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v7.3-rc1
6962 Commits
| Author | SHA1 | Message | Date | |
|---|---|---|---|---|
Linus Torvalds
|
18fbf5151d |
mm.git review status for linus..mm-stable
Everything: Total patches: 171 Reviews/patch: 1.83 Reviewed rate: 82% Excluding selftests: Total patches: 149 Reviews/patch: 1.77 Reviewed rate: 80% Excluding selftests and maple_tree: Total patches: 129 Reviews/patch: 1.99 Reviewed rate: 89% Summary of patch series in this merge: - "mm/rmap: index MAP_PRIVATE file-backed folios by anonymous pgoff" (Lorenzo Stoakes): Index MAP_PRIVATE file-backed folios by their anonymous page offset to resolve confusion around reverse mapping for zeroed and CoW'd file-backed memory. Use this new VMA anonymous page offset tracking to eliminate index conflicts and lay the foundation for scalable CoW performance improvements. - "promote mapped executable folios after first usage for MGLRU" (Baolin Wang): Make MGLRU's protection of mapped executable file folios more reliable. Follow the classical LRU's logic, promoting mapped executable file folios after their first usage to give executable code a better chance to stay in memory and improve workload performance. - "mm: vmscan: fix node reclaim ignoring swappiness parameter" (Ridong Chen): Fix per-node proactive reclaim interface's ignoring the swappiness parameter when CONFIG_MEMCG is disabled by consolidating sc_swappiness() into a single function that checks proactive_swappiness regardless of kernel configuration. - "mm/vmscan: reduce lru_lock contention via vmstat-derived scan-balance cost" (Usama Arif): Reduce lru_lock contention in the reclaim path by deriving scan-balance costs from vmstat counters rather than lock-acquired producer updates. Read and decay these cost signals on the reclaim side under a dedicated per-lruvec lock, reducing total LRU lock wait time by over 60% without impacting scan throughput. - "zram: fix zram issues reported by sashiko" (Sergey Senozhatsky): Fix two low-risk zram bugs which Sashiko spotted in drive-by review. - "Honor XA_FLAGS_ACCOUNT in xas_split_alloc() and charge to folio's memcg" (Zi Yan): Fix xas_split_alloc() by enabling target folio memcg charging during splits and adding the missing __GFP_ACCOUNT flag for proper XArray node memory accounting. - "selftests/mm: use pattern matching in .gitignore" (Pratyush Mallick): Replace hardcoded binary names in selftests/mm/.gitignore with a generic pattern-matching rule to automatically ignore generated test files and avoid manual updates when adding new tests. - "mm/page_ext: remove pgdat_page_ext_init()" (Sang-Heon Jeon): Make the incompatibility between FLATMEM and NUMA explicit in mm/Kconfig and remove the unused pgdat_page_ext_init() function. - "zram: fix zstd error paths and add parameter validation" (Haoqin Huang): Clean up zram compression backends by removing redundant error cleanup, adding parameter and dictionary validation, auto-prefixing algorithm error logs, and resetting parameters prior to reinitialization. - "zram: fix stale scan bounds after reinitialization" (Longlong Xia): Prevent out-of-bounds slot accesses during concurrent zram resets by moving table scan bound calculations under dev_lock in writeback_store() and read_block_state(). - "add anon mTHP collapse test cases" (Baolin Wang): Extend selftests helper functions to support arbitrary page orders and add new test cases and options for mTHP collapse in khugepaged. - "selftests/mm: Handle unsupported and transient test conditions" (Muhammad Usama Anjum): Update MM selftests to report a SKIP status instead of a failure when required kernel or filesystem features are unsupported, while adding retry logic for transient page migration errors. - "mm/zswap: Fixes and improves the zswap shrink" (Hao Jia): Fix the missing zswap global shrinker when CONFIG_MEMCG is disabled and extend shrink_memcg() to support batch writeback for improved writeback efficiency. - "alloc_tag: introduce IOCTL-based filtering for MAP" (Suren Baghdasaryan): Introduce an IOCTL-based binary interface for memory allocation profiling that enables kernel-side filtering before per-CPU counter aggregation. This eliminates the text-parsing overhead of /proc/allocinfo and provides up to a 20x speedup by transferring only filtered allocation data to userspace. - "better block swap batching and a different take on swap_ops v5" (Christoph Hellwig): Refactor block swap I/O to use swap_iocb for batching instead of single-bio requests and rebase the swap_ops interface, achieving faster swap throughput during kernel builds. - "mm: kmemleak: reduce transient false positives by confirming leaks" (Catalin Marinas): Reduce false-positive kmemleak reports by combining two kmemleak enhancements that add a second confirmation scan and a configurable minimum unreferenced scan count module parameter. - "mm: kmemleak: default min_unref_scans to 2 for verbose kernels" (Breno Leitao): Auto-scanning kernels can generate false-positive memory leak reports on single scans, so this patch defaults min_unref_scans to 2 when CONFIG_DEBUG_KMEMLEAK_VERBOSE is enabled to require a second confirming scan. - "swap_ops updates" (Christoph Hellwig): Batching I/O for synchronous swap devices causes performance regressions and filesystem-based swap suffers from double-indirection overhead. This series resolves both issues by reintroducing per-folio writes for synchronous swap and allowing filesystems to directly export their own swap_ops. - "mm/khugepaged: several cleanups" (Nico Pache): khugepaged accumulated redundant state-checking patterns and outdated comments following mTHP integration. Introduce dedicated helpers for PTE validation and event counting while refreshing the internal documentation. - "maple_tree: lock checking and clean ups" (Liam Howlett): Syzbot reports incorrectly blame memory management exit paths for locking bugs, maple tree erase operations risk allocation failures without gfp flags and internal documentation lacks clarity. Improve lock error detection, update docs, fix race and allocation edge cases and optimize erase allocations using a fallback to GFP_KERNEL | GFP_NOFAIL. