which leave kdamond running or fail under Python
safe-path mode, and improve the KUnit coverage and documentation. Nothing
especially glamorous, but these are worth doing.
- "mm/damon: introduce probe_hits_wsum DAMOS core filter" (SJ Park):
Add a DAMOS core filter using weighted probe-hit counts. This gives
schemes another way to select regions based on what the monitoring probes
observed.
- "mm/mglru: fix ineffective memory protection for non-kswapd reclaim" (Ridong
Chen):
Fix MGLRU's memory protection handling for reclaim outside kswapd. The
protection settings weren't having the intended effect in these paths,
leaving protected memory more exposed than requested.
- "mm/damon: improve readability, clarity and test coverage" (SJ Park):
Simplify a handful of DAMON core helpers, clarify their behavior and expand
test coverage. There are no intended userspace-visible changes in this
batch.
- "mm: replace PF_KCOMPACTD/PF_KSWAPD with kthread_func()" (Kefeng Wang):
Stop identifying reclaim and compaction workers through the PF_KSWAPD and
PF_KCOMPACTD task flags. Use their kthread functions instead and remove
the redundant flag plumbing.
- "mm/hugetlb: fix surplus accounting and availability checks during demotion"
(Longlong Xia):
Fix HugeTLB surplus accounting and availability checks when demoting huge
pages. Keep the counters and reservation decisions consistent as one huge
page turns into several smaller ones.
- "mm/damon: add kunit tests for probe_hits handling and probe params
validation" (Jason Angelov):
Add KUnit tests for DAMON probe-hit handling and invalid probe parameters.
These cover edge cases that were too easy to miss in ordinary monitoring
tests.
- "mm/damon: fix misc bugs in kunit, quota goals and sysfs refresh_ms" (SJ
Park):
Fix a few DAMON bugs in KUnit tests, quota-goal handling and the sysfs
refresh interval. Small fixes, but the incorrect results and control
behavior were real.
- "mm: zswap: optimize zswap invalidate and store" (Kefeng Wang):
Simplify zswap's invalidate and store paths to avoid avoidable lookups and
work. Keep the entry lifetime rules intact while making those frequent
operations cheaper.
- "mm: replace custom ratelimiting logic" (Pedro Falcato):
Replace hand-rolled MM rate limiting with the common kernel helpers. There
is no need to maintain another local version of the same mechanism.
- "mm/vmalloc: minor cleanups" (Ye Liu):
Tidy some vmalloc initialization and reporting code, and pull duplicated
vmap-area insertion work into a helper. No functional changes are
intended.
- "mm/mglru: clean up isolate_folios for readability and clarity" (Ridong
Chen):
Clean up MGLRU's isolate_folios() so the decisions are easier to read and
verify. Keep reclaim behavior unchanged while removing unnecessary twists
in the control flow.
- "Catch automatic storage in IDA and Maple Tree definitions" (Yury Norov):
Catch IDA and maple-tree definitions placed in automatic storage where the
lifetime rules are wrong or easy to get wrong. Add checks so such mistakes
are harder to slip through unnoticed.
- "mm, swap: some random fixes and cleanups" (Kemeng Shi):
Fix and simplify a few unrelated swap paths, removing redundant work and
tidying up error handling. A small collection of things which were better
fixed than left lying around.
- "mm/page_io: folio conversion cleanups" (Tal Zussman):
Finish some page-to-folio conversions in swap I/O, removing obsolete
wrappers and using folio operations consistently. The I/O behavior is
intended to remain the same.
- "mm/swap: skip empty clusters in the swapoff scan" (Youngjun Park):
Skip empty swap clusters during swapoff instead of walking slots which have
nothing to release. This avoids pointless work on sparsely used swap
devices.
- "mm: trace: decode architecture-specific VMA flags" (Meijing Zhao):
Teach the VMA trace output to decode architecture-specific flags, rather
than leaving them as unexplained bits. That should make tracing a good
deal more useful when debugging unusual mappings.
- "mm, swap: don't spin on a bad swap entry" (Breno Leitao):
Stop repeatedly retrying a swap entry which is already known to be bad.
Make the error path terminate cleanly instead of wasting CPU chasing an
entry that cannot be used.
- "mm/page_isolation: fix UBSAN shift-out-of-bounds in
isolate_single_pageblock" (Qi Xi):
Fix an out-of-range shift in isolate_single_pageblock() and tighten its
associated boundary handling. UBSAN found the issue; the result should be
more robust pageblock isolation.
- "mm: khugepaged: fix tracepoint UAF" (Vernon Yang):
Fix a use-after-free in khugepaged tracepoint handling. Make sure the
information recorded by tracing stays valid for as long as the trace event
needs it.
- "mm/damon: fix DAMOS bugs in core, paddr and vaddr" (SJ Park):
Fix several DAMOS problems across the core and physical- and
virtual-address backends. The changes close error cases and bring the
implementations back into agreement.
- "mm/hugetlb_cgroup: move the per-node usage along with the folio" (Hongfu
Li):
Move HugeTLB per-node usage accounting when folios migrate between nodes or
are reparented to another cgroup. Otherwise numa_stat can retain stale
charges and even underflow when the folio is freed.
- "docs/core-api: memory-allocation: add k[mz]alloc_obj() and clarify kmalloc"
(Mike Rapoport (Microsoft)):
Document the typed k[mz]alloc_obj() allocation helpers and clear up some
kmalloc guidance. Make it easier for callers to choose the right
interface.
- "selftests/mm: Validate selections and scope memfd_secret setup" (Tianyi
Chen):
Check selftest selections before running and confine memfd_secret setup to
the cases that actually need it. Avoid confusing failures caused by the
test harness itself.
- "mm/damon: move zero damos quota target_value handling to the core layer"
(SJ Park):
Handle a zero DAMOS quota goal target in the core rather than making each
user of the interface invent its own rule. Keep quota decisions consistent
across callers.
- "mm/damon: Introduce a huge page collapsing mechanism using auto tuning"
(Asier Gutierrez):
Add an auto-tuned DAMON mechanism for collapsing huge pages. Use
monitoring feedback to decide when collapse is worthwhile rather than
forcing one fixed policy onto every workload.
- "kmemleak: fix stale documentation and raise the verbose default" (Breno
Leitao):
Bring the kmemleak documentation up to date and require a third confirming
scan before verbose kernels print a suspected leak. The extra scan helps
suppress transient false positives in noisy debug builds.
- "mm/memory: improve insert_pages() error handling" (Avi Weiss):
Tighten insert_pages() error handling so partial failures are reported and
cleaned up consistently. The caller should not have to guess how far the
operation got.
- "mm/damon: allow NULL or unstarted damon_ctx parameter for damon_call()" (SJ
Park):
Make damon_call() handle NULL and not-yet-started contexts safely.
Simplify the rules for callers and avoid an indefinite wait on an invalid
state.
- "mm/damon: introduce pgidle_set probe filter type" (SJ Park):
Add a pgidle_set DAMON probe filter, giving monitoring users another way to
select pages by their idle-tracking state. Wire it through the filter
interfaces and tests.
- "mm/damon/core: remove unused helper functions" (Cheng-Han Wu):
Remove DAMON core helpers which no longer have callers. Keep the API
surface smaller rather than retaining dead code just in case.
- "mm: stop calling pmd_folio() on special PMDs" (Gregory Price):
Avoid calling pmd_folio() on special PMD mappings that have no struct page.
The old assumption could fault in procfs walkers; use the normal-folio
checks and handle those mappings properly.
- "mm: remove three unused helpers from mm.h" (Tal Zussman):
Remove three unused helpers from mm.h. Fewer obsolete interfaces for the
next person to stumble over.
- "mm/damon: improvements in efficiency, error handling, documents" (Liew Rui
Yan):
Skip needless DAMOS quota work once the quota is full, propagate a missing
sysfs error and tidy a couple of comments. The ignored error could make a
monitoring-start request appear successful when it wasn't.
- "docs/mm/damon/design: add explanation of nr_snapshots" (Liew Rui Yan):
Explain DAMON's nr_snapshots accounting in the design documentation and
straighten out the associated terminology. Make it clearer what users
should expect from that counter.
- "selftests/cgroup: fixes for test_zswap on single core VM" (Wilson Felipe
Pereira):
Fix two test_zswap failures on single-CPU VMs. Wait for the exiting
child's cgroup to become unpopulated before reconfiguring it, and avoid
another test assumption which breaks under constrained scheduling.
- "docs/ksm: fix advisor documentation and comment" (Jinjiang Tu):
Correct the KSM advisor documentation and a misleading code comment. Keep
the description aligned with how the advisor actually works.
- "Fix bugs in HugeTLB allocation when mem_cgroup_charge_hugetlb() fails"
(Ackerley Tng):
Fix HugeTLB allocation cleanup when the memcg charge fails. Make sure
failure exits undo what was allocated rather than leaving stale accounting
or resources behind.
- "mm, memcg: fix memory.peak reset clobbering other fds' watermark" (Ridong
Chen):
Fix memory.peak reset handling so resetting one file descriptor doesn't
overwrite the watermark kept for another. Keep those per-open measurements
independent as intended.
- "mm: reject zone device folios in more folio walkers" (Gregory Price):
Reject zone-device folios in page walkers that cannot safely handle them.
Extend the existing checks rather than assuming every folio has ordinary
system-memory backing.
- "percpu: remove code with no effect" (Sang-Heon Jeon):
Remove a few pieces of percpu code which no longer do anything. There is
no reason to keep maintaining dead paths.
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Merge tag 'mm-stable-2026-10-19-21-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- "selftests/mm: improve khugepaged coverage" (Kiryl Shutsemau):
Give khugepaged a proper workout. Extend the tests to all supported
mTHP orders, check exactly which windows collapsed, and make scan
completion deterministic. Race collapse against faults, pinning, fork
and remap; verify that the contents survive.
Add coverage for whole-page-table zaps and memory pressure too.
- "selftests/mm: separate GUP microbenchmarking from functional testing"
(Sarthak Sharma):
Untangle GUP benchmarking from correctness testing. Move the
benchmark into tools/mm, add a standalone harness-based GUP selftest,
and move shared helpers into tools/lib/mm. Give each tool one job
instead of mixing timing measurements with correctness checks.
Cover the mapping, pinning and batch-size combinations explicitly.
- "mm: Switch device DAX to section-based vmemmap optimization" (Muchun
Song):
Apply section-based vmemmap optimization to device DAX. Rework the
backing metadata layout to save memory while preserving the handling
of device memory hotplug and its different alignment and lifetime
requirements.
- "mm: Introduce section-based vmemmap optimization for HugeTLB"
(Muchun Song):
Cut the memory consumed by HugeTLB's struct page array with
section-based vmemmap optimization. Arrange the metadata so large
huge pages need fewer backing pages, while keeping initialization,
teardown and the various hugepage configurations straight.
- "mm/huge_memory: clean up and decouple the anon and file split
helpers" (Kairui Song):
Separate anonymous and file-backed folio splitting, which have rather
different locking and bookkeeping requirements. Move the work into
separate helpers, drop dead checks and tidy swap-cache handling. Fix
error paths, including one that could leave a folio frozen.
Keep the swap cache cases separate from file-cache splitting.
- "mm: Unconditional per-VMA locks and cleanups" (Dave Hansen):
Make per-VMA locking unconditional and clean up the old conditional
code around it. This removes configuration-dependent plumbing and
lets callers depend on one locking model rather than carrying both
cases along.
- "memcg: remove the v1 soft limit" (Shakeel Butt):
Remove the old cgroup v1 memory soft-limit machinery. This has long
since been superseded by the newer memory-control interfaces; hauling
around a separate reclaim scheme for it no longer buys us much.
- "read proc/pid/smaps_rollup under per-vma lock" (Suren Baghdasaryan):
Read /proc/PID/smaps_rollup using per-VMA locks where possible,
rather than holding mmap_lock across the entire walk. Retain the
contention fallback and add tearing tests. This considerably reduces
latency when another thread is busy changing its mappings.
- "mm/damon: introduce data access-as-a-data attribute" (SJ Park):
Teach DAMON to expose memory access observations as data attributes,
making them available to the probe and filtering machinery. Extend
the interfaces, documentation and tests so the new information can be
used rather than merely collected.
- "Remove PG_private by using page/folio->private checks instead" (Zi
Yan):
Get rid of PG_private and use the folio's private pointer to say
whether private data is attached. Convert the filesystem users,
including erofs, f2fs and md, and clean up the old accessors and
flags. There are a few special cases, notably swapcache and hugetlb,
which need explicit care.
- "mm: make userland page table freeing RCU-safe" (Lorenzo Stoakes):
Make freeing userspace page tables safe against RCU readers. Sort out
the page-table lifetime and locking rules so walkers cannot stumble
over freed tables while mappings are being torn down.
- "make unused huge shrinker memcg aware" (Qi Zheng):
Make shmem's unused-huge-folio shrinker aware of memory cgroups, so
reclaim can find those folios under the right memcg. Wire up the
per-memcg tracking and its lifetime rules, and give the shrinklist
its own lockdep class to avoid spurious dependency reports.
- "mm: Drop pxd_ERROR()" (Anshuman Khandual):
Remove the old pxd_ERROR() page-table checks and their
architecture-specific baggage. Simplify the common page-table
interfaces and callers now that these checks no longer serve a
useful purpose.
- "memcg: group struct fields by access pattern" (Shakeel Butt):
Rearrange memcg's hot and cold fields according to how they're
actually accessed. Keep frequently updated counters and their
neighboring state from fighting over cachelines and reduce needless
cacheline traffic.
- "mm/damon/core: fix the size charged for a filter-trimmed region"
(Donggeun Yoo):
Fix DAMOS quota accounting when a filter trims a monitoring region.
Charge only the part left after filtering, not the original region,
and add KUnit coverage. Previously the excluded memory could eat into
the quota and make schemes run more slowly than requested.
- "mm/damon: add kunit and selftests for probes and probe weights" (SJ
Park):
Add more tests for DAMON probes and their weights, including
validation and the results reported to userspace. This is mostly
about catching regressions in the newer probe infrastructure before
they become harder to diagnose.
- "mm: memcontrol: constify the read side of the read side of the memcg
API" (Tal Zussman):
Mark the read-only parts of the memcg interface const, from folio and
lruvec accessors to counters and swap helpers. Most of this is
mechanical, but it makes the contracts clearer and lets the compiler
catch accidental writes.
- "mm/damon/vaddr: support {prep,apply}_probes" (SJ Park):
Support the new prepare/apply probe operations in DAMON's
virtual-address backend. This brings vaddr monitoring into line with
the probe infrastructure and makes the added probe types useful there
too.
- "mm/mglru: clean up folio counters and flag usage" (Kairui Song):
Simplify MGLRU's folio counters and flag handling. Remove redundant
accounting paths and make the state transitions easier to follow
without changing the intended reclaim policy.
- "arch, mm/execmem: resolve confusion about set_direct_map_valid_noflush()"
(Mike Rapoport (Microsoft)):
Clarify and straighten out the set_direct_map_valid_noflush()
interface across architectures and execmem. Make the requested
mapping changes and the callers' expectations agree, rather than
relying on subtly different architecture behavior.
- "mm: zswap: free cold writeback folios promptly" (Alexandre Ghiti):
Free zswap writeback folios as soon as their disk write completes.
They are cold temporary buffers, so putting them on the LRU only
makes reclaim rediscover them later. Extend swap-cache dropbehind and
let zswap keep these folios off the LRU altogether.
- "mm: gup: cleanup gup_fast call chain" (Aristeu Rozanski):
Clean up the GUP-fast call chain and simplify how the fast-path
helpers pass their arguments and results around. Keep the page-pin
behavior the same while making the call sequence easier to maintain.
- "mm: optimize zone-device memmap initialization" (Li Zhe):
Speed up initialization of zone-device struct pages. Avoid redundant
work when setting up large device-memory ranges, where touching every
descriptor can get expensive.
- "mm/zswap: shrink zswap_entry via a pool id" (Jianyue Wu):
Reduce the size of zswap_entry by storing a compact pool identifier
instead of a full pointer. Keep the pool lookup and lifetime handling
correct while saving per-entry metadata.
- "mm/damon: support access monitoring of hugetlb-backed memory"
(Krishna Iyer):
Let DAMON monitor hugetlb-backed memory too. Extend the relevant
access checks and add coverage so those mappings no longer fall
through a hole in the monitoring machinery.
- "mm/execmem: fixes and cleanups for the ROX cache" (Mike Rapoport):
Tidy execmem's read-only-executable cache and fix its handling of the
awkward allocation and release cases. The aim is to make the cache's
ownership and permission transitions more predictable.
- "zsmallc: remove old object read API" (Sergey Senozhatsky):
Drop zsmalloc's old object-read API and move its remaining users to
the supported access mechanism. This removes a duplicate interface
which we no longer need.
- "mm/mempolicy: stop copying state in the interleave paths" (Gregory
Price):
Stop copying mempolicy state in the interleave paths when a reference
to the existing policy will do. This avoids extra work and makes the
ownership rules less obscure.
- "mm/mglru: speed up inc_min_seq() and fix cold/hot inversions" (Barry
Song):
Make MGLRU's generation advancement cheaper and fix cases where cold
and hot folios end up in the wrong order. Adjust the counter and list
handling so reclaim doesn't keep passing over the better eviction
candidates.
- "mm: Fix MF_DELAYED handling on memory failure" (Lisa Wang):
Treat MF_DELAYED as a partially completed memory-failure operation,
not an outright failure. Propagate that result correctly through
shmem and the generic handler, fix the extra-reference accounting,
and add tests for the resulting SIGBUS behavior.
- "tools/mm/page_owner_sort: fix --sort, add module filter, improve
usage" (Ye Liu):
Fix page_owner_sort's --sort handling, add module-based filtering and
make the usage output more helpful. This makes the tool less
frustrating when tracking down who is holding on to pages.
- "mm/damon: move damos filter range arguments validation to core" (SJ
Park):
Move DAMOS filter range validation into the core, where all callers
can share it. Also close the sysfs read-twice races which could pass
inconsistent ranges, and add tests for invalid input.
- "mm/damon: misc cleanups" (Zenghui Yu):
Clean up a collection of small DAMON rough edges in the core,
interfaces and tests. No large behavior change here, just simpler
code and fewer opportunities for confusion.
- "mm/damon: cleanup code, add test cases, and update guidances in
docs" (SJ Park):
Clean up DAMON's core and interfaces, add missing test cases and
bring the documentation into line with the code. These changes should
make the newer facilities easier to understand and maintain.
- "mm/damon: introduce hugepage_size probe filter" (SJ Park):
Add a DAMON probe filter for hugepage size. Let users select a range
of folio sizes through sysfs, validate the range and document the new
interface, so monitoring can concentrate on memory backed by the
desired hugepage sizes.
- "selftests/mm: pagemap_ioctl test fixes and cleanups" (Zenghui Yu):
Fix some pagemap ioctl test assumptions and clean up their setup and
reporting. Make failures point to the operation that went wrong
rather than to test harness bookkeeping.
- "mm: avoid large folio splits when swap is unavailable" (Johannes
Weiner):
Avoid splitting large folios merely to attempt swap when no swap
space is available. There is little point paying for an expensive
split when reclaim cannot actually swap the resulting pages out.
- "mm: workingset: fix the shadow node budget under MGLRU" (Hui Zhu):
Fix the workingset shadow-node budget with MGLRU enabled. Keep the
shadow entries within the intended limits so refault tracking does
not quietly consume more metadata than it should.
- "selftests/mm: TAP output and global-state fixes" (Song Hu):
Fix selftests which produce misleading TAP output or fail to restore
global settings after a run. A test ought to leave the system as it
found it, particularly when a whole suite follows behind.
- "mm: remove page_swap_entry()" (Tal Zussman):
Remove page_swap_entry() and convert its remaining users to the folio
and swap-entry helpers. Lose an old page-level interface and make the
swap paths a little more consistent.
- "mm: refactor zonelist constructors and iterators" (Gregory Price):
Refactor the zonelist construction and walk helpers to reduce
duplicated logic. Keep the allocation ordering rules intact while
making it clearer how zones are selected.
- "mm: kmemleak: batch the struct page scan" (Breno Leitao):
Scan adjacent struct pages in batches instead of taking kmemleak_lock
once for every single page. This preserves scan coverage and the
lock-hold bound, while cutting overhead substantially on debug
kernels.
- "mm/damon: misc improvements in tests and documents" (Zenghui Yu):
Fix some DAMON selftests which leave kdamond running or fail under
Python safe-path mode, and improve the KUnit coverage and
documentation. Nothing especially glamorous, but these are worth
doing.
- "mm/damon: introduce probe_hits_wsum DAMOS core filter" (SJ Park):
Add a DAMOS core filter using weighted probe-hit counts. This gives
schemes another way to select regions based on what the monitoring
probes observed.
- "mm/mglru: fix ineffective memory protection for non-kswapd reclaim"
(Ridong Chen):
Fix MGLRU's memory protection handling for reclaim outside kswapd.
The protection settings weren't having the intended effect in these
paths, leaving protected memory more exposed than requested.
- "mm/damon: improve readability, clarity and test coverage" (SJ Park):
Simplify a handful of DAMON core helpers, clarify their behavior and
expand test coverage. There are no intended userspace-visible changes
in this batch.
- "mm: replace PF_KCOMPACTD/PF_KSWAPD with kthread_func()" (Kefeng
Wang):
Stop identifying reclaim and compaction workers through the PF_KSWAPD
and PF_KCOMPACTD task flags. Use their kthread functions instead and
remove the redundant flag plumbing.
- "mm/hugetlb: fix surplus accounting and availability checks during
demotion" (Longlong Xia):
Fix HugeTLB surplus accounting and availability checks when demoting
huge pages. Keep the counters and reservation decisions consistent as
one huge page turns into several smaller ones.
- "mm/damon: add kunit tests for probe_hits handling and probe params
validation" (Jason Angelov):
Add KUnit tests for DAMON probe-hit handling and invalid probe
parameters. These cover edge cases that were too easy to miss in
ordinary monitoring tests.
- "mm/damon: fix misc bugs in kunit, quota goals and sysfs refresh_ms"
(SJ Park):
Fix a few DAMON bugs in KUnit tests, quota-goal handling and the
sysfs refresh interval. Small fixes, but the incorrect results and
control behavior were real.
- "mm: zswap: optimize zswap invalidate and store" (Kefeng Wang):
Simplify zswap's invalidate and store paths to avoid avoidable
lookups and work. Keep the entry lifetime rules intact while making
those frequent operations cheaper.
- "mm: replace custom ratelimiting logic" (Pedro Falcato):
Replace hand-rolled MM rate limiting with the common kernel helpers.
There is no need to maintain another local version of the same
mechanism.
- "mm/vmalloc: minor cleanups" (Ye Liu):
Tidy some vmalloc initialization and reporting code, and pull
duplicated vmap-area insertion work into a helper. No functional
changes are intended.
- "mm/mglru: clean up isolate_folios for readability and clarity"
(Ridong Chen):
Clean up MGLRU's isolate_folios() so the decisions are easier to read
and verify. Keep reclaim behavior unchanged while removing
unnecessary twists in the control flow.
- "Catch automatic storage in IDA and Maple Tree definitions" (Yury
Norov):
Catch IDA and maple-tree definitions placed in automatic storage
where the lifetime rules are wrong or easy to get wrong. Add checks
so such mistakes are harder to slip through unnoticed.
- "mm, swap: some random fixes and cleanups" (Kemeng Shi):
Fix and simplify a few unrelated swap paths, removing redundant work
and tidying up error handling. A small collection of things which
were better fixed than left lying around.
- "mm/page_io: folio conversion cleanups" (Tal Zussman):
Finish some page-to-folio conversions in swap I/O, removing obsolete
wrappers and using folio operations consistently. The I/O behavior is
intended to remain the same.
- "mm/swap: skip empty clusters in the swapoff scan" (Youngjun Park):
Skip empty swap clusters during swapoff instead of walking slots
which have nothing to release. This avoids pointless work on sparsely
used swap devices.
- "mm: trace: decode architecture-specific VMA flags" (Meijing Zhao):
Teach the VMA trace output to decode architecture-specific flags,
rather than leaving them as unexplained bits. That should make
tracing a good deal more useful when debugging unusual mappings.
- "mm, swap: don't spin on a bad swap entry" (Breno Leitao):
Stop repeatedly retrying a swap entry which is already known to be
bad. Make the error path terminate cleanly instead of wasting CPU
chasing an entry that cannot be used.
- "mm/page_isolation: fix UBSAN shift-out-of-bounds in
isolate_single_pageblock" (Qi Xi):
Fix an out-of-range shift in isolate_single_pageblock() and tighten
its associated boundary handling. UBSAN found the issue; the result
should be more robust pageblock isolation.
- "mm: khugepaged: fix tracepoint UAF" (Vernon Yang):
Fix a use-after-free in khugepaged tracepoint handling. Make sure the
information recorded by tracing stays valid for as long as the trace
event needs it.
- "mm/damon: fix DAMOS bugs in core, paddr and vaddr" (SJ Park):
Fix several DAMOS problems across the core and physical- and
virtual-address backends. The changes close error cases and bring the
implementations back into agreement.
- "mm/hugetlb_cgroup: move the per-node usage along with the folio"
(Hongfu Li):
Move HugeTLB per-node usage accounting when folios migrate between
nodes or are reparented to another cgroup. Otherwise numa_stat can
retain stale charges and even underflow when the folio is freed.
- "docs/core-api: memory-allocation: add k[mz]alloc_obj() and clarify
kmalloc" (Mike Rapoport):
Document the typed k[mz]alloc_obj() allocation helpers and clear up
some kmalloc guidance. Make it easier for callers to choose the right
interface.
- "selftests/mm: Validate selections and scope memfd_secret setup"
(Tianyi Chen):
Check selftest selections before running and confine memfd_secret
setup to the cases that actually need it. Avoid confusing failures
caused by the test harness itself.
- "mm/damon: move zero damos quota target_value handling to the core
layer" (SJ Park):
Handle a zero DAMOS quota goal target in the core rather than making
each user of the interface invent its own rule. Keep quota decisions
consistent across callers.
- "mm/damon: Introduce a huge page collapsing mechanism using auto
tuning" (Asier Gutierrez):
Add an auto-tuned DAMON mechanism for collapsing huge pages. Use
monitoring feedback to decide when collapse is worthwhile rather than
forcing one fixed policy onto every workload.
- "kmemleak: fix stale documentation and raise the verbose default"
(Breno Leitao):
Bring the kmemleak documentation up to date and require a third
confirming scan before verbose kernels print a suspected leak. The
extra scan helps suppress transient false positives in noisy debug
builds.
- "mm/memory: improve insert_pages() error handling" (Avi Weiss):
Tighten insert_pages() error handling so partial failures are
reported and cleaned up consistently. The caller should not have to
guess how far the operation got.
- "mm/damon: allow NULL or unstarted damon_ctx parameter for
damon_call()" (SJ Park):
Make damon_call() handle NULL and not-yet-started contexts safely.
Simplify the rules for callers and avoid an indefinite wait on an
invalid state.
- "mm/damon: introduce pgidle_set probe filter type" (SJ Park):
Add a pgidle_set DAMON probe filter, giving monitoring users another
way to select pages by their idle-tracking state. Wire it through the
filter interfaces and tests.
- "mm/damon/core: remove unused helper functions" (Cheng-Han Wu):
Remove DAMON core helpers which no longer have callers. Keep the API
surface smaller rather than retaining dead code just in case.
- "mm: stop calling pmd_folio() on special PMDs" (Gregory Price):
Avoid calling pmd_folio() on special PMD mappings that have no struct
page. The old assumption could fault in procfs walkers; use the
normal-folio checks and handle those mappings properly.
- "mm: remove three unused helpers from mm.h" (Tal Zussman):
Remove three unused helpers from mm.h. Fewer obsolete interfaces for
the next person to stumble over.
- "mm/damon: improvements in efficiency, error handling, documents"
(Liew Rui Yan):
Skip needless DAMOS quota work once the quota is full, propagate a
missing sysfs error and tidy a couple of comments. The ignored error
could make a monitoring-start request appear successful when it
wasn't.