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQTTMBEPP41GrTpTJgfdBJ7gKXxAjgUCao9nJQAKCRDdBJ7gKXxA jk/9AQDlfevYJuSJmzAI8bt8ISG+/TfXMtIZC/MdbHqtQVYWPQD8Cvm3DUZsdGB/ Gloq/HBFuMPgE8p2pwUIthdgnTPNvAc= =c+Nb -----END PGP SIGNATURE----- Merge tag 'mm-stable-2026-08-26-15-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull more MM updates from Andrew Morton: - "mm/rmap: index MAP_PRIVATE file-backed folios by anonymous pgoff" (Lorenzo Stoakes) Index MAP_PRIVATE file-backed folios by their anonymous page offset to resolve confusion around reverse mapping for zeroed and CoW'd file-backed memory. Use this new VMA anonymous page offset tracking to eliminate index conflicts and lay the foundation for scalable CoW performance improvements. - "promote mapped executable folios after first usage for MGLRU" (Baolin Wang) Make MGLRU's protection of mapped executable file folios more reliable. Follow the classical LRU's logic, promoting mapped executable file folios after their first usage to give executable code a better chance to stay in memory and improve workload performance. - "mm: vmscan: fix node reclaim ignoring swappiness parameter" (Ridong Chen) Fix per-node proactive reclaim interface's ignoring the swappiness parameter when CONFIG_MEMCG is disabled by consolidating sc_swappiness() into a single function that checks proactive_swappiness regardless of kernel configuration. - "mm/vmscan: reduce lru_lock contention via vmstat-derived scan-balance cost" (Usama Arif) Reduce lru_lock contention in the reclaim path by deriving scan-balance costs from vmstat counters rather than lock-acquired producer updates. Read and decay these cost signals on the reclaim side under a dedicated per-lruvec lock, reducing total LRU lock wait time by over 60% without impacting scan throughput. - "zram: fix zram issues reported by sashiko" (Sergey Senozhatsky) Fix two low-risk zram bugs which Sashiko spotted in drive-by review. - "Honor XA_FLAGS_ACCOUNT in xas_split_alloc() and charge to folio's memcg" (Zi Yan) Fix xas_split_alloc() by enabling target folio memcg charging during splits and adding the missing __GFP_ACCOUNT flag for proper XArray node memory accounting. - "selftests/mm: use pattern matching in .gitignore" (Pratyush Mallick) Replace hardcoded binary names in selftests/mm/.gitignore with a generic pattern-matching rule to automatically ignore generated test files and avoid manual updates when adding new tests. - "mm/page_ext: remove pgdat_page_ext_init()" (Sang-Heon Jeon) Make the incompatibility between FLATMEM and NUMA explicit in mm/Kconfig and remove the unused pgdat_page_ext_init() function. - "zram: fix zstd error paths and add parameter validation" (Haoqin Huang) Clean up zram compression backends by removing redundant error cleanup, adding parameter and dictionary validation, auto-prefixing algorithm error logs, and resetting parameters prior to reinitialization. - "zram: fix stale scan bounds after reinitialization" (Longlong Xia) Prevent out-of-bounds slot accesses during concurrent zram resets by moving table scan bound calculations under dev_lock in writeback_store() and read_block_state(). - "add anon mTHP collapse test cases" (Baolin Wang) Extend selftests helper functions to support arbitrary page orders and add new test cases and options for mTHP collapse in khugepaged. - "selftests/mm: Handle unsupported and transient test conditions" (Muhammad Usama Anjum) Update MM selftests to report a SKIP status instead of a failure when required kernel or filesystem features are unsupported, while adding retry logic for transient page migration errors. - "mm/zswap: Fixes and improves the zswap shrink" (Hao Jia) Fix the missing zswap global shrinker when CONFIG_MEMCG is disabled and extend shrink_memcg() to support batch writeback for improved writeback efficiency. - "alloc_tag: introduce IOCTL-based filtering for MAP" (Suren Baghdasaryan) Introduce an IOCTL-based binary interface for memory allocation profiling that enables kernel-side filtering before per-CPU counter aggregation. This eliminates the text-parsing overhead of /proc/allocinfo and provides up to a 20x speedup by transferring only filtered allocation data to userspace. - "better block swap batching and a different take on swap_ops v5" (Christoph Hellwig) Refactor block swap I/O to use swap_iocb for batching instead of single-bio requests and rebase the swap_ops interface, achieving faster swap throughput during kernel builds. - "mm: kmemleak: reduce transient false positives by confirming leaks" (Catalin Marinas) Reduce false-positive kmemleak reports by combining two kmemleak enhancements that add a second confirmation scan and a configurable minimum unreferenced scan count module parameter. - "mm: kmemleak: default min_unref_scans to 2 for verbose kernels" (Breno Leitao) Auto-scanning kernels can generate false-positive memory leak reports on single scans, so this patch defaults min_unref_scans to 2 when CONFIG_DEBUG_KMEMLEAK_VERBOSE is enabled to require a second confirming scan. - "swap_ops updates" (Christoph Hellwig) Batching I/O for synchronous swap devices causes performance regressions and filesystem-based swap suffers from double-indirection overhead. This series resolves both issues by reintroducing per-folio writes for synchronous swap and allowing filesystems to directly export their own swap_ops. - "mm/khugepaged: several cleanups" (Nico Pache) khugepaged accumulated redundant state-checking patterns and outdated comments following mTHP integration. Introduce dedicated helpers for PTE validation and event counting while refreshing the internal documentation. - "maple_tree: lock checking and clean ups" (Liam Howlett) Syzbot reports incorrectly blame memory management exit paths for locking bugs, maple tree erase operations risk allocation failures without gfp flags and internal documentation lacks clarity. Improve lock error detection, update docs, fix race and allocation edge cases and optimize erase allocations using a fallback to GFP_KERNEL | GFP_NOFAIL. * tag 'mm-stable-2026-08-26-15-22' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (172 commits) selftests/proc: make proc-maps-race work with READ_IMPLIES_EXEC memcg: move LRU size accounting on reparenting instead of copying it mm/vmscan: fix comment logic in balance_pgdat maple_tree: add helper mas_make_walkable() maple_tree: avoid extra gap calculation maple_tree: fix argument name in header maple_tree: change two GFP flags in tests maple_tree: document erase and allocations better maple_tree: avoid mas_erase() and mtree_erase() failures maple_tree: document that erase may use GFP_KERNEL for allocations maple_tree: catch race in mas_alloc_cyclic() maple_tree: add bulk parent set helper maple_tree: micro optimisation of mas_wr_store_type() maple_tree: optimise mas_wr_node_store() when not in rcu mode maple_tree: use prefetched value in mas_wr_store_type() maple_tree: clarify comments on mas_nomem() maple_tree: drop MAPLE_ALLOC_SLOTS maple_tree: drop dead code from mas_extend_spanning_null() maple_tree: documentation fix maple_tree: add write lock checking with lockdep sequence numbers ... |
||
|
Linus Torvalds
|
85671b807f |
More power management updates for 7.3-rc1
- Fix a kernel panic during PMU unbind in the intel_rapl power capping
driver and sign-extend the PMU delta on counter wraparound in it to
avoid misreporting energy (Sumeet Pawnikar and Yifan Li)
- Unblock runtime PM when device prepare fails that was not done by
mistake (Shibo Zhu)
- Fix possible rate limit overflow on 32-bit systems in the schedutil
cpufreq governor (Hui Su)
- Consolidate HWP P-states initialization in the intel_pstate cpufreq
driver and make that driver avoid using the DESIRED_PERF HWP hint
when the Dynamic Efficiency Control (DEC) is enabled in the processor
to avoid inconsistent behavior (Rafael Wysocki)
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Merge tag 'pm-7.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"These fix two issues in the intel_rapl power capping driver, fix a
potential issue in the schedutil cpufreq governor on 32-bit systems,
fix a runtime PM issue related to failing system suspend, and update
the intel_pstate cpufreq driver:
- Fix a kernel panic during PMU unbind in the intel_rapl power
capping driver and sign-extend the PMU delta on counter wraparound
in it to avoid misreporting energy (Sumeet Pawnikar and Yifan Li)
- Unblock runtime PM when device prepare fails that was not done by
mistake (Shibo Zhu)
- Fix possible rate limit overflow on 32-bit systems in the schedutil
cpufreq governor (Hui Su)
- Consolidate HWP P-states initialization in the intel_pstate cpufreq
driver and make that driver avoid using the DESIRED_PERF HWP hint
when the Dynamic Efficiency Control (DEC) is enabled in the
processor to avoid inconsistent behavior (Rafael Wysocki)"
* tag 'pm-7.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
powercap: intel_rapl: Fix kernel panic during PMU unbind
PM: sleep: Unblock runtime PM when device prepare fails
powercap: intel_rapl: Sign-extend the PMU delta on counter wraparound
cpufreq: intel_pstate: Avoid using DESIRED_PERF when DEC is enabled
cpufreq: intel_pstate: Consolidate HWP P-states initialization
cpufreq: schedutil: Fix rate limit overflow
|
||
|
Linus Torvalds
|
93e4b3076b |
Char/Misc/IIO/etc driver update for 7.3-rc1
Here is the big set of char, misc, iio, counter, fpga, and other small
driver subsystems for 7.3-rc1.
Overall, due to some driver removals we only added a bit more code than
removed, which was a nice change. Highlights in this merge request are:
- Loads of IIO driver updates and additions
- binder driver updates (more on that below...)
- Removal of the SGI XP and GRU drivers as they are not used anymore
and turn out to be pretty insecure overall
- Removal of the obsolete ibmasm driver as it's not being used anymore
- Coresight driver updates and additions
- Mei driver udpates
- Counter driver updates
- FPGA driver updates
- ICC driver updates
- lots and lots of other tiny driver updates to resolve reported
issues
All of these have been in linux-next for a while, with the only reported
issues being some major merge conflicts. Miguel pointed out some of
these with the Rust tree merge, which is the majority of them. I'll
follow up with a diffstat of the merge resolution I made against your
most recent tree, which works for me.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc/IIO/etc driver updates from Greg KH:
"Here is the big set of char, misc, iio, counter, fpga, and other small
driver subsystems for 7.3-rc1.
Overall, due to some driver removals we only added a bit more code
than removed, which was a nice change. Highlights in this merge
request are:
- Loads of IIO driver updates and additions
- binder driver updates (more on that below...)
- Removal of the SGI XP and GRU drivers as they are not used anymore
and turn out to be pretty insecure overall
- Removal of the obsolete ibmasm driver as it's not being used
anymore
- Coresight driver updates and additions
- Mei driver udpates
- Counter driver updates
- FPGA driver updates
- ICC driver updates
- lots and lots of other tiny driver updates to resolve reported
issues
All of these have been in linux-next for a while"
* tag 'char-misc-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (513 commits)
iio: chemical: atlas-sensor: use iio_trigger_poll_nested() to fix remove UAF
iio: adc: pac1921: fix wrong channel used in trigger handler read
iio: light: gp2ap002: re-enable irq if runtime suspend fails
iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes
iio: light: apds9306: fix PM reference leak in apds9306_read_data()
iio: gyro: mpu3050: fix sign of raw angular velocity readings
iio: srf04: fix pm_runtime handling on probe error path
iio: adc: ad4080: configure backend data size
iio: adc: adi-axi-adc: add data size support for AD408X backend
iio: chemical: atlas-sensor: fix PM reference leak in buffer postenable
iio: dac: ad5446: fix OF module device table
iio: light: opt4001: Fix reversed GENMASK() arguments in fault count mask
iio: light: opt4001: Reject integration times with a non-zero seconds part
iio: light: opt4001: Fix incompatible pointer type passed to div_u64_rem()
iio: light: opt4001: Fix power down clearing bits of the wrong register
iio: light: opt4060: Fix incorrect register name in threshold read error message
iio: light: opt4060: Fix pointer type passed to div_u64_rem()
iio: light: opt4060: Reject integration times with a non-zero seconds part
iio: light: ltrf216a: fix runtime PM reference leak in error path
iio: pressure: dps310: fix NULL pointer dereference on ACPI probe
...