- "docs/mm/damon/design: add explanation of nr_snapshots" (Liew Rui
Yan):
Explain DAMON's nr_snapshots accounting in the design documentation
and straighten out the associated terminology. Make it clearer what
users should expect from that counter.
- "selftests/cgroup: fixes for test_zswap on single core VM" (Wilson
Felipe Pereira):
Fix two test_zswap failures on single-CPU VMs. Wait for the exiting
child's cgroup to become unpopulated before reconfiguring it, and
avoid another test assumption which breaks under constrained
scheduling.
- "docs/ksm: fix advisor documentation and comment" (Jinjiang Tu):
Correct the KSM advisor documentation and a misleading code comment.
Keep the description aligned with how the advisor actually works.
- "Fix bugs in HugeTLB allocation when mem_cgroup_charge_hugetlb()
fails" (Ackerley Tng):
Fix HugeTLB allocation cleanup when the memcg charge fails. Make sure
failure exits undo what was allocated rather than leaving stale
accounting or resources behind.
- "mm, memcg: fix memory.peak reset clobbering other fds' watermark"
(Ridong Chen):
Fix memory.peak reset handling so resetting one file descriptor
doesn't overwrite the watermark kept for another. Keep those per-open
measurements independent as intended.
- "mm: reject zone device folios in more folio walkers" (Gregory
Price):
Reject zone-device folios in page walkers that cannot safely handle
them. Extend the existing checks rather than assuming every folio has
ordinary system-memory backing.
- "percpu: remove code with no effect" (Sang-Heon Jeon):
Remove a few pieces of percpu code which no longer do anything. There
is no reason to keep maintaining dead paths.
* tag 'mm-stable-2026-10-19-21-33' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (539 commits)
mm: shmem: assign a lock class to the unused huge shrinklist
mm: vmscan: put rotation-missed folios at the LRU tail
mm: kmemleak: scan the struct page array in MAX_SCAN_SIZE batches
mm: kmemleak: move the struct page scan into a helper
mm/damon: document that a zero sample_interval is accepted
mm/damon: fix typos in comments
mm/damon/sysfs: propagate damon_call() error in turn_damon_on
mm/damon/core: skip quota score setup when the quota is full
mm/damon/tests/core-kunit: test the size charged for a filter-trimmed region
mm/damon/core: charge only the part of a region the filter left
mm: disallow raw PFN mappings of huge/shared zeropage
selftests/mm: zap whole PTE tables in the khugepaged race harness
selftests/mm: add memory-pressure threads to the khugepaged race harness
selftests/mm: race the collapse of windows with holes
selftests/mm: add khugepaged race harness
selftests/mm: check that one khugepaged pass collapses one window
selftests/mm: run every supported collapse order by default
selftests/mm: cover a shared-source collapse write race
selftests/mm: parameterize the mixed-source collapse case by source order
selftests/mm: add order-parameterized khugepaged collapse cases
...
|
||
|
Linus Torvalds
|
734bef548a |
Networking changes for 7.4.
Core & protocols
----------------
- Continue the work on removing rtnl_lock dependencies:
- per-netns ARP and ND neighbour tables, with the default settings
now configurable per netns (inheritance from init_net is
controlled by the new net.core.neigh_inherit_init_net sysctl)
- RCU-protected configuration and rtnl_lock-less fill_info() for
hsr, netkit, sit, vlan and vxlan devices
- per-netns device unregistration for ip tunnel and gre devices
- use the netdev instance lock instead of rtnl_lock when reading
speed and duplex via sysfs
- batch the flushing of uncached routes at device unregistration
time, relieving rtnl_lock contention on netns dismantle.
- Add hardware pacing offload support, admin-controlled via a new
rtnetlink attribute, with sch_fq integration (implemented in idpf).
- Re-segment BIG TCP GSO packets into GSO packets fitting the
egress device limits instead of plain MSS-sized segments,
improving throughput for mixed BIG TCP / non-BIG TCP paths
by up to 70%.
- Generate RSS keys that spread flows over all the RX queues; the
previous random keys could leave some queues unused.
- Optimize the bridge VLAN forwarding paths: cache the port-VLAN in fdb
entries and consider only VLAN members when flooding, for ~10% more
Mpps in the fdb forwarding path.
- A few TCP/IP performance improvements aimed at efficient cache
usage and reducing contention.
- Add the TCP ROCCET congestion control, a CUBIC variant aimed at
avoiding bufferbloat in cellular networks.
- Continue the conversion of getsockopt callbacks to sockopt_t.
- Add an ethtool command to list the front-facing ports of an
interface, including SFP cages and modules, using the phy_port
representation.
- Enable BIG TCP support for bareudp tunnels.
- Remove the IPV6_ADDRFORM socket option and disallow buggy TCP state
transitions (listen() + shutdown() + connect() and connect() +
connect(AF_UNSPEC) + listen()).
- Remove most BUG_ON()s from core packet processing, replacing them
with error paths.
Wireless
--------
- Latency improvements, including lockless station get/dump and beacon
updates, plus RTNL reduction and locking cleanups.
- Infrastructure for non-station TX/RX with MLO.
- NAN (Wi-Fi Aware) Instant Communication support and other NAN
improvements.
- Control frame Integrity Protocol (CIP) and protected TWT support.
- Improvements for AP regulatory checks.
Netfilter
---------
- Disable br_netfilter in user namespaces and schedule it for removal
in 2027.
- Restrict the raw table in nft_compat to the specific family, hook and
priority.
- Prepare the flowtable for mixed IPv4-over-IPv6 tunneling (and
vice versa).
- Use GFP_KERNEL_ACCOUNT for most netfilter allocations, for better
integration with memcg.
- Allow discovering conntrack zone filtering support in ctnetlink
dumps, and fix nfnetlink_hook handling of large dumps.
Deletions
---------
- Move the LLC type 2 sockets out of tree. There are no known users and
the code attracts a never-ending stream of LLM-driven fixes.
Device drivers
--------------
- New drivers:
- Meta Platforms NIC (mpnic), the second-generation NIC from Meta
- initial skeleton of the Nebula-matrix NICs driver (nbl)
- X-Powers AC200/AC300 Fast Ethernet PHYs
- Ethernet high-speed NICs:
- Intel:
- i40e: XDP metadata support for RX hash and VLAN tag
- ice: expose the E825 TSPLL state via the DPLL subsystem
- nVidia/Mellanox:
- move the data direct infrastructure from IB to core, in
preparation for netdev support.
- reduce the memory used per offloaded TC rule
- Meta (fbnic):
- support large io_uring zero-copy RX buffers
- Microsoft vNIC (mana):
- add BQL support
- Ethernet NICs consumer, and embedded:
- Airoha:
- LRO offload support
- Cadence (macb):
- context swapping for ringparam and MTU changes, avoiding
buffer loss under memory pressure
- Mucse (rnpgbe):
- TX/RX and link status support
- NXP (enetc):
- SR-IOV improvements and VF support for ENETC v4
- Qualcomm (ppe):
- IPQ5424 support
- Realtek PCI (r8169):
- phylink support
- RSS support for RTL8127
- Renesas (ravb):
- gPTP support for R-Car Gen4
- Synopsys (stmmac):
- XDP multi-buffer support on the TX side
- tc mqprio hw queue priority offload
- support for RK3568 SGMII, Allwinner H616 EMAC1, UltraRISC
DP1000 and Qualcomm sa8255p
- Ethernet switches:
- Mediatek (mt7530):
- fast age and change conduit support
- Microchip (ksz):
- support for KSZ8995XA/KS8995XA
- Microchip (lan966x):
- PCIe FDMA support, ~20x throughput increase in PCIe endpoint
- Microchip (sparx5):
- Time Aware Shaper (taprio) offload
- Motorcomm (yt921x):
- LED and SerDes PCS support
- Realtek (rtl8365mb):
- EEE support
- Ethernet PHYs:
- Broadcom:
- enable jumbo frames on BCM54xx
- Realtek:
- support for RTL8261CE_CG and RTL8261D_VM
- MDIO support for RTL838x and RTL839x
- WiFi drivers:
- Broadcom (brcmfmac):
- FT/OKC roaming offload
- Intel (iwlwifi):
- UHR sniffer support
- support for newer UEFI/BIOS tables
- MediaTek (mt76):
- mt7925 NAN improvements
- offchannel/scan improvements and MLO fixes
- Morse Micro (mm81x):
- monitor mode support
- Qualcomm (ath12k):
- IPQ5332 platform infrastructure
- Realtek (rtw88):
- RTL8723BS support
- SDIO TX performance improvements
- Realtek (rtw89):
- P2P_DEVICE support
- BT-coex updates for RTL8922D
- Bluetooth:
- move H:4 reassembly into the Bluetooth core
- add generic support for vendor packets
- MGMT: add security level changed event
- Bluetooth drivers:
- btusb: support Bulk Serialization Mode
- Intel: support Draco and Titan Lake, allow unsigned firmware
- Mediatek: MT7928 support
- Qualcomm: QCC2072 support
- Broadcom: Synaptics 4384 support
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Merge tag 'net-next-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next
Pull networking updates from Paolo Abeni:
"This includes a significant number of low-priority fixes - especially
in the NIC drivers area - that we deferred from the last few RCs in
the previous cycle, which can't be easily outlined in the synopsis
below.
Core & protocols:
- Continue the work on removing rtnl_lock dependencies:
- per-netns ARP and ND neighbour tables, with the default settings
now configurable per netns (inheritance from init_net is
controlled by the new net.core.neigh_inherit_init_net sysctl)
- RCU-protected configuration and rtnl_lock-less fill_info() for
hsr, netkit, sit, vlan and vxlan devices
- per-netns device unregistration for ip tunnel and gre devices
- use the netdev instance lock instead of rtnl_lock when reading
speed and duplex via sysfs
- batch the flushing of uncached routes at device unregistration
time, relieving rtnl_lock contention on netns dismantle.
- Add hardware pacing offload support, admin-controlled via a new
rtnetlink attribute, with sch_fq integration (implemented in idpf).
- Re-segment BIG TCP GSO packets into GSO packets fitting the egress
device limits instead of plain MSS-sized segments, improving
throughput for mixed BIG TCP / non-BIG TCP paths by up to 70%.
- Generate RSS keys that spread flows over all the RX queues; the
previous random keys could leave some queues unused.
- Optimize the bridge VLAN forwarding paths: cache the port-VLAN in
fdb entries and consider only VLAN members when flooding, for ~10%
more Mpps in the fdb forwarding path.
- A few TCP/IP performance improvements aimed at efficient cache
usage and reducing contention.
- Add the TCP ROCCET congestion control, a CUBIC variant aimed at
avoiding bufferbloat in cellular networks.
- Continue the conversion of getsockopt callbacks to sockopt_t.
- Add an ethtool command to list the front-facing ports of an
interface, including SFP cages and modules, using the phy_port
representation.
- Enable BIG TCP support for bareudp tunnels.
- Remove the IPV6_ADDRFORM socket option and disallow buggy TCP state
transitions (listen() + shutdown() + connect() and connect() +
connect(AF_UNSPEC) + listen()).
- Remove most BUG_ON()s from core packet processing, replacing them
with error paths.
Wireless:
- Latency improvements, including lockless station get/dump and
beacon updates, plus RTNL reduction and locking cleanups.
- Infrastructure for non-station TX/RX with MLO.
- NAN (Wi-Fi Aware) Instant Communication support and other NAN
improvements.
- Control frame Integrity Protocol (CIP) and protected TWT support.
- Improvements for AP regulatory checks.
Netfilter:
- Disable br_netfilter in user namespaces and schedule it for removal
in 2027.
- Restrict the raw table in nft_compat to the specific family, hook
and priority.
- Prepare the flowtable for mixed IPv4-over-IPv6 tunneling (and vice
versa).
- Use GFP_KERNEL_ACCOUNT for most netfilter allocations, for better
integration with memcg.
- Allow discovering conntrack zone filtering support in ctnetlink
dumps, and fix nfnetlink_hook handling of large dumps.
Deletions:
- Move the LLC type 2 sockets out of tree. There are no known users
and the code attracts a never-ending stream of LLM-driven fixes.
Device drivers:
- New drivers:
- Meta Platforms NIC (mpnic), the second-generation NIC from Meta
- initial skeleton of the Nebula-matrix NICs driver (nbl)
- X-Powers AC200/AC300 Fast Ethernet PHYs
- Ethernet high-speed NICs:
- Intel:
- i40e: XDP metadata support for RX hash and VLAN tag
- ice: expose the E825 TSPLL state via the DPLL subsystem
- nVidia/Mellanox:
- move the data direct infrastructure from IB to core, in
preparation for netdev support.