|
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Mike Rapoport (Microsoft)
|
3774c56cc3 |
drivers/base, mm: move arch_numa.c to mm/
arch_numa.c implements boot time discovery and initialization of NUMA topology on architectures that select GENERIC_ARCH_NUMA (currently arm64 and riscv). Since this is step in the initialization of the memory management subsystem, it's logical to have arch_numa.c in mm/ alongside numa.c, numa_memblks.c and numa_emulation.c. Move arch_numa.c to mm/ and add its F: entry to "MEMBLOCK AND MEMORY MANAGEMENT INITIALIZATION" in MAINTAINERS. Link: https://lore.kernel.org/20260806-arch-numa-v1-1-968ec128121e@kernel.org Signed-off-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Lorenzo Stoakes (ARM) <ljs@kernel.org> Acked-by: Vlastimil Babka (SUSE) <vbabka@kernel.org> Acked-by: David Hildenbrand (Arm) <david@kernel.org> Acked-by: Danilo Krummrich <dakr@kernel.org> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexandre Ghiti <alex@ghiti.fr> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Liam R. Howlett <liam@infradead.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Palmer Dabbelt <palmer@dabbelt.com> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
||
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Linus Torvalds
|
ed3b875bea |
mm.git review status for mm-hotfixes-stable..mm-stable
Everything:
Total patches: 501
Reviews/patch: 1.66
Reviewed rate: 70%
Excluding DAMON:
Total patches: 356
Reviews/patch: 2.26
Reviewed rate: 90%
Excluding DAMON and selftests:
Total patches: 329
Reviews/patch: 2.31
Reviewed rate: 92%
Excluding DAMON, selftests and maple_tree:
Total patches: 328
Reviews/patch: 2.31
Reviewed rate: 92%
Summary of patch series in this merge:
- The 2 patch series "mm: drop "sub" prefix from various places" from
Dev Jain implements some page->folio conversion and a naming cleanup.
- The 2 patch series "mm/kasan: remove redundant initialization for
kasan_flag_write_only" from Igor Putko provides some KASAN cleanup work.
- The 2 patch series "mm/filemap: reduce unnecessary xarray lookups"
from Chi Zhiling provides a small speedup in the pagecaache read code.
- The 4 patch series "mm/percpu: Fix possible NOFS/NOIO reclaim
recursion" from Kaitao Cheng improves a few things in the vmalloc code -
mainly the avoidance of GFP_KERNEL allocations when the caller asked for
GFP_NOFS or GFP_NOIO.
- The 3 patch series "mm/kmemleak: avoid soft lockup when scanning task
stacks" from Breno Leitao avoids a soft lockup watchdog trigger from the
kmemleak scanning code in extreme situations.
- The 6 patch series "mm/page_owner: misc cleanups" from Ye Liu is a
collection of unrelated cleanups to the page_owner code. For some
reason lots of people have been working on the page_owner code this
cycle.
- The 4 patch series "mm: convert to walk_page_range_vma() to eliminate
find_vma()" from Kefeng Wang simplifies and accelerates the page walking
library function.
- The 3 patch series "mm/migrate: preparatory cleanups for batch copy
and offload" from Shivank Garg implements cleanups in the migration
code.
- The 4 patch series "mm/page_owner: add per-fd filter infrastructure
for print_mode and NUMA filtering" from Zhen Ni provides per-fd
filtering to page_owner in order to reduce the sometimes vast amount of
output it can produce.
- The 19 patch series "mm: Refactor bootmem gigantic hugepage
allocation" from Muchun Song is a "set of fixes and preparatory cleanups
around bootmem HugeTLB handling, sparse initialization ordering, and
related vmemmap setup".
- The 4 patch series "mm/zsmalloc: reduce lock contention in zs_free()"
from Wenchao Hao reduces lock contention in zs_free(), which dominates
the unmap path under memory pressure on Android (LMK kills) and on x86
servers running zswap-heavy workloads. Up to 1.83x improvement in
microbenchmarking.
- The 2 patch series "move alloc_tag.c file under mm/" from Suren
Baghdasaryan does that.
- The 6 patch series "samples/damon: handle damon_{start,stop}()
failures" from SJ Park fixes improper handling of damon_start(),
damon_stop(), and damon_call() failures across DAMON sample modules to
prevent potential memory leaks, operation disruptions and use-after-free
bugs.
- The 11 patch series "mm/damon/sysfs: kobject_del() directories that
users can create/remove" from SJ Park resolves an issue where delayed
sysfs directory removal under CONFIG_DEBUG_KOBJECT_RELEASE causes
creation failures due to duplicate directory names by adding missing
kobject_del() calls before creating new directories.
- The 3 patch series "mm: cleanup clear_not_present_full_ptes()" from
David Hildenbrand cleans up the core pte handling code.
- The 3 patch series "selftests/damon: misc fixes for test bugs" from
Kunwu Chan fixes several bugs in the DAMON selftests.
- The 2 patch series "selftests/damon: fix memcg_path staging handling"
from Cheng Nie fixes a bug in _damon_sysfs.py for damos_filter
memcg_path setup, and adds a test case for it in sysfs.py.
- The 2 patch series "selftests/damon: test kdamond refresh_ms" from
Ruslan Valiyev introduces selftest coverage for DAMON's refresh_ms sysfs
feature by updating the test control module and verifying that scheme
stats update automatically without manual intervention.
- The 5 patch series "mm/damon: five misc fixups" from Akinobu Mita
contains miscellaneous DAMON fixups.
- The 2 patch series "mm/damon/core: detect internal variation above
max_nr_regions/2" from Jiayuan Chen fixes DAMON's region splitting
behavior when region counts exceed half the maximum budget by
dynamically scaling down the split fraction as the limit approaches,
preventing large regions from staying un-split, and adds corresponding
KUnit test coverage.
- The 6 patch series "mm: preparatory patches for PMD level swap
entries" from Usama Arif refactors and cleans up PMD softleaf helpers,
call sites, and architecture flags to lay the groundwork for a follow-up
series that introduces PMD page table swap entries.
- The 11 patch series "mm/damon: update, optimize, and clean up doc,
tests, and code" from SJ Park updates DAMON design and ABI
documentation, expands unit and selftest coverage, optimizes
damon_commit_target_regions(), and cleans up recently added sysfs
interface code for better readability.
- The 2 patch series "mm/vmpressure: reduce CPU, memory and code
overhead on cgroup v2" from Usama Arif optimizes vmpressure() by
skipping unnecessary work on cgroup v2 for userspace event notifications
and refactors v1-only eventfd handling into mm/memcontrol-v1.c to reduce
memory overhead and code complexity.
- The 10 patch series "selftests/mm: refactor pkey helpers and fix mmap
error handling" from Hongfu Li refactors pkeys shared tracing and
assertion helpers into a common file, unifies protection key selftests
to use consistent diagnostic logging and assertions, and enforces
standardized MAP_FAILED return checks for mmap() calls across the tests.
- The 18 patch series "mm/damon: optimize out nr_accesses_bp" from SJ
Park replaces the error-prone, continuously updated nr_accesses_bp field
in damon_region with an on-demand moving sum function
(damon_nr_accesses_mvsum()), reducing structure memory overhead and
avoiding state corruption bugs.
- The 6 patch series "Open HugeTLB allocation routine for more generic
use" from Ackerley Tng decouples HugeTLB folio allocation from VMA
dependencies by introducing hugetlb_alloc_folio(), enabling subsystems
like guest_memfd to allocate HugeTLB folios without standard VMA
reservations or pseudo-VMAs.
- The 3 patch series "mm/damon: provide pseudo moving sum probe_hits"
from SJ Park integrates DAMON's probe_hits attribute counter into the
pseudo moving sum infrastructure, enabling real-time, online monitoring
without waiting for full aggregation intervals.
- The 18 patch series "mm: Some cleanups for page allocator APIs" from
Brendan Jackman simplifies and refactors the page allocator entry points
and flags by unifying allocation paths, adding internal alloc_flags
arguments, and eliminating redundant __ prefixed alloc_pages variants.
- The 5 patch series "Fix incorrect access of hugetlb pte entries" from
Dev Jain enforces the consistent use of huge_ptep_get() instead of
ptep_get() for HugeTLB entries and fixes an unaligned address issue in
arm64's huge_ptep_get() implementation.
- The 8 patch series "mm/damon: validate all parameters in the core"
from SJ Park consolidates parameter validation into the DAMON core
specifically within damon_start() and damon_commit_ctx() to centralize
error checking, eliminate caller-side redundant checks and to improve
maintenance efficiency.
- The 3 patch series "tools/mm/page_owner_sort: fix filtering and
cleanup issues" from Yichong Chen renames is_need() to filter_record()
for clearer return semantics, fixes per-record allocation memory leaks
and bounds output copies in search_pattern() to address an existing
buffer issue.
- The 4 patch series "memcg: bail out reclaim when memcg is dying" from
Jiayuan Chen mitigates a system-wide stall which occurs when a cgroup is
removed while one of its memory control files is doing synchronous
reclaim.
- The 5 patch series "mm/memory-failure: add panic option for
unrecoverable pages" from Breno Leitao introduces an opt-in
vm.panic_on_unrecoverable_memory_failure sysctl that immediately panics
the kernel on unrecoverable memory errors in kernel-owned pages to
preserve error context and prevent delayed, silent data corruption.
- The 11 patch series "mm/damon: refactor damon_{start,stop,commit}()
for simple error handling" from SJ Park refactors the DAMON core API
functions to guarantee that all contexts are fully stopped when
damon_start(), damon_stop(), or damon_commit() fail, eliminating the
need for complex and error-prone caller-side cleanup code.
- The 5 patch series "Keep tail page private zero at free and folio
split" from Zi Yan adds checks to ensure tail_page->private is zero when
freeing compound or high-order pages and when promoting tail pages
during large folio splits. By validating these fields at free and split
time, it allows the removal of redundant private field clearing inside
prep_compound_tail().
- The 4 patch series "mm: drop redundant lru_add_drain in anon folio
reuse paths" from Barry Song eliminates redundant lru_add_drain() calls
in wp_can_reuse_anon_folio() and do_swap_page() to reduce LRU lock
contention and system overhead.
By validating folio refcounts against the LRU cache before draining
and removing unnecessary drains in the swap path, it achieves up to a
30.5% reduction in drain calls during heavy swap workloads.
- The 3 patch series "mm: clean up folio LRU and swap declarations" from
Jianyue Wu reorganizes folio LRU and swap code by relocating
page-cluster state to mm/swap_state.c, renaming mm/swap.c to mm/folio.c,
and moving MM-internal reclaim declarations into mm/internal.h.
- The 15 patch series "userfaultfd: working set tracking for VM guest
memory" from Kiryl Shutsemau adds userfaultfd support for tracking the
working set of VM guest memory, so a VMM can identify hot pages and
reclaim cold ones to tiered or remote storage.
- The 10 patch series "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part
2)" from David Hildenbrand removes the remaining pieces of
CONFIG_HAVE_BOOTMEM_INFO_NODE, performing some smaller cleanups around
freeing of reserved vmemmap pages on the way.
- The 7 patch series "mm/damon: update probe hits for runtime parameter
commits" from SJ Park ensures that DAMON's probe_hits attribute counter
is properly updated when monitoring intervals are changed at runtime,
matching the behavior of nr_accesses. To achieve this, it refactors and
renames existing helper functions for shared use, applies the updates to
probe_hits, and handles edge cases in damon_probe_hits_mvsum() to
maintain measurement accuracy.