- reduce the memory used per offloaded TC rule
- Meta (fbnic):
- support large io_uring zero-copy RX buffers
- Microsoft vNIC (mana):
- add BQL support
- Ethernet NICs consumer, and embedded:
- Airoha:
- LRO offload support
- Cadence (macb):
- context swapping for ringparam and MTU changes, avoiding
buffer loss under memory pressure
- Mucse (rnpgbe):
- TX/RX and link status support
- NXP (enetc):
- SR-IOV improvements and VF support for ENETC v4
- Qualcomm (ppe):
- IPQ5424 support
- Realtek PCI (r8169):
- phylink support
- RSS support for RTL8127
- Renesas (ravb):
- gPTP support for R-Car Gen4
- Synopsys (stmmac):
- XDP multi-buffer support on the TX side
- tc mqprio hw queue priority offload
- support for RK3568 SGMII, Allwinner H616 EMAC1, UltraRISC
DP1000 and Qualcomm sa8255p
- Ethernet switches:
- Mediatek (mt7530):
- fast age and change conduit support
- Microchip (ksz):
- support for KSZ8995XA/KS8995XA
- Microchip (lan966x):
- PCIe FDMA support, ~20x throughput increase in PCIe endpoint
- Microchip (sparx5):
- Time Aware Shaper (taprio) offload
- Motorcomm (yt921x):
- LED and SerDes PCS support
- Realtek (rtl8365mb):
- EEE support
- Ethernet PHYs:
- Broadcom:
- enable jumbo frames on BCM54xx
- Realtek:
- support for RTL8261CE_CG and RTL8261D_VM
- MDIO support for RTL838x and RTL839x
- WiFi drivers:
- Broadcom (brcmfmac):
- FT/OKC roaming offload
- Intel (iwlwifi):
- UHR sniffer support
- support for newer UEFI/BIOS tables
- MediaTek (mt76):
- mt7925 NAN improvements
- offchannel/scan improvements and MLO fixes
- Morse Micro (mm81x):
- monitor mode support
- Qualcomm (ath12k):
- IPQ5332 platform infrastructure
- Realtek (rtw88):
- RTL8723BS support
- SDIO TX performance improvements
- Realtek (rtw89):
- P2P_DEVICE support
- BT-coex updates for RTL8922D
- Bluetooth:
- move H:4 reassembly into the Bluetooth core
- add generic support for vendor packets
- MGMT: add security level changed event
- Bluetooth drivers:
- btusb: support Bulk Serialization Mode
- Intel: support Draco and Titan Lake, allow unsigned firmware
- Mediatek: MT7928 support
- Qualcomm: QCC2072 support
- Broadcom: Synaptics 4384 support"
* tag 'net-next-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2126 commits)
Bluetooth: btusb: disable by default Qualcomm multi-subsystem
tipc: fix broadcast sender hang on last acker departure
tipc: fix use-after-free of broadcast reception link at node release
r8169: clear TX LPI on RTL8168h at link up after phylink conversion
tun: Require CAP_NET_ADMIN to attach to an ownerless device
net/sched/sch_cake: drop dead nla_nest_end() error check
net/sched/sch_cake: widen buffer_used to u64
net/sched/sch_cake: reduce parent backlog when clearing a tin
net/sched/sch_cake: serialize reconfiguration with the datapath
tg3: Add Datto SIRIS 5 1U Server to restart AER quirk table
net/mlx5e: Stop asserting for RTNL when closing channels
net: shrink the payload-only part of skb dataref to one bit
net: wwan: iosm: validate msg_head before indexing msg_ring
net: bgmac: rate limit RX error messages
selftests: net: veth: test XDP_TX to a peer with GRO enabled
veth: schedule the peer's NAPI after XDP_TX when only GRO is enabled
pppoe: delete session hash entries by pointer match
net: lan969x: don't disable hardirqs in fdma tx clear
net: sparx5/lan969x: do not clobber the PSFP cycle timer update period
net: lan969x: fix DSM calendar for empty taxis
...
|
||
|
Linus Torvalds
|
864c07de0c |
hardening updates for v7.4-rc1
- Provide kmalloc_obj*-style API for devm_kmalloc() - Improve seq_buf API for saner C String handling with several bug fixes along the way (Kees Cook, Bill Wendling) - Overflow helper readability improvements (Bill Wendling) - Unexport native_write_cr4() (Dennis Chen) - um: fix CONFIG_GCOV for built-in code (Johannes Berg) - Improve stackinit test coverage (Justin Stitt) - KMSAN: fix memset() when using fortify-source, again (Arnd Bergmann) - lkdtm: use kmalloc() instead of __get_free_page (Mahad Ibrahim) - signalfd: don't dequeue the forced fatal signals (Oleg Nesterov) - Fix randstruct to recognize new container_of() behavior - coccinelle: kmalloc_obj: Convert multi-byte integral allocations too - Fix a couple remaining allocation return type mismatches -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRSPkdeREjth1dHnSE2KwveOeQkuwUCatpUqAAKCRA2KwveOeQk u6f7AQCmaAF+jGVxeljdguKRrge+bjxpsK+RIyDzf7JMUauxPwD/RvGklH+QCACS xj4tExbgBFOAo48uvqfUiGsJLaCJAQg= =uEMy -----END PGP SIGNATURE----- Merge tag 'hardening-v7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull hardening updates from Kees Cook: - Provide kmalloc_obj*-style API for devm_kmalloc() - Improve seq_buf API for saner C String handling with several bug fixes along the way (Kees Cook, Bill Wendling) - Overflow helper readability improvements (Bill Wendling) - Unexport native_write_cr4() (Dennis Chen) - um: fix CONFIG_GCOV for built-in code (Johannes Berg) - Improve stackinit test coverage (Justin Stitt) - KMSAN: fix memset() when using fortify-source, again (Arnd Bergmann) - lkdtm: use kmalloc() instead of __get_free_page (Mahad Ibrahim) - signalfd: don't dequeue the forced fatal signals (Oleg Nesterov) - Fix randstruct to recognize new container_of() behavior - coccinelle: kmalloc_obj: Convert multi-byte integral allocations too - Fix a couple remaining allocation return type mismatches * tag 'hardening-v7.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: (29 commits) overflow: Match arithmetic in both parts of __builtin_choose_expr lkdtm: Make UNSET_SMEP built-in-only and unexport native_write_cr4() extcon: realtek: Remove const from type_c_cfg allocation type coresight: cti: Add const to con_groups allocation type docs: core-api: Document the seq_buf API nvdimm: ndtest: Return the string length from flags_show() powerpc/papr_scm: Return the string length from the sysfs show functions seq_buf: Add seq_buf_init_append() bpf: Remove dead newline stripping from format_disasm_line() seq_buf: Add seq_buf_terminate() seq_buf: Add seq_buf_strlen() seq_buf: Clear what a writer did not claim when a seq_buf overflows seq_buf: Copy what fits when seq_buf_puts() and seq_buf_putmem() overflow scsi: lpfc: Print rx monitor records straight into the seq_buf seq_buf: Do not pop from an overflowed seq_buf seq_buf: Do not print an empty line from an overflowed seq_buf_do_printk() .get_maintainer.ignore: Add Kees Cook devres: Provide kmalloc_obj*-style API for devm_kmalloc mm: Move default_gfp() into gfp_types.h kunit/stackinit: Clean up XFAIL under instrumentation ... |
||
|
Linus Torvalds
|
2e51c645fe |
soc: driver updates for 7.4
There are lots of minor updates for driver subsystems managed through
the soc tree (turris-omnia platform, cache driver, tee drivers, arm-cci,
bus, memory) as well as soc vendor specific drivers (starfive, xilinx,
microchip, nxp, amlogic, imx, renesas, samsung, ti, nvidia).
The more notable changes are:
- Larger updates for Qualcomm SoCs including support for SM8950 (Maili)
SM8975 (Hawi), Glymur, Shikra, and IPQ5424
- Added SoC support for Exynos5515, Tegra264, Tegra410, R8A774A3,
and MT8167 in existing drivers
- Arm SCMI firmware driver support for ACPI PCC transport and module
autoloading of protocol specific drivers
- Apple crash log support for CrgA embedded controller
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Merge tag 'soc-drivers-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull SoC driver updates from Arnd Bergmann:
"There are lots of minor updates for driver subsystems managed through
the soc tree (turris-omnia platform, cache driver, tee drivers,
arm-cci, bus, memory) as well as soc vendor specific drivers
(starfive, xilinx, microchip, nxp, amlogic, imx, renesas, samsung, ti,
nvidia).
The more notable changes are:
- Larger updates for Qualcomm SoCs including support for SM8950
(Maili) SM8975 (Hawi), Glymur, Shikra, and IPQ5424
- Added SoC support for Exynos5515, Tegra264, Tegra410, R8A774A3, and
MT8167 in existing drivers
- Arm SCMI firmware driver support for ACPI PCC transport and module
autoloading of protocol specific drivers
- Apple crash log support for CrgA embedded controller"
* tag 'soc-drivers-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (176 commits)
platform: cznic: turris-omnia-mcu: stop button emulation producers
cache: Make cpu_cache_invalidate_memregion() error out if there are no handlers
soc: mpfs: use kref cleanup on probe failure
arm64: enable HAVE_SHARED_GPIOS for all ARM64 platforms
bus: arm-cci: Drop cci-control-port node reference in __cci_ace_get_port()
bus: arm-cci: Drop CPU node reference in cci_ace_init_ports()
soc: fsl: dpio: Free the IRQ before releasing the I/O object
soc: fsl: dpio: Fix cleanup on IRQ registration failure
bus: fsl-mc: Annotate fsl_mc_io.portal_virt_addr with __counted_by_ptr
bus: fsl-mc: drop the fwnode links of the dpmacs nodes
soc: fsl: cpm1: tsa: Fix clock leak in tsa_of_parse_tdms()
soc: qcom: geni-se: Drop unused icc_ddr parameter from geni_icc_get()
firmware: qcom: scm: Allow QSEECOM on ThinkPad T14s Gen 7
dt-bindings: mailbox: qcom: Document Maili CPUCP mailbox controller
dt-bindings: spmi: glymur-spmi-pmic-arb: Add compatible for Qualcomm Maili SoC
soc: qcom: pmic_pdcharger_ulog: prevent work requeue during remove
ASoC: dt-bindings: qcom,apr: Add modem_apps GLINK channel for shikra
firmware: qcom: tzmem: disable SHM bridge for SM7125 platform
soc: qcom: ubwc: Add Kalambo UBWC config
firmware: qcom: scm: Allow QSEECOM on Kalambo CRD
...
|
||
|
Linus Torvalds
|
bb29b957ea |
Kbuild / Kconfig updates for 7.4
Kbuild:
- Suppress compiler flags in debug info for external module builds
- Use '-fmacro-prefix-map' in more places in the build
- Merge initial set of changes from Lorenzo's speed up series, along
with some fixes found through testing
- Avoid allocating .modinfo in vmlinux
- Speed up kallsyms by indexing symbols by token and outputting binary
data to disk directly then including in assembly via .incbin
- Don't sort $(NM) output when unnecessary
- Only emit relocations on the final vmlinx link
- Reimplement mksysmap in C
- Move many cc-option and ld-option calls into the Kconfig stage to
cache their results
- Use pigz for gzip compression when available
- Move gen_init_cpio and gen_initramfs.sh from usr/ to scripts/
- Add a TOML configuration to scripts/container and update documentation
accordingly
- Add a generic, opt-in mechanism for checking that headers can compile
standalone
- Update machine function splitting argument for LLVM 24 rename in
AutoFDO build
- Miscellaneous minor clean ups, fixes, and hardening, mostly
found/fixed via LLMs
Kconfig:
- Turn recursive ranges into an error
- Fix savedefconfig for defaults that were adjusted for being out of
range and revert a previously applied workaround
- Improvements and hardening around integer and hexadecimal values
- Emit a warning when selecting or implying a choice symbol, which has no
effect
- Emit a warning when KCONFIG_PROBABILITY is malformed
- Introduce def_string / def_int / def_hex to mirror the existing
def_bool / def_tristate to succinctly set a value and type at the same
time.
- Add cc-option-str and ld-option-str macros to act like Kbuild's
cc-option and ld-option, returning the string when the option is
supported, allowing many checks to be moved into Kconfig
- Minor usability improvements to Kconfig tests
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
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Merge tag 'kbuild-7.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux
Pull Kbuild / Kconfig updates from Nathan Chancellor:
"Kbuild:
- Suppress compiler flags in debug info for external module builds
- Use '-fmacro-prefix-map' in more places in the build
- Merge initial set of changes from Lorenzo's speed up series, along
with some fixes found through testing:
- Avoid allocating .modinfo in vmlinux
- Speed up kallsyms by indexing symbols by token and outputting
binary data to disk directly then including in assembly via
.incbin
- Don't sort $(NM) output when unnecessary
- Only emit relocations on the final vmlinx link
- Reimplement mksysmap in C
- Move many cc-option and ld-option calls into the Kconfig stage to
cache their results
- Use pigz for gzip compression when available
- Move gen_init_cpio and gen_initramfs.sh from usr/ to scripts/
- Add a TOML configuration to scripts/container and update
documentation accordingly
- Add a generic, opt-in mechanism for checking that headers can
compile standalone
- Update machine function splitting argument for LLVM 24 rename in
AutoFDO build
- Miscellaneous minor clean ups, fixes, and hardening, mostly
found/fixed via LLMs
Kconfig:
- Turn recursive ranges into an error
- Fix savedefconfig for defaults that were adjusted for being out of
range and revert a previously applied workaround
- Improvements and hardening around integer and hexadecimal values
- Emit a warning when selecting or implying a choice symbol, which
has no effect
- Emit a warning when KCONFIG_PROBABILITY is malformed
- Introduce def_string / def_int / def_hex to mirror the existing
def_bool / def_tristate to succinctly set a value and type at the
same time.
- Add cc-option-str and ld-option-str macros to act like Kbuild's
cc-option and ld-option, returning the string when the option is
supported, allowing many checks to be moved into Kconfig
- Minor usability improvements to Kconfig tests"
* tag 'kbuild-7.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux: (59 commits)
kbuild: AutoFDO: Update split machine function argument for upstream rename
kbuild: Mark the initcall ordering recipe as recursive
kbuild: Mark the gzip recipes as recursive
localmodconfig: Explicitly report boolean configs during integrity check
scripts/make_fit: Ignore schema checks when decomposing DTBs
clang-tools: Import os for broken pipe handling
kconfig: use the value argument in sym_get_near_range_bound()
kconfig: fix infinite loop in conf_choice() when no choice value is visible
kconfig: cleanup stale comment about 'keys' array
kconfig: Improve ergonomics around disabling warnings with cc-option
scripts/Kconfig.toolchain: Drop compiler symbols from dependencies
checkkconfigsymbols.py: Parse Git status output line by line
gen_init_cpio: stop parsing on lines with a missing argument list
.gitignore: drop Module.markers
.gitignore: ignore pacman package signatures
kbuild: add header check facility as a manually run static analyzer
Documentation: dev-tools: refer to user ID rather than id
Documentation: dev-tools: update container.rst with config file
scripts: add TOML config to container tool
kconfig: tests: {old,save}defconfig: Forward dynamic keyword arguments
...
|
||
|
Linus Torvalds
|
12d5fc96eb |
Rust changes for v7.4
Toolchain and infrastructure:
- Update vendored 'zerocopy' crate to v0.8.62 (released 2026-10-08).
This update advances 8 releases, with 3 of them carrying most of the
changes. It contains new features as well as fixes. However, almost
nothing has changed that requires updates on our side (a move of our
non-ASCII change and the addition of an SPDX license identifier).
- Generate Rust KUnit test suites for doctests reusing the
'#[kunit_tests]' and '#[test]' attributes instead of C FFI
functions, which allows to remove the generated C glue file.
Relatedly, simplify 'kunit_assert!' by using 'file!()' and 'line!()'
inside (which doctests override as needed), which allows to remove
the 'file' helper and 'CONFIG_RUSTC_HAS_SPAN_FILE'.
- Trim the function names in doctests generated by 'rustdoc' < 1.95.0
when building with 'O=', which were not reproducible.
- Fix the 'VM_MAYSHARE' value in the generated bindings and its
blocklist entry, due to typos.
- Build 'core' with '--cfg no_io_statics' to ensure 'core' does not
introduce any use of 'core::sync::atomic' into the kernel image
since upstream Rust is moving 'std::io::Error' into 'core', which
uses a global atomic pointer.
Upstream Rust merged a PR to add a test checking that builds of
'core' are warning-free with that 'cfg' enabled.
- Enable the unstable 'proc_macro_span' feature in 'proc-macro2',
which provides 'Span::join' and thus improves the quality of the
diagnostics of all our procedural macros, notably 'pin-init'. This
is only used for producing diagnostics, thus there is no hard
reliance on the feature.
- Globally allow 'clippy::comparison_chain', since its suggestions are
not always ideal and upstream downgraded it to 'pedantic' too.
'kernel' crate:
- New 'mem' module: add the 'Align<N>' zero-sized type so that
alignment can be specified via const generics ('repr(align(...))'
only works with integer literals), e.g.:
const N: usize = 128;
struct S {
_align: Align<N>,
}
assert_eq!(align_of::<S>(), N);
- New 'ratelimit' module: add the 'Ratelimit' abstraction for 'struct
ratelimit_state' and, based on it, the 'pr_*_ratelimited!' printing
macros, which can be used for printing that may be triggered by
userspace.
In addition, convert Rust Binder to use them.
- 'sync' module: to construct a global 'struct ratelimit_state', add a
'const' constructor for 'raw_spinlock_t'.
In addition, move the lockdep types into a new 'sync::lockdep'
submodule, since there were starting to be too many of them.
- 'num' module: add the 'cv!' macro to create constant values ("cv")
from an integer constant expression, with validity checked at
compile time, inferring the target type from the context. It works
for any type that implements the new 'FromConst' trait, e.g.:
let a: Alignment = cv!(4096);
let b: Bounded<u32, 4> = cv!(15);
// Any integer constant expression works, not only literals.
let m: NonZero<usize> = cv!(usize::MAX);
// Checked narrowing, including in `const` items.
const SMALL: u8 = cv!(200u32);
// The target type can be given explicitly.
let e = cv!(200u32 => u8);
// With an explicit primitive target, the expression can use
// generic parameters.
const fn as_u64<const KEY: u16>() -> u64 {
cv!(KEY => u64)
}
This avoids the verbose turbofish syntax which disincentivized using
these types at interface boundaries (e.g. 'Alignment:🆕:<8>()').
- 'alloc' module:
- Allow different error types in 'KBox::pin_slice()', enabling use
of infallible initializers.
- Add 'NumaNode::id()' accessor to retrieve the underlying NUMA
node identifier.
- 'time' module:
- Add 'Delta::to_jiffies_timeout()' for use in timeout arguments.
- Add 'Delta::as_jiffies_unsigned()'.
- Make 'Delta::ZERO' generic over the time unit.
- Warn and assert when passing out-of-range inputs to 'fsleep' and
'udelay'.
- Rename 'ClockSource' to 'ClockId' to better align with naming
conventions in C kernel.
- Make 'CONFIG_HZ' value available as 'bindings::HZ'.
- Add implementation detail documentation for 'HrTimer'.
- 'bitmap' module:
- Add contiguous area operations ('next_zero_area{,_off}', 'set'
and 'clear'), with extra checks compared to the underlying C
code, plus additional ones under 'CONFIG_RUST_BITMAP_HARDENED'.
It includes tests demonstrating the edge cases.
- Restrict bitmap length to at most 'i32::MAX', matching
'BitmapVec::MAX_LEN' and simplifying a few things. This also
fixes 'u32' casts truncating in 'copy_and_extend', which could
otherwise lead to OOB writes.
- 'bug' module:
- Fix 'warn_on!' on UML which called 'warn_slowpath_fmt()' with
the wrong arguments; and fix its '// SAFETY:' comment too.
- Add a KUnit test for 'warn_on!'.
- 'id_pool' module: add contiguous ID reservation via the new
'reserve_ids' and 'release_ids' methods, built on top of the new
bitmap area operations.
- 'sizes' module: add the sub-1K size constants ('SZ_1' to 'SZ_512')
and implement 'SizeConstants' for 'Alignment', so that one can write
e.g. 'Alignment::SZ_8'.
'macros' crate:
- Add '#[optional]' attribute for optional methods in '#[vtable]' to
replace the 'build_error!(VTABLE_DEFAULT_ERROR)' boilerplate, e.g.:
#[vtable]
pub trait Operations: Sized {
#[optional]
fn f(&self) -> Result;
}
In addition, apply it to miscdevice and hide generated 'HAS_'
constants for required methods.
- Allow non-ASCII characters in the 'authors' field of the 'module!'
macro, which was unintentionally restricted when multiple authors
support was introduced.
'pin-init' crate:
[ Extra context from Gary's pull request:
"This is a cycle packed with feature updates. Two of the most
anticipated features, tuple struct support and safe self
reference creation, has been included in this pull request.
Safe self reference is a big one and is pushed a bit late in the
cycle. The initial plan was to include a minimum subset for this
cycle because I was worried about potential soundness issues;
however during Plumbers it was agreed that the features should be
upstreamed at once. This is because the initial users (Nova,
JobQueue) would all need the advanced features, so it is better
to ensure that the feature get put into use for real, and it can
iterate with users, rather than being fully designed on paper.
The existing safety checks are already very comprehensive, and
Benno and I are confident that if new ones are discovered, it
wouldn't affect the overall design.
That said, the the usage of the advanced features (invariance,
existential lifetime) shall be limited to the pre-agreed users
only, so even in case where the feature needs to be reworked, the
blast radius is limited.
Another theme in this cycle is to improve the developer
experience when things are used wrongly. A lot of work has been
done to use proper spans from user-provided tokens so error
message point to things that cause them. Many common misuse
scenarios also gain additional custom diagnostics." ]
- User visible changes:
- Support tuple structs.
- Allow safe creation of self references.
- Vastly improve diagnostics for common misuse scenarios.
- Other changes:
- Use 'mixed_site' hygiene consistently.
'MAINTAINERS':
- Add 'RUST [BUG]' entry for the Rust 'bug' module (i.e. 'warn_on!'),
which will be maintained by FUJITA Tomonori -- thank you!
- Add Alice Ryhl as co-maintainer for 'Rust [ALLOC]'.
And some other fixes, cleanups and improvements.
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Merge tag 'rust-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux
Pull Rust updates from Miguel Ojeda:
"Toolchain and infrastructure:
- Update vendored 'zerocopy' crate to v0.8.62 (released 2026-10-08).
This update advances 8 releases, with 3 of them carrying most of
the changes. It contains new features as well as fixes. However,
almost nothing has changed that requires updates on our side (a
move of our non-ASCII change and the addition of an SPDX license
identifier).
- Generate Rust KUnit test suites for doctests reusing the
'#[kunit_tests]' and '#[test]' attributes instead of C FFI
functions, which allows to remove the generated C glue file.
Relatedly, simplify 'kunit_assert!' by using 'file!()' and
'line!()' inside (which doctests override as needed), which allows
to remove the 'file' helper and 'CONFIG_RUSTC_HAS_SPAN_FILE'.
- Trim the function names in doctests generated by 'rustdoc' < 1.95.0
when building with 'O=', which were not reproducible.
- Fix the 'VM_MAYSHARE' value in the generated bindings and its
blocklist entry, due to typos.
- Build 'core' with '--cfg no_io_statics' to ensure 'core' does not
introduce any use of 'core::sync::atomic' into the kernel image
since upstream Rust is moving 'std::io::Error' into 'core', which
uses a global atomic pointer.
Upstream Rust merged a PR to add a test checking that builds of
'core' are warning-free with that 'cfg' enabled.
- Enable the unstable 'proc_macro_span' feature in 'proc-macro2',
which provides 'Span::join' and thus improves the quality of the
diagnostics of all our procedural macros, notably 'pin-init'. This
is only used for producing diagnostics, thus there is no hard
reliance on the feature.
- Globally allow 'clippy::comparison_chain', since its suggestions
are not always ideal and upstream downgraded it to 'pedantic' too.
'kernel' crate:
- New 'mem' module: add the 'Align<N>' zero-sized type so that
alignment can be specified via const generics ('repr(align(...))'
only works with integer literals), e.g.:
const N: usize = 128;
struct S {
_align: Align<N>,
}
assert_eq!(align_of::<S>(), N);
- New 'ratelimit' module: add the 'Ratelimit' abstraction for 'struct
ratelimit_state' and, based on it, the 'pr_*_ratelimited!' printing
macros, which can be used for printing that may be triggered by
userspace.
In addition, convert Rust Binder to use them.
- 'sync' module: to construct a global 'struct ratelimit_state', add
a 'const' constructor for 'raw_spinlock_t'.
In addition, move the lockdep types into a new 'sync::lockdep'
submodule, since there were starting to be too many of them.
- 'num' module: add the 'cv!' macro to create constant values ("cv")
from an integer constant expression, with validity checked at
compile time, inferring the target type from the context. It works
for any type that implements the new 'FromConst' trait, e.g.:
let a: Alignment = cv!(4096);
let b: Bounded<u32, 4> = cv!(15);
// Any integer constant expression works, not only literals.
let m: NonZero<usize> = cv!(usize::MAX);
// Checked narrowing, including in `const` items.
const SMALL: u8 = cv!(200u32);
// The target type can be given explicitly.
let e = cv!(200u32 => u8);
// With an explicit primitive target, the expression can use
// generic parameters.
const fn as_u64<const KEY: u16>() -> u64 {
cv!(KEY => u64)
}
This avoids the verbose turbofish syntax which disincentivized
using these types at interface boundaries (e.g.
'Alignment:🆕:<8>()').
- 'alloc' module:
- Allow different error types in 'KBox::pin_slice()', enabling use
of infallible initializers.
- Add 'NumaNode::id()' accessor to retrieve the underlying NUMA
node identifier.
- 'time' module:
- Add 'Delta::to_jiffies_timeout()' for use in timeout arguments.
- Add 'Delta::as_jiffies_unsigned()'.
- Make 'Delta::ZERO' generic over the time unit.
- Warn and assert when passing out-of-range inputs to 'fsleep' and
'udelay'.
- Rename 'ClockSource' to 'ClockId' to better align with naming
conventions in C kernel.
- Make 'CONFIG_HZ' value available as 'bindings::HZ'.
- Add implementation detail documentation for 'HrTimer'.
- 'bitmap' module:
- Add contiguous area operations ('next_zero_area{,_off}', 'set'
and 'clear'), with extra checks compared to the underlying C
code, plus additional ones under 'CONFIG_RUST_BITMAP_HARDENED'.
It includes tests demonstrating the edge cases.
- Restrict bitmap length to at most 'i32::MAX', matching
'BitmapVec::MAX_LEN' and simplifying a few things. This also
fixes 'u32' casts truncating in 'copy_and_extend', which could
otherwise lead to OOB writes.
- 'bug' module:
- Fix 'warn_on!' on UML which called 'warn_slowpath_fmt()' with
the wrong arguments; and fix its '// SAFETY:' comment too.
- Add a KUnit test for 'warn_on!'.
- 'id_pool' module: add contiguous ID reservation via the new
'reserve_ids' and 'release_ids' methods, built on top of the new
bitmap area operations.
- 'sizes' module: add the sub-1K size constants ('SZ_1' to 'SZ_512')
and implement 'SizeConstants' for 'Alignment', so that one can
write e.g. 'Alignment::SZ_8'.
'macros' crate:
- Add '#[optional]' attribute for optional methods in '#[vtable]' to
replace the 'build_error!(VTABLE_DEFAULT_ERROR)' boilerplate, e.g.:
#[vtable]
pub trait Operations: Sized {
#[optional]
fn f(&self) -> Result;
}
In addition, apply it to miscdevice and hide generated 'HAS_'
constants for required methods.
- Allow non-ASCII characters in the 'authors' field of the 'module!'
macro, which was unintentionally restricted when multiple authors
support was introduced.
'pin-init' crate:
[ Extra context from Gary's pull request:
"This is a cycle packed with feature updates. Two of the most
anticipated features, tuple struct support and safe self
reference creation, has been included in this pull request.
Safe self reference is a big one and is pushed a bit late in the
cycle. The initial plan was to include a minimum subset for this
cycle because I was worried about potential soundness issues;
however during Plumbers it was agreed that the features should be
upstreamed at once. This is because the initial users (Nova,
JobQueue) would all need the advanced features, so it is better
to ensure that the feature get put into use for real, and it can
iterate with users, rather than being fully designed on paper.
The existing safety checks are already very comprehensive, and
Benno and I are confident that if new ones are discovered, it
wouldn't affect the overall design.
That said, the the usage of the advanced features (invariance,
existential lifetime) shall be limited to the pre-agreed users
only, so even in case where the feature needs to be reworked, the
blast radius is limited.
Another theme in this cycle is to improve the developer
experience when things are used wrongly. A lot of work has been
done to use proper spans from user-provided tokens so error
message point to things that cause them. Many common misuse
scenarios also gain additional custom diagnostics." ]
- User visible changes:
- Support tuple structs.
- Allow safe creation of self references.
- Vastly improve diagnostics for common misuse scenarios.
- Other changes:
- Use 'mixed_site' hygiene consistently.
'MAINTAINERS':
- Add 'RUST [BUG]' entry for the Rust 'bug' module (i.e. 'warn_on!'),
which will be maintained by FUJITA Tomonori -- thank you!
- Add Alice Ryhl as co-maintainer for 'Rust [ALLOC]'.
And some other fixes, cleanups and improvements.