- The 3 patch series "KSM: performance optimizations for rmap_walk_ksm"
from xu xin resolves a severe KSM reverse-mapping performance bottleneck
where thousands of split VMAs sharing a single anon_vma cause extended
lock contention. By adding an interval-filtering check during the rmap
walk, it reduces worst-case anon_vma lock hold times from over 500ms
down to under 2ms, preventing application freezes and latency spikes
under memory pressure.
- The 3 patch series "mm: split a couple of headers from internal.h"
from Mike Rapoport splits declarations related to mm_init, memblock,
vmalloc and sparse into new headers.
- The 2 patch series "KSM: use linear_page_index in collect_procs_ksm()"
from xu xin applies the interval tree optimization from rmap_walk_ksm()
to collect_procs_ksm() to avoid iterating over non-matching VMAs during
KSM memory error handling. It hoists loop-invariant address
initialization and restricts the anon_vma_interval_tree_foreach walk to
a targeted page offset range, reducing redundant checks and improving
lookup efficiency.
- The 3 patch series "selftests/mm: avoid false failures in hugetlb and
KSM tests" from Sayali Patil fixes issues in the hugetlb and KSM MM
selftest categories that can report failures when the prerequisites for
the tests are not satisfied.
- The 19 patch series "mm/damon: introduce data attributes only
monitoring" from SJ Park introduces attribute-weighted region management
in DAMON, allowing users to prioritize specific data attributes (such as
page sizes or cgroups) over or instead of access monitoring.
By assigning weights to attribute probes, DAMON can completely disable
access tracking and adjust monitoring regions based on weighted
probe-hit counters to optimize monitoring quality for attribute-focused
workloads.
- The 8 patch series "mm/hmm: Add mmap lock-drop support for
userfaultfd-backed mappings" from Stanislav Kinsburskii extends
hmm_range_fault() to support userfaultfd-backed regions by allowing the
mmap lock to be dropped during fault handling via a new
hmm_range_fault_locked() helper.
By accepting a locked pointer and signaling retry status when lock
release occurs, it enables page fault resolution in userfaultfd regions
while preserving backward compatibility for existing callers.
- The 33 patch series "mm: make VMA page offset handling more
consistent" from Lorenzo Stoakes cleans up and standardizes how
vma->vm_pgoff is accessed and manipulated across file-backed and
anonymous mappings in the kernel.
It introduces dedicated helper functions such as vma_start_pgoff(),
vma_end_pgoff(), vma_set_pgoff() and linear_page_delta() while renaming
rmap interval tree helpers to better reflect their functionality.
These changes establish a cleaner foundation for future work that will
unify virtual page offset indexing for all anonymous and CoW'd folios.
- The 3 patch series "mm: handle device-private PMDs in walk callbacks"
from Usama Arif addresses kernel panics and state corruption caused by
MM walk callbacks reaching non-present device-private PMD swap entries
created during HMM migrations.
It ensures that functions which acquire pmd_trans_huge_lock() properly
recognize device-private PMDs instead of assuming a present THP or a
standard migration entry.
- The 5 patch series "mm/rmap: Refactor try_to_unmap_one" from Dev Jain
refactors try_to_unmap_one by modularizing Hugetlb, anonymous-lazyfree,
and anonymous-swapbacked logic into dedicated functions, laying the
structural groundwork for batched anonymous large folio unmapping.
- The 4 patch series "Docs/ABI/damon: sysfs ABI document fixes and
additions" from Song Hu fixes typos and fills in missing entries in the
DAMON sysfs ABI document.
- The 10 patch series "dax/kmem: atomic whole-device hotplug via sysfs"
from Gregory Price introduces an atomic sysfs state attribute and
supporting DAX/MM infrastructure to prevent userland races when
offlining and removing entire memory regions.
By adding an unplugged state alongside standard online modes, it
enables whole-device atomic hotplug control while preserving backward
compatibility.
- The 13 patch series "mm: convert more vm_flags_t users to vma_flags_t"
from Lorenzo Stoakes continues transitioning the kernel from the
deprecated vm_flags_t type to vma_flags_t across core memory management
infrastructure.
It replaces legacy type usage in core functions such as do_mmap(),
unmapped area allocation, mm->def_vma_flags, and VMA operations like
mlock, mprotect, and mremap.
- The 2 patch series "Two small patches to clean up mm/mm_slot.h" from
xu xin refactors mm_slot.h by introducing mm_slot_remove() to unify
duplicate slot deletion sequences in khugepaged and KSM. It also adds
code documentation explaining why mm_slot_lookup and mm_slot_insert must
remain as preprocessor macros rather than static inline functions.
- The 10 patch series "mm/damon/core: hide core-private struct fields"
from SJ Park cleans up DAMON core structures by consistently marking
internal-only fields with private: comment tags to prevent improper
direct access from outer layers.
It enforces encapsulation across core structures including
damon_region, damon_target, and damon_ctx and updates DAMON_SYSFS to
interact through approved access APIs instead of exposing raw struct
members.
- The 6 patch series "mm/damon: unurgent fixes for infinite loop, NULL
de-ref and races" from SJ Park addresses potential infinite loops, NULL
dereferences, and race conditions identified in DAMON.
It fixes an infinite loop triggered by extreme user configurations, a
NULL pointer dereference within unit tests and minor monitoring
accuracy degradation caused by subtle runtime races.
- The 2 patch series "mm/page_alloc: fixes for free_pages_nolock() on
RT/UP" from Brendan Jackman fixes an NMI safety flaw in
__free_frozen_pages() where freeing pages on non-SMP or PREEMPT_RT
kernels can bypass can_spin_trylock() checks via non-PCP or isolated
migration paths.
It also resolves potential kernel crashes and privilege escalation
risks triggered when BPF tracing runs in NMI context alongside memory
hotplug or large allocation frees.
- The 4 patch series "mm/page_alloc: couple of followups for recent
cleanups" from Brendan Jackman cleans up and updates page allocator
nomenclature, documentation, and debug assertions.
It aligns internal FPI_ flags with the public "nolock" naming
convention, removes outdated internal implementation details from
high-level page allocator comments, and eliminates obsolete VM_BUG_ON()
assertions in allocation paths.
- The 3 patch series "mm/mseal: further cleanups" from Lorenzo Stoakes
refactors and simplifies the mseal implementation by clarifying API
boundaries and removing unnecessary code complexity.
It replaces generic do_mseal() usage outside the syscall with a
dedicated mseal_mmap_page_zero() helper for MMAP_PAGE_ZERO, eliminates
mm_struct parameters to enforce that sealing applies only to
current->mm, and streamlines overall logic and comments with no
functional changes intended.
- The 4 patch series "mm/vmscan: fix swappiness=max and clean up
per-node proactive reclaim" from Ridong Chen resolves reclaim behavior
bugs and cleans up function parameters across memory reclaim paths.
It fixes swappiness=max in both standard reclaim and MGLRU so
unswappable anonymous memory no longer falls back to evicting page
cache, ensures reclaim_store() returns accurate error codes instead of
collapsing all failures into -EAGAIN, and removes the obsolete gfp_mask
parameter from __node_reclaim().
- The 6 patch series "mm: mincore: misc cleanups" from Kefeng Wang
cleans up and simplifies the mincore code. Most importantly, it removes
the historical special behavior that always reports VM_PFNMAP pages as
non-resident.
- The 2 patch series "mm/huge_memory: drop dead split helper variants"
from Kiryl Shutsemau implements two trivial cleanups in the folio split
API.
- The 7 patch series "mm/damon: fix uninitialized DAMOS field and kunit
exec expectation bugs" from SJ Park resolves minor operational and
testing bugs in DAMON identified by Sashiko. It initializes the
damos->last_applied field to prevent occasional efficiency degradation
and fixes invalid memory accesses in DAMON KUnit tests during test
failure handling.
- The 3 patch series "cleanup for stable_page_flags()" from Jinjiang Tu
cleans up and refactors stable_page_flags() used by /proc/kpageflags
without altering functionality.
It uses BIT_ULL() to prevent shift-overflow warnings on 64-bit flag
bits, converts folio-specific flag checks to standard folio_test_*()
helpers, and removes redundant CONFIG_PAGE_IDLE_FLAG handling.
- The 3 patch series "Batch unmap of uffd-wp file folios" from Dev Jain
extends batched folio unmapping support to file folios within
userfaultfd write-protect (uffd-wp) VMAs by adding batching capabilities
to pte_install_uffd_wp_if_needed().
This removes special-case restrictions on uffd-wp VMAs in
try_to_unmap_one(), significantly simplifying the function's control
flow and complexity.
- The 3 patch series "mm/early_ioremap: clarify and clean up
early_ioremap_reset()" from Sang-Heon Jeon clarifies and cleans up the
architecture-specific usage of __late_set_fixmap() and
__late_clear_fixmap() after early_ioremap_reset().
It adds explicit documentation regarding when early_ioremap_reset()
must be called and removes redundant macro definitions and reset calls
in the RISC-V and ARM64 architectures.
- The 4 patch series "mm: fix reclaim storms in defrag_mode" from
Johannes Weiner addresses severe performance regressions, swap storms,
and spurious OOMs caused by vm.defrag_mode=1 under high memory pressure
in Meta production.
It updates the page allocator slowpath so non-movable allocation
requests actively trigger direct reclaim and direct compaction at
pageblock_order scale, allowing them to claim whole pageblocks rather
than spinning unproductively.
- The 2 patch series "zram: lockmap tweaks" from Sebastian Siewior
optimizes and fixes lockdep tracking for zram devices by consolidating
per-entry lockmaps and isolating lock classes across multiple instances.
It reduces memory overhead by replacing per-entry lockdep_map instances
with a single map per struct zram, and assigns a dynamic lock_class_key
to each instance to prevent false deadlock reports when different zram
devices are backed by distinct filesystems.
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Merge tag 'mm-stable-2026-08-18-18-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
Pull MM updates from Andrew Morton:
- "mm: drop "sub" prefix from various places" (Dev Jain)
page->folio conversion and a naming cleanup
- "mm/kasan: remove redundant initialization for kasan_flag_write_only"
(Igor Putko)
KASAN cleanup work
- "mm/filemap: reduce unnecessary xarray lookups" (Chi Zhiling)
Small speedup in the pagecaache read code
- "mm/percpu: Fix possible NOFS/NOIO reclaim recursion" (Kaitao Cheng)
Improve the vmalloc code - mainly the avoidance of GFP_KERNEL
allocations when the caller asked for GFP_NOFS or GFP_NOIO
- "mm/kmemleak: avoid soft lockup when scanning task stacks" (Breno
Leitao)
Avoid a soft lockup watchdog trigger from the kmemleak scanning code
in extreme situations
- "mm/page_owner: misc cleanups" (Ye Liu)
Cleanups to the page_owner code. For some reason lots of people have
been working on the page_owner code this cycle.
- "mm: convert to walk_page_range_vma() to eliminate find_vma()"
(Kefeng Wang)
Simplify and accelerate the page walking library function
- "mm/migrate: preparatory cleanups for batch copy and offload"
(Shivank Garg)
Cleanups in the migration code
- "mm/page_owner: add per-fd filter infrastructure for print_mode and
NUMA filtering" (Zhen Ni)
Per-fd filtering to page_owner in order to reduce the sometimes vast
amount of output it can produce
- "mm: Refactor bootmem gigantic hugepage allocation" (Muchun Song)
Fixes and preparatory cleanups around bootmem HugeTLB handling,
sparse initialization ordering, and related vmemmap setup
- "mm/zsmalloc: reduce lock contention in zs_free()" (Wenchao Hao)
Reduce lock contention in zs_free(), which dominates the unmap path
under memory pressure on Android (LMK kills) and on x86 servers
running zswap-heavy workloads.