* tag 'rust-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/ojeda/linux: (91 commits)
rust: zerocopy: update to v0.8.62
rust: zerocopy: fix link to upstream `README.md`
rust: id_pool: add contiguous ID reservation
rust: bitmap: add contiguous area operations
rust: sizes: implement SizeConstants for Alignment
rust: sizes: add sub-1K size constants
rust: bitmap: restrict bitmap length to at most i32::MAX
rust: bitmap: use function-level cfg on kunit test
rust: num: add cv! macro to create values from constant expressions
rust: bug: update the SAFETY comment for warn_slowpath_fmt() on UML
rust: time: add Delta::as_jiffies_unsigned()
rust: time: make Delta::ZERO generic over the time unit
rust_binder: use pr_*_ratelimited! for printing
rust: add pr_*_ratelimited! macros for printing
rust: sync: add const constructor for raw_spinlock_t
rust: sync: move lockdep types to rust/kernel/sync/lockdep.rs
rust: pin-init: internal: suppress `explicit_outlives_requirements`
MAINTAINERS: add entry for the Rust `bug` module
rust: pin-init: internal: pin_data: support existential lifetimes
rust: pin-init: internal: pin_data: support shared projection
...
|
||
|
Linus Torvalds
|
14c8977403 |
It was a reasonably busy cycle for docs; changes include:
- Add the AGENTS.md symbolic link into the top-level directory in the hopes
that LLMs will read it and produce better work.
- The removal of the Assisted-by requirement, as concluded at the
Maintainer Summit.
- A new "testdocs" make target to run the documentation unit tests.
- Lots of work on the Portuguese, and Chinese translations; there is now
maintenance for the traditional Chinese translations as well.
...and the usual pile of minor fixes, documentation updates, etc.
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Merge tag 'docs-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux
Pull documentation updates from Jonathan Corbet:
"It was a reasonably busy cycle for docs; changes include:
- Add the AGENTS.md symbolic link into the top-level directory in the
hopes that LLMs will read it and produce better work
- The removal of the Assisted-by requirement, as concluded at the
Maintainer Summit
- A new "testdocs" make target to run the documentation unit tests
- Lots of work on the Portuguese, and Chinese translations; there is
now maintenance for the traditional Chinese translations as well
...and the usual pile of minor fixes, documentation updates, etc"
* tag 'docs-7.4' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux: (125 commits)
docs: add AGENTS.md as a symlink to README
docs: kernel-parameters: adjust reserve_mem build option
docs: kernel-parameters: don't mix cmdline options & build options
docs/ja_JP: translate submitting-patches.rst (review and report tags)
docs: remove Assisted-by references
Revert "docs: landlock: fix ENOMSG condition in create_ruleset kernel-doc"
docs: kdoc: parse context_lock_struct() as struct declaration
docs: timers: hpet: Document userspace API and ioctl commands
docs: timers: hpet: Modernize file references
Documentation: sched-preemption: Add a SPDX license identifier
docs: ABI: sysfs-driver-xdata: use literal blocks for console commands
docs: ABI: sysfs-class-firmware-attributes: use literal blocks for console commands
ABI: sysfs-bus-usb: use literal block for console commands
docs/ABI: testing: aspeed-uart-routing: use literal block for console commands
docs: kernel-parameters: fix a truncated sentence for preempt=lazy
sched/doc: add a preemption model overview
docs: ABI: TMR manager: use literal blocks for console I/O
Documentation/ABI: IFS: use literal blocks for commands
ABI: sysfs-bus-pci: use literal blocks for commands
docs: translations: pt_BR: add debugging index
...
|
||
|
Linus Torvalds
|
742f62b639 |
alpha updates for v7.4
- alpha: add bounded Clipper console-log scanning - alpha: decode Clipper environmental events - alpha: decode and acknowledge Tsunami system machine checks - alpha: bound EV6 logout decoding by the processor area - alpha: describe the Tsunami system machine check frame - alpha: move Tsunami machine check handling to err_tsunami.c - alpha: fill in pc for software event samples - alpha: add HAVE_PERF_REGS and HAVE_PERF_USER_STACK_DUMP support - alpha: use user_stack_pointer() in KSTK_ESP() and dump_elf_thread() - alpha: stop storing the user stack pointer in pt_regs - alpha: fix stale user_stack_pointer() - selftests/seccomp: add Alpha support to seccomp_bpf - alpha: do not skip TLB shootdown IPIs for kthread-borrowed mms - alpha: do not clear remote MMU contexts in migrate_flush_tlb_page() - alpha: invalidate the local context in flush_icache_user_page() - alpha: invalidate the local context in flush_tlb_mm() - alpha: fix the local TLB invalidate in the UP flush_tlb_page() - alpha: fix the local TLB invalidate in flush_tlb_page() - alpha: invalidate the local context in flush_tlb_page() - alpha: only use a targeted tbi() when the target mm is really current - alpha: run check_mmu_context() from finish_arch_post_lock_switch() - alpha: load the MMU context when switch_mm() switches the current task - alpha: implement hugetlb support - alpha: align hugetlb mappings in arch_get_unmapped_area() - alpha: define granularity hint PTE bits - alpha: describe the PTE read and write enable bits - alpha: handle VM_FAULT_HWPOISON in do_page_fault() - alpha: add missing page_table_check_pte_clear() to ptep_get_and_clear() - alpha: default NR_CPUS to 32 for Wildfire - alpha: link platform help text to the alphalinux.org wiki - alpha: correct system descriptions in Kconfig help text - alpha: replace dead links in Kconfig help text - alpha: support the remaining kernel compression formats - alpha: add self-extracting compressed kernel boot stub - xz: add arch-specific tuning for alpha - alpha: select SPARSE_IRQ - alpha: select ARCH_WANT_IRQS_OFF_ACTIVATE_MM - alpha: select ARCH_WANT_LD_ORPHAN_WARN - alpha: discard .eh_frame and the relocation sections - alpha: select SYSCTL_EXCEPTION_TRACE - alpha: select ARCH_USE_MEMTEST - alpha: select HAVE_GUP_FAST - alpha: select ARCH_HAS_DEBUG_VM_PGTABLE - alpha: add ARCH_SUPPORTS_PAGE_TABLE_CHECK support - alpha: add ARCH_HAS_PTE_SPECIAL support - alpha: add HAVE_ARCH_THREAD_STRUCT_WHITELIST support - alpha: select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE - alpha: select HAVE_ARCH_COMPILER_H - alpha: select ARCH_SUPPORTS_INT128 - alpha: select ARCH_HAS_FAST_MULTIPLIER - alpha: select ARCH_SUPPORTS_ATOMIC_RMW - alpha: select EDAC_SUPPORT - alpha: select HAVE_DEBUG_KMEMLEAK - alpha: select ARCH_HAS_GCOV_PROFILE_ALL - alpha: select ARCH_HAS_UBSAN - alpha: enter hardirq context before looking up the irq descriptor - alpha: enable GENERIC_ENTRY -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTIw07U9ivnHy+tugnaDr6nZQzE/AUCatZIQgAKCRDaDr6nZQzE /AqTAP9RHaiXEn9o6NkcvCfiCLin7UUQmDb0GVBMQCO6elERWQEAoTYaCYWB0cKj wsF8DtzdXBKHZt7MKy56uiuESF7zlwk= =1yco -----END PGP SIGNATURE----- Merge tag 'alpha-for-v7.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/lindholm/alpha Pull alpha updates from Magnus Lindholm: "This completes Alpha's conversion to GENERIC_ENTRY and enables a range of kernel features through Kconfig updates, including UBSAN, gcov, kmemleak, page-table checking, fast GUP and sparse IRQs. It includes TLB and MMU context fixes prompted by glibc test-suite failures, HugeTLB support for 64KB, 512KB and 4MB pages, and fixes for poisoned-page faults and page-table checking. Machine-check handling is improved on Tsunami platforms, with bounded EV6 logout decoding, Clipper environmental event reporting and safer firmware console-log scanning. Other changes add self-extracting compressed kernels with support for all kernel compression formats, Alpha-specific XZ tuning, perf register and user-stack sampling, and Alpha support in the seccomp selftests. The series also fixes user stack-pointer reporting and IRQ entry ordering, adds 128-bit shift helpers, cleans up linker sections, and updates Kconfig help" * tag 'alpha-for-v7.4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/lindholm/alpha: (57 commits) alpha: add bounded Clipper console-log scanning alpha: decode Clipper environmental events alpha: decode and acknowledge Tsunami system machine checks alpha: bound EV6 logout decoding by the processor area alpha: describe the Tsunami system machine check frame alpha: move Tsunami machine check handling to err_tsunami.c alpha: fill in pc for software event samples alpha: add HAVE_PERF_REGS and HAVE_PERF_USER_STACK_DUMP support alpha: use user_stack_pointer() in KSTK_ESP() and dump_elf_thread() alpha: stop storing the user stack pointer in pt_regs alpha: fix stale user_stack_pointer() selftests/seccomp: add Alpha support to seccomp_bpf alpha: do not skip TLB shootdown IPIs for kthread-borrowed mms alpha: do not clear remote MMU contexts in migrate_flush_tlb_page() alpha: invalidate the local context in flush_icache_user_page() alpha: invalidate the local context in flush_tlb_mm() alpha: fix the local TLB invalidate in the UP flush_tlb_page() alpha: fix the local TLB invalidate in flush_tlb_page() alpha: invalidate the local context in flush_tlb_page() alpha: only use a targeted tbi() when the target mm is really current ... |
||
|
Nathan Chancellor
|
e580962443
|
scripts/Kconfig.toolchain: Highlight cc-option differences between Kconfig and Kbuild
Performing cc-option checks in Kconfig instead of Kbuild can help speed up incremental builds where the configuration does not change, as the results of the probes can be easily cached. However, there are two potential issues that folks need to consider when using cc-option in Kconfig compared to Kbuild. The first is that in Kbuild, cc-option additions are cumulative, so KBUILD_CFLAGS += $(call cc-option,-mfoo) KBUILD_CFLAGS += $(call cc-option,-mbar) results in '-mbar' being tested with '-mfoo' if it was supported. In Kconfig, '-mbar' would be tested without '-mfoo', which could change the result if '-mbar' depends on '-mfoo' being present, so it would need to test support with $(cc-option,-mbar -mfoo) The second is that the Kconfig stage is where questions like "is the target architecture 32-bit or 64-bit" or "is the target architecture big or little endian" are answered, which very much matters for testing compiler options. Toolchains may be configured for either option, so the kernel needs to pass compiler flags like '-m32', '-m64', '-mlittle-endian', and '-mbig-endian' to properly match a user's configuration choices. Without these flags, '-mfoo' is tested against a toolchain's configured default, resulting in an inconsistent answer to whether the flag is actually supported for the requested configuration. This could manifest as a build breakage from an unexpectedly included but unsupported flag or missing functionality from an unexpected omitted flag. Add a big comment summarizing these two issues to help future travelers. Link: https://patch.msgid.link/20261020-kconfig-fix-mfentry-check-v1-2-428258bc0fc0@kernel.org Signed-off-by: Nathan Chancellor <nathan@kernel.org> |
||
|
Nathan Chancellor
|
9a6882502d
|
kbuild: Move testing of '-mfentry' back to Makefile from Kconfig
Unlike cc-option in Kbuild, cc-option in Kconfig does not test options
with either bit ('-m32' / '-m64') or endianness ('-mbig-endian' /
'-mlittle-endian') flags because which flag to use may depend on the
result of the configuration stage. This difference changes the result of
testing for '-mfentry' support when using the kernel.org s390 cross
compiler, which is configured for 32-bit by default.
$ s390-linux-gcc -mfentry -o /dev/null -x c -c /dev/null
cc1: error: '-mfentry' is supported only for 64-bit CPUs
arch/s390/Makefile sets '-m64' in KBUILD_CPPFLAGS early, so '-mfentry'
support was properly tested before the move to Kconfig.
$ s390-linux-gcc -m64 -mfentry -o /dev/null -x c -c /dev/null
Ricardo reported another issue with moving this check from Kbuild to
Kconfig, as '-mfentry' is not supported for x86_32 without '-fno-pic',
which affects GCC builds that are configured with PIE enabled by
default. arch/x86/Makefile adds '-fno-pic' to KBUILD_CFLAGS, so this
works properly in Kbuild.
Move the '-mfentry' check back into Kbuild to avoid adding additional
complexity to the Kconfig entry.
Fixes:
|
||
|
Linus Torvalds
|
303bff3637 |
Core features:
- Remove big-endian kernel support: CONFIG_CPU_BIG_ENDIAN has depended
on BROKEN for a while, so drop the remaining code (BE hypervisor
object, BPF JIT, assembly/crypto/library routines, endianness helper
macros, selftests) and force a little-endian build
- Add preemptible this_cpu_*() operations (read/write, RMW, xchg,
cmpxchg and cmpxchg128) that no longer need to disable preemption
around the per-CPU address generation and access
- Preparation patches for implementing CONFIG_HOTPLUG_PARALLEL on
arm64
Memory management:
- Treat faults taken by EFI runtime firmware as kernel faults
- Clear PTE_WRITE for EFI_MEMORY_RO mappings (with hardware dirty state
management enabled, this is not truly read-only)
- Raise the default ARCH_MMAP_RND_BITS for 48-bit and 52-bit VA
configurations (28/26/24 bits for 4K/16K/64K pages)
- Implement clear_page[s]() using memset()
- Enable BBML2 no-abort (a.k.a. BBML3) for the NVIDIA Rigel CPU
Perf and PMU:
- Support for HiSilicon's ITS PMU
- Add support for some new events: INST_SIMD_ALU_VEC for Apple PMUs and
a cycle counter for the latest version of HiSilicon's MN PMU hardware
- A bunch of fixes to the CXL PMU driver to address pre-existing issues
from Sashiko
- Fix generation of PERF_RECORD_ITRACE_START records for SPE and ETM
drivers
- Reduce excessive stack consumption in the Marvell DDR PMU driver
- Minor driver updates and cleanups all over
Arm Confidential Compute Architecture (CCA):
- Add an Arm SMCCC bus for firmware services discovered through SMCCC
and move the TRNG and CCA guest (TSM provider) drivers onto it,
removing the dummy CCA platform device and adding a sysfs ABI for
Realm guests
- Move the Realm Service Interface (RSI) code out of arch/arm64/ into
drivers/firmware/arm_rmm/
- Add the host side of the Realm Management Interface (RMI): detect,
configure and activate the RMM, add SRO support and wrappers for the
Realm RMI commands
- Block hibernation (new arch hook in the PM core) and kexec while the
RMM is active. To be revisited in the future with proper support for
deactivation
- Handle Granule Protection Faults (GPFs) taken by the host, caused by
accesses to memory delegated to the RMM. In a future patch, the
exception table lookup will be limited to is_kdump_kernel() cases
MPAM (Memory Partitioning And Monitoring):
- Add support for the MPAM firmware-backed (Fb) interface, allowing
MSC accesses to be mediated by firmware
- Fix a list of theoretical issues with the driver (MSC access error
propagation, MBWU monitor save/restore and locking, resctrl class
handling, error interrupt restore, maximum number of PARTIDs)
- Add the mailing list and a missing file to the MAINTAINERS entry
- Document when to set arm64.nompam
Errata and CPU features:
- Add the NXP i.MX8QM/8QP workaround for the Cortex-A53 cache coherency
issue (ERR050104), using a new ARM64_CPUCAP_SOC_ERRATUM capability
type for SoC-level errata
Miscellaneous:
- Mask debug exceptions (DAIF) around the hardware breakpoint register
manipulations when called from generic kernel code
- Don't zero the SVE state buffer when the SVE state is live
- Return -EPERM instead of -EBUSY from the GCS prctl() locking
failures (matching x86), with the selftest updated. Slight ABI change
but no software deployment yet
- kselftest: fix unsound MTE fault skipping by introducing MTE-safe
memory accessors, avoid copying each signal test binary more than
once
- Update sysreg definitions (fix three enum values and two field names,
mark architecturally dropped fields as RES0) and remove the TME
transaction state check from the BRBE driver
- Fix the description of ARM64_HAS_LPA2 and remove a redundant
ID_AA64MMFR0 define
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 updates from Catalin Marinas:
"Here are the arm64 updates for 7.4.
The more interesting bits are the removal of big-endian kernel support
(already marked BROKEN for some time), preemptible this_cpu_*()
operations and MPAM support for the firmware-backed (Fb) interface.
CCA (Arm's confidential compute) is slowly trickling in with host RMI
(Realm Management Interface) support and some refactoring, including a
dedicated SMCCC bus to advertise firmware services. There are also the
usual PMU updates for new hardware and a few fixes/cleanups.
Core features:
- Remove big-endian kernel support: CONFIG_CPU_BIG_ENDIAN has
depended on BROKEN for a while, so drop the remaining code (BE
hypervisor object, BPF JIT, assembly/crypto/library routines,
endianness helper macros, selftests) and force a little-endian
build
- Add preemptible this_cpu_*() operations (read/write, RMW, xchg,
cmpxchg and cmpxchg128) that no longer need to disable preemption
around the per-CPU address generation and access
- Preparation patches for implementing CONFIG_HOTPLUG_PARALLEL on
arm64
Memory management:
- Treat faults taken by EFI runtime firmware as kernel faults
- Clear PTE_WRITE for EFI_MEMORY_RO mappings (with hardware dirty
state management enabled, this is not truly read-only)
- Raise the default ARCH_MMAP_RND_BITS for 48-bit and 52-bit VA
configurations (28/26/24 bits for 4K/16K/64K pages)
- Implement clear_page[s]() using memset()
- Enable BBML2 no-abort (a.k.a. BBML3) for the NVIDIA Rigel CPU
Perf and PMU:
- Support for HiSilicon's ITS PMU
- Add support for some new events: INST_SIMD_ALU_VEC for Apple PMUs
and a cycle counter for the latest version of HiSilicon's MN PMU
hardware
- A bunch of fixes to the CXL PMU driver to address pre-existing
issues from Sashiko
- Fix generation of PERF_RECORD_ITRACE_START records for SPE and ETM
drivers
- Reduce excessive stack consumption in the Marvell DDR PMU driver
- Minor driver updates and cleanups all over
Arm Confidential Compute Architecture (CCA):
- Add an Arm SMCCC bus for firmware services discovered through SMCCC
and move the TRNG and CCA guest (TSM provider) drivers onto it,
removing the dummy CCA platform device and adding a sysfs ABI for
Realm guests
- Move the Realm Service Interface (RSI) code out of arch/arm64/ into
drivers/firmware/arm_rmm/
- Add the host side of the Realm Management Interface (RMI): detect,
configure and activate the RMM, add SRO support and wrappers for
the Realm RMI commands
- Block hibernation (new arch hook in the PM core) and kexec while
the RMM is active. To be revisited in the future with proper
support for deactivation
- Handle Granule Protection Faults (GPFs) taken by the host, caused
by accesses to memory delegated to the RMM. In a future patch, the
exception table lookup will be limited to is_kdump_kernel() cases
MPAM (Memory Partitioning And Monitoring):
- Add support for the MPAM firmware-backed (Fb) interface, allowing
MSC accesses to be mediated by firmware
- Fix a list of theoretical issues with the driver (MSC access error
propagation, MBWU monitor save/restore and locking, resctrl class
handling, error interrupt restore, maximum number of PARTIDs)
- Add the mailing list and a missing file to the MAINTAINERS entry
- Document when to set arm64.nompam
Errata and CPU features:
- Add the NXP i.MX8QM/8QP workaround for the Cortex-A53 cache
coherency issue (ERR050104), using a new ARM64_CPUCAP_SOC_ERRATUM
capability type for SoC-level errata
Miscellaneous:
- Mask debug exceptions (DAIF) around the hardware breakpoint
register manipulations when called from generic kernel code
- Don't zero the SVE state buffer when the SVE state is live
- Return -EPERM instead of -EBUSY from the GCS prctl() locking
failures (matching x86), with the selftest updated. Slight ABI
change but no software deployment yet
- kselftest: fix unsound MTE fault skipping by introducing MTE-safe
memory accessors, avoid copying each signal test binary more than
once
- Update sysreg definitions (fix three enum values and two field
names, mark architecturally dropped fields as RES0) and remove the
TME transaction state check from the BRBE driver
- Fix the description of ARM64_HAS_LPA2 and remove a redundant
ID_AA64MMFR0 define"
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (144 commits)
arm64: cpufeature: Enable BBML2 for NVIDIA Rigel
arm64: cputype: Add NVIDIA Rigel definitions
arm64: raise default ARCH_MMAP_RND_BITS for 48-bit and 52-bit VA
arm64/debug: mask debug exceptions when called from common code
kselftest/arm64: signal: copy each test binary only once
kselftest/arm64: Check for -EPERM not -EBUSY in the locking test
arm64: gcs: Return -EPERM not -EBUSY for prctl() locking failures
perf: arm_brbe: Remove the check for TME transaction states
arm64: sysreg: Mark fields the architecture dropped as RES0
arm64: sysreg: Fix the names of two misspelt fields
arm64: sysreg: Fix three incorrect enum values
arm64: smp: Defer RCU registration during secondary CPU bringup
arm64: smp: Don't bother printing the I-cache policy for each CPU
arm64: smp: Defer update of secondary CPU capabilities
arm64: smp: Tidy up cpuinfo init and cpufeature updates
arm64: smp: Tidy up smp_prepare_cpus()
arm64: cpufeature: Store every ID register with its overrides applied
arm64: cpufeature: Read MPAMIDR_EL1 in __cpuinfo_store_cpu()
arm64: cpufeature: Add read_cpuid_with_overrides()
arm64: cpufeature: Check arm64_ftr_regs[] before the first store
...
|
||
|
Matt Turner
|
7d1b7e5670 |
xz: add arch-specific tuning for alpha
Alpha has fixed-length, 4-byte-aligned instructions and no XZ BCJ filter, so it wants the same LZMA2 settings as the other 4-byte-aligned targets. Without an entry it hits the default case, which warns scripts/xz_wrap.sh: Arch-specific tuning is missing for 'alpha' and conservatively assumes 2-byte alignment. Alpha gains HAVE_KERNEL_XZ later in this series; the correct alignment also shrinks a UP1500 kernel's XZ image from 6469320 to 6448840 bytes. Signed-off-by: Matt Turner <mattst88@gmail.com> Reviewed-by: Magnus Lindholm <linmag7@gmail.com> Tested-by: Magnus Lindholm <linmag7@gmail.com> Reviewed-by: Lasse Collin <lasse.collin@tukaani.org> Link: https://lore.kernel.org/r/20261017-alpha-kernel-compression-v2-1-c71e6b08dc63@gmail.com Signed-off-by: Magnus Lindholm <linmag7@gmail.com> |
||
|
Nathan Chancellor
|
997208ce9f
|
Merge branch 'kbuild-next-speedups' into kbuild-next
This is the first round of commits and fix-ups from Lorenzo's Kbuild speed up series. Signed-off-by: Nathan Chancellor <nathan@kernel.org> |
||
|
Nathan Chancellor
|
2b358510d5
|
kbuild: AutoFDO: Update split machine function argument for upstream rename
A recent LLVM commit [1] renamed the internal LLVM plugin option '-split-machine-functions' to '-function-splitting=all', breaking the AutoFDO + ThinLTO build with: ld.lld: error: -plugin-opt=-: ld.lld: Unknown command line argument '-split-machine-functions'. Try: 'ld.lld --help' The plugin option is needed for in-process ThinLTO, so handle the rename accordingly using ld-option. Cc: stable@vger.kernel.org Closes: https://github.com/ClangBuiltLinux/linux/issues/2186 Fixes: |
||
|
Pauli Virtanen
|
2f7f564fe3 |
Bluetooth: enable context analysis for headers
Remove context analysis suppression for include/net/bluetooth/*, now that previous commits have resolved the warnings. Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Pauli Virtanen <pav@iki.fi> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com> |
||
|
Sasha Levin
|
1e035297ff |
docs: remove Assisted-by references
Commit |
||
|
Konstantin Khorenko
|
f541906e89 |
kbuild: move GCOV flags to scripts/Makefile.gcov
* split the CFLAGS_GCOV block out of the top-level Makefile into scripts/Makefile.gcov * include it via include-$(CONFIG_GCOV_KERNEL) like neighbour KASAN/KCOV/UBSAN makefiles do * keep the include before scripts/Makefile.gcc-plugins: the try-run must not get -fplugin= options, plugins do not exist on clean builds CFLAGS_GCOV is no longer defined when CONFIG_GCOV_KERNEL is off: * its user in scripts/Makefile.lib is guarded by the CONFIG_GCOV_KERNEL * in i915/xe header an empty value is harmless The try-run compiler invocations also stop running on builds without GCOV. Link: https://lore.kernel.org/20261001-b4-prep-gcov-v1-2-794792e06f24@virtuozzo.com Signed-off-by: Konstantin Khorenko <khorenko@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Suggested-by: Peter Oberparleiter <oberpar@linux.ibm.com> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nicolas Schier <nsc@kernel.org> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Mikhail Zaslonko <zaslonko@linux.ibm.com> |
||
|
Guixin Liu
|
d25f15a76c |
checkpatch: don't flag ACQUIRE_ERR() assignments in if conditions
ACQUIRE_ERR() and its wrappers, PM_RUNTIME_ACQUIRE_ERR() and IIO_DEV_ACQUIRE_FAILED(), report whether a conditional cleanup.h guard was acquired, and drivers consume the result directly in an if condition: if ((rc = ACQUIRE_ERR(mutex_intr, &lock))) return rc; That combined form is the established style at the 49 in-tree call sites under drivers/cxl and drivers/pci/tsm.c, so ASSIGN_IN_IF fires there only as a false positive, and every patch touching those lines carries noise that reviewers have to wave off manually. Skip the check only when every assignment in the condition assigns the result of such a call, matched by the *_ACQUIRE_ERR() / *_ACQUIRE_FAILED() naming convention of its wrappers. Plain assignments, mixed conditions and near-miss identifiers still get flagged. Link: https://lore.kernel.org/20260924033923.4140210-1-kanie@linux.alibaba.com Signed-off-by: Guixin Liu <kanie@linux.alibaba.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Suggested-by: Alison Schofield <alison.schofield@intel.com> Acked-by: Joe Perches <joe@perches.com> Assisted-by: LLM Cc: Andy Whitcroft <apw@canonical.com> Cc: Jonathan Cameron <jic23@kernel.org> |
||
|
Hemanth Selam
|
392fe36dd2 |
scripts/spelling.txt: keep British spelling for "initalise"
These are the only two entries in the file that map a British spelling to an American one: initalised||initialized initalise||initialize doc-guide/checkpatch.rst asks that British and American spellings be left alone, so correcting the missing "i" should not also change the variety of English. Following checkpatch here silently rewrites "initalised" to "initialized" in files that otherwise use British forms; arch/arm64 alone has 58 uses of "initialised" against 132 of "initialized", so both are clearly in use. Map them to the British forms instead, so the misspelling is still caught while the spelling variety is left to the author. Link: https://lore.kernel.org/20260907091324.32211-1-hemanth.selam@gmail.com Signed-off-by: Hemanth Selam <hemanth.selam@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Suggested-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Randy Dunlap <rdunlap@infradead.org> Assisted-by: Cursor:claude-opus-5 Cc: Colin Ian King <colin.i.king@gmail.com> Cc: Joe Perches <joe@perches.com> Cc: Jonathan Corbet <corbet@lwn.net> |
||
|
Alan Maguire
|
42d7153fcb
|
btf: Relocate and expose module inline BTF
Module .BTF.inline is split relative to its module BTF. For external modules, module BTF can instead be split relative to a distilled .BTF.base and is relocated against vmlinux when the module loads. Parse ordinary module inline BTF relative to the pre-relocation module BTF. Retain the module relocation ID and string maps, then rebase inline type IDs and string offsets onto the final vmlinux/module BTF space before exposing the result through sysfs. Malformed or unrelocatable optional inline BTF is warned about and omitted without preventing normal module BTF registration. The btf_vmlinux_inline carrier remains on its existing hash-checked, vmalloc-backed publishing path, preserving mmap support for vmlinux.inline when delivered by a module. Signed-off-by: Alan Maguire <alan.maguire@oracle.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://patch.msgid.link/20261009112324.1442319-6-alan.maguire@oracle.com |
||
|
Alan Maguire
|
672981f4ae
|
kbuild, btf: Expose vmlinux inline BTF through sysfs
Expose BTF inline-location information from vmlinux .BTF.inline sections in /sys/kernel/btf as vmlinux.inline. Embedded vmlinux inline BTF supports read-only mmap(). Provide runtime support for a module-delivered vmlinux inline BTF carrier. Its link record binds the carrier module name, BTF size, and SHA-256 digest to the running kernel before its data is made available through a lazy vmlinux.inline sysfs attribute. The carrier is handled before ordinary module BTF registration, so its incidental .BTF data is not exposed. Make CONFIG_DEBUG_INFO_BTF_INLINE tristate. When configured as a module, retain vmlinux final split inline BTF for btf_vmlinux_inline.ko instead of embedding it in vmlinux. Reserve .BTF.inline.link in vmlinux and extend the final resolve_btfids patch pass to bind btf_vmlinux_inline to the raw vmlinux.BTF.inline payload. This preserves the normal built-in configuration while allowing the large inline BTF payload to load on demand. Normal module inline BTF is handled separately, after its references have been relocated against the final module BTF. Signed-off-by: Alan Maguire <alan.maguire@oracle.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://patch.msgid.link/20261009112324.1442319-4-alan.maguire@oracle.com |
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Petr Vorel
|
8fcc6355fe |
checkpatch: skip kernel specific checks for userspace
These check are kernel specific, do not warn about it when testing
userspace code:
* BIT_MACRO
* LONG_UDELAY
* MSLEEP
* PREFER_KERNEL_TYPES
* USLEEP_RANGE
This is a follow-up to
|
||
|
Petr Vorel
|
4b5b44b161 |
checkpatch: add --userspace to force userspace rules
Also allow to use --no-userspace for userspace projects which vendored checkpatch.pl and use --userspace globally to be able switch it off for files with kernel code. Link: https://lore.kernel.org/20260904110230.1219037-4-pvorel@suse.cz Signed-off-by: Petr Vorel <pvorel@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Whitcroft <apw@canonical.com> Cc: Dwaipayan Ray <dwaipayanray1@gmail.com> Cc: Joe Perches <joe@perches.com> Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com> |
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Petr Vorel
|
3dc89677fb |
checkpatch: ignore <inttypes.h> format macros for userspace tools
Constants from <inttypes.h> are used only in userspace tools, they are
from ISO C99, let's don't report it:
arch/mips/boot/tools/relocs.c:572: CHECK: Avoid CamelCase: <PRIx32>
arch/s390/tools/relocs.c:52: CHECK: Avoid CamelCase: <PRIu64>
tools/testing/selftests/mm/vm_util.c:244: CHECK: Avoid CamelCase: <SCNu64>
Link: https://lore.kernel.org/20260904110230.1219037-3-pvorel@suse.cz
Signed-off-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Whitcroft <apw@canonical.com>
Cc: Dwaipayan Ray <dwaipayanray1@gmail.com>
Cc: Joe Perches <joe@perches.com>
Cc: Lukas Bulwahn <lukas.bulwahn@gmail.com>
|
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Petr Vorel
|
15c6173efb |
checkpatch: add more userspace directories to is_userspace()
Patch series "checkpatch: userspace improvements", v6.
Few improvements for user space code + --userspace option for projects
which vendored checkpatch.pl.
There could be probably more checks which are kernel space only.
This patch (of 4):
arch/ directory contains subdirectories with userspace tools (at least
arch/*/tools/ and arch/*/boot/tools/). Add check to consider any
arch/.*/tools/ subdirectory as userspace tools directory.
This helps not only to strscpy() checks but also to CamelCase checks in
the next commit to be more precise.
This is a follow-up to
|
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|
Kees Cook
|
ae5f6044c4
|
kbuild: Mark the initcall ordering recipe as recursive
generate_initcall_order.pl, which orders initcalls for Clang LTO, forks a child per input file, up to the job count scripts/jobserver-exec passes it in PARALLELISM. It used to run from link-vmlinux.sh, which the top-level Makefile invokes as a recursive recipe, but commit |
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|
Aaron Tomlin
|
46d4ccf3b6
|
localmodconfig: Explicitly report boolean configs during integrity check
When running make localmodconfig, streamline_config.pl reads loaded
modules and maps each module object to its corresponding Kconfig
symbol(s) using repository Makefiles.
In several instances, a loaded module corresponds to an object
controlled by a boolean symbol (e.g. config FOO declared as bool), or is
a composite module that depends on a boolean configuration. Because
boolean options only accept "=y" or disabled, they cannot be configured
as loadable modules ("=m").
Previously, if such a symbol was not already built-in ("=y") in the
baseline configuration, the final integrity check emitted an ambiguous
diagnostic. For example
foo did not have configs CONFIG_FOO
Further investigation is required by developers to determine whether the
module was out-of-tree, its dependencies were unmet, or it failed due to
a type constraint. Address this by:
1. Tracking symbol types in a %types hash during Kconfig parsing.
2. Enhancing the final integrity check when running localmodconfig
(!$localyesconfig) to explicitly annotate boolean symbols.
For example:
module cec did not have configs CONFIG_CEC_CORE (tristate) CONFIG_RAS_CEC (boolean, not supported with =m)
Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Link: https://patch.msgid.link/20260925181230.130525-1-atomlin@atomlin.com
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
|
||
|
Ting-Han Hou
|
3bf2237f59
|
scripts/make_fit: Ignore schema checks when decomposing DTBs
With CHECK_DTBS enabled, Kbuild appends a schema validation command to
the fdtoverlay command saved in a composite DTB's .cmd file. When DTB
decomposition is requested, process_dtb() treats every word after -i as
an input file, including the semicolon and the validator arguments.
FIT generation then fails with FileNotFoundError while opening or
checking the size of those words as files.
Limit the input list to the fdtoverlay command before extracting its
arguments. This preserves the base DTB and overlay order and ignores
the subsequent schema validation command.
Fixes:
|
||
|
Ting-Han Hou
|
d26ab84593
|
clang-tools: Import os for broken pipe handling
The BrokenPipeError handler in run-clang-tools.py calls os.open() and
os.dup2() without importing os. If this handler is reached, it raises
NameError instead of redirecting stdout and exiting with status 1.
Import os so the handler can work as intended.
Fixes:
|
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|
Leizhen Zhang
|
a8f72a75b3
|
kconfig: use the value argument in sym_get_near_range_bound()
sym_get_near_range_bound() is meant to check whether the given value is outside of the active range of an int/hex symbol, and is called with the symbol's current value from sym_calc_value() and with the default value from sym_get_string_default(). Since commit |
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|
Leizhen Zhang
|
52f26261e2
|
kconfig: fix infinite loop in conf_choice() when no choice value is visible
If a choice is visible but none of its choice values is, conf_choice()
counts cnt == 0 visible values and finds no default. When the choice has
to be asked, e.g. because a new symbol was added to the same menu
(oldconfig, syncconfig) or because stdin is at EOF (oldaskconfig), the
loop that maps the answer to a menu entry never finds one and the
while (1) loop repeats forever, printing "choice[1-0?]: 0" each time.
This happens in the tree for s390 when the compiler supports none of the
-march=z* options (e.g. a non-s390 host compiler), so that all values of
the "Processor type" choice are invisible:
$ make ARCH=s390 defconfig
$ sed -i '/^CONFIG_NR_CPUS=/d' .config
$ make ARCH=s390 oldconfig # hangs
Before the removal of tristate choice support, conf_choice() returned
early in this case. Do the same when there is no visible choice value.
Found by fuzzing Kconfig input with ASan/UBSan.
Fixes:
|
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Julian Braha
|
2160297cab
|
kconfig: cleanup stale comment about 'keys' array
'keys' was removed from 'dialog_textbox' in:
commit
|
||
|
Nathan Chancellor
|
7202c08793
|
kconfig: Improve ergonomics around disabling warnings with cc-option
This is essentially a port of commit
|
||
|
Nathan Chancellor
|
c4c24fd63a
|
scripts/Kconfig.toolchain: Drop compiler symbols from dependencies
Commit
|
||
|
Ting-Han Hou
|
72a61a7fef
|
checkkconfigsymbols.py: Parse Git status output line by line
tree_is_dirty() iterates over the string returned by execute() one
character at a time. Its status check therefore examines filenames as
well as the two status columns.
An otherwise clean tree containing an untracked README is reported as
dirty because its name contains letters matched by [URMADC]. This
prevents --commit and --diff from running, whereas an untracked
notes.txt does not trigger the check.
Split the output into lines before examining the two status columns so
that filenames do not affect the dirty-tree check.
Fixes:
|
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Leizhen Zhang
|
c8dd1aa027
|
gen_init_cpio: stop parsing on lines with a missing argument list
When a line in the cpio list consists of a file type followed only by
whitespace and no newline (e.g. "slink " as the last line of the file),
strtok(NULL, "\n") returns NULL. main() prints an error and sets ec, but
then carries on and passes the NULL args pointer to the type handler,
which hands it to sscanf() and crashes:
AddressSanitizer: SEGV on unknown address 0x000000000000
#4 __isoc99_sscanf
#5 cpio_mkslink_line usr/gen_init_cpio.c:169
Break out of the loop as is already done for the other format error, so
that the error is reported and gen_init_cpio exits with a failure status.
Found by fuzzing gen_init_cpio built with ASan/UBSan.
Reproducer:
printf 'slink ' > list && usr/gen_init_cpio list
Fixes:
|
||
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Nick Desaulniers
|
4975fb231f |
scripts/checkstack.pl: support llvm-objdump disassembly for x86
When running `make LLVM=1 checkstack`, OBJDUMP is set to llvm-objdump. llvm-objdump outputs disassembly with instruction size suffixes (such as subq/addq/subl/addl), tabs/whitespace differences, spaces after commas, and trailing comments (e.g. `# imm = 0x...`). Because scripts/checkstack.pl used rigid regular expressions specifically tuned to GNU objdump format (e.g. requiring exactly four spaces, no suffix, and no space after comma), checkstack.pl failed to match any stack adjustment instructions and yielded no output when using llvm-objdump on x86. Update the regular expressions for x86 to match optional suffixes, variable whitespace, and trailing comments. Link: https://lore.kernel.org/20260902-checkstack_llvm_objdump-v1-1-edb4eca5f163@google.com Signed-off-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Assisted-by: LLM Gemini Cc: Bill Wendling <morbo@google.com> Cc: Justin Stitt <justinstitt@google.com> Cc: Nathan Chancellor <nathan@kernel.org> |
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|
Petr Vorel
|
d41ebc7f9e |
checkpatch: skip CamelCase cache for --no-tree without root
Running outside tree (--no-tree) without git root (--root DIR) is not doable because we have no include/ directory which could be cached. But |
||
|
Muchun Song
|
48070b721a |
mm/sparse: relax struct mem_section size constraints
Patch series "mm: Introduce section-based vmemmap optimization for
HugeTLB", v6.
This series is split out from the earlier, larger series "mm: Generalize
HVO for HugeTLB and device DAX" [1]. While the parent series generalizes
vmemmap optimization across HugeTLB and device DAX, this subset addresses
a single, self-contained step: making the generic sparse-vmemmap code
section-based optimization aware and switching HugeTLB bootmem pages to
this path.
HugeTLB vmemmap optimization currently has its own early boot setup path.
It pre-populates optimized vmemmap mappings before the normal
sparse-vmemmap population code runs, and sparsemem carries
SPARSEMEM_VMEMMAP_PREINIT only to support that special case.
That makes the HugeTLB vmemmap optimization path harder to share with
other users of sparse-vmemmap optimization and leaves a fair amount of
HugeTLB-specific boot-time state in the generic memory initialization
flow.
This series introduces section-based vmemmap optimization support in the
sparse-vmemmap code and switches HugeTLB bootmem pages over to it.
Instead of having HugeTLB pre-populate optimized vmemmap mappings itself,
HugeTLB now records the compound page order in the corresponding memory
sections. The generic sparse-vmemmap population path can then allocate or
reuse shared tail vmemmap pages based on section metadata.
The patches are organized as follows:
- patches 1-2 prepare sparsemem and vmemmap optimization metadata
- patches 3-8 teach the common sparse-vmemmap paths to use that state
- patches 9-10 switch HugeTLB bootmem optimization to the
section-based path
- patches 11-17 clean up sparsemem and HugeTLB bootmem code that is no
longer needed after the conversion
This is intended to be the second smaller step toward the broader HVO
generalization. The device DAX conversion and the wider HVO consolidation
are left for follow-up series.
This patch (of 17):
struct mem_section is currently forced to a power-of-2 size so the
section-to-root lookup can use a mask instead of a modulo.
That requirement makes future extensions harder than necessary: adding a
small field can require configuration-dependent padding or layout checks
just to preserve the lookup scheme. Keep the lookup correct for any
struct mem_section size by using a plain modulo instead.
Do not leave the layout entirely unconstrained, though. Keep struct
mem_section double-word aligned so modest size changes, such as adding
another word-sized field on 64-bit systems, still keep a compact and
efficient layout. If future fields grow the structure beyond that sweet
spot, the lookup remains correct; only the exact layout efficiency
changes.
Link: https://lore.kernel.org/20260910063256.64386-2-songmuchun@bytedance.com
Link: https://lore.kernel.org/all/20260513130542.35604-1-songmuchun@bytedance.com/ [1]
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
Cc: David Laight <david.laight.linux@gmail.com>
Cc: Liam R. Howlett <liam@infradead.org>
Cc: Lorenzo Stoakes <ljs@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@kernel.org>
Cc: Qi Zheng <qi.zheng@linux.dev>
|
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|
Qi Xi
|
dc954a916d |
mm: drop stale MAX_ORDER references
The treewide rename in commit
|
||
|
Gary Guo
|
a41ec2936d |
rust: doctest: generate Rust kunit test suites
For doctest, instead of generating C FFI functions, generate a Rust test suite with `#[kunit_tests]` and `#[test]` attributes. This makes the C glue no longer needed. Reviewed-by: David Gow <david@davidgow.net> Signed-off-by: Gary Guo <gary@garyguo.net> Link: https://patch.msgid.link/20260902-kunit-v2-3-eda3ed6c00c5@garyguo.net [ Removed generated file from `rust/.gitignore` and added it to `scripts/remove-stale-files`. - Miguel ] Signed-off-by: Miguel Ojeda <ojeda@kernel.org> |