Up to 1.83x improvement in microbenchmarking.
- "move alloc_tag.c file under mm/" (Suren Baghdasaryan)
- "samples/damon: handle damon_{start,stop}() failures" (SJ Park)
Fix improper handling of damon_start(), damon_stop(), and
damon_call() failures across DAMON sample modules to prevent
potential memory leaks, operation disruptions and use-after-free
bugs
- "mm/damon/sysfs: kobject_del() directories that users can
create/remove" (SJ Park)
Fix delayed sysfs directory removal under DEBUG_KOBJECT_RELEASE
causeing creation failures due to duplicate directory names by adding
missing kobject_del() calls before creating new directories
- "mm: cleanup clear_not_present_full_ptes()" (David Hildenbrand)
Clean up the core pte handling code
- "selftests/damon: misc fixes for test bugs" (Kunwu Chan)
Fix several bugs in the DAMON selftests
- "selftests/damon: fix memcg_path staging handling" (Cheng Nie)
Fix a bug in _damon_sysfs.py for damos_filter memcg_path setup, and
add a test case for it in sysfs.py.
- "selftests/damon: test kdamond refresh_ms" (Ruslan Valiyev)
Selftest coverage for DAMON's refresh_ms sysfs feature by updating
the test control module and verifying that scheme stats update
automatically without manual intervention
- "mm/damon: five misc fixups" (Akinobu Mita)
Miscellaneous DAMON fixups.
- "mm/damon/core: detect internal variation above max_nr_regions/2"
(Jiayuan Chen)
Fix DAMON's region splitting behavior when region counts exceed half
the maximum budget by dynamically scaling down the split fraction as
the limit approaches, preventing large regions from staying un-split,
and add corresponding KUnit test coverage
- "mm: preparatory patches for PMD level swap entries" (Usama Arif)
Refactor and clean up PMD softleaf helpers, call sites, and
architecture flags to lay the groundwork for a follow-up series that
introduces PMD page table swap entries
- "mm/damon: update, optimize, and clean up doc, tests, and code" (SJ
Park)
Update DAMON design and ABI documentation, expands unit and selftest
coverage, optimize damon_commit_target_regions(), and clean up
recently added sysfs interface code for better readability
- "mm/vmpressure: reduce CPU, memory and code overhead on cgroup v2"
(Usama Arif)
Optimize vmpressure() by skipping unnecessary work on cgroup v2 for
userspace event notifications and refactor v1-only eventfd handling
into mm/memcontrol-v1.c to reduce memory overhead and code complexity
- "selftests/mm: refactor pkey helpers and fix mmap error handling"
(Hongfu Li)
Refactor pkeys shared tracing and assertion helpers into a common
file, unify protection key selftests to use consistent diagnostic
logging and assertions, and enforce standardized MAP_FAILED return
checks for mmap() calls across the tests
- "mm/damon: optimize out nr_accesses_bp" (SJ Park)
Replace the error-prone, continuously updated nr_accesses_bp field in
damon_region with an on-demand moving sum function, reducing
structure memory overhead and avoiding state corruption bugs
- "Open HugeTLB allocation routine for more generic use" (Ackerley Tng)
Decouple HugeTLB folio allocation from VMA dependencies by
introducing hugetlb_alloc_folio(), enabling subsystems like
guest_memfd to allocate HugeTLB folios without standard VMA
reservations or pseudo-VMAs
- "mm/damon: provide pseudo moving sum probe_hits" (SJ Park)
Integrate DAMON's probe_hits attribute counter into the pseudo moving
sum infrastructure, enabling real-time, online monitoring without
waiting for full aggregation intervals
- "mm: Some cleanups for page allocator APIs" (Brendan Jackman)
Simplify and refactor the page allocator entry points and flags by
unifying allocation paths, adding internal alloc_flags arguments, and
eliminating redundant __ prefixed alloc_pages variants.
- "Fix incorrect access of hugetlb pte entries" (Dev Jain)
Enforce the consistent use of huge_ptep_get() instead of ptep_get()
for HugeTLB entries and fixes an unaligned address issue in arm64's
huge_ptep_get() implementation
- "mm/damon: validate all parameters in the core" (SJ Park)
Consolidate parameter validation into the DAMON core specifically
within damon_start() and damon_commit_ctx() to centralize error
checking, eliminate caller-side redundant checks and to improve
maintenance efficiency
- "tools/mm/page_owner_sort: fix filtering and cleanup issues" (Yichong
Chen)
Rename is_need() to filter_record() for clearer return semantics, fix
per-record allocation memory leaks and bound output copies in
search_pattern() to address an existing buffer issue
- "memcg: bail out reclaim when memcg is dying" (Jiayuan Chen)
Mitigate a system-wide stall which occurs when a cgroup is removed
while one of its memory control files is doing synchronous reclaim
- "mm/memory-failure: add panic option for unrecoverable pages" (Breno
Leitao)
Introduce an opt-in vm.panic_on_unrecoverable_memory_failure sysctl
that immediately panics the kernel on unrecoverable memory errors in
kernel-owned pages to preserve error context and prevent delayed,
silent data corruption
- "mm/damon: refactor damon_{start,stop,commit}() for simple error
handling" (SJ Park)
Refactor the DAMON core API functions to guarantee that all contexts
are fully stopped when damon_start(), damon_stop(), or damon_commit()
fail, eliminating the need for complex and error-prone caller-side
cleanup code
- "Keep tail page private zero at free and folio split" (Zi Yan)
Add checks to ensure tail_page->private is zero when freeing compound
or high-order pages and when promoting tail pages during large folio
splits. By validating these fields at free and split time, it allows
the removal of redundant private field clearing inside
prep_compound_tail()
- "mm: drop redundant lru_add_drain in anon folio reuse paths" (Barry
Song)
Eliminate redundant lru_add_drain() calls in
wp_can_reuse_anon_folio() and do_swap_page() to reduce LRU lock
contention and system overhead
By validating folio refcounts against the LRU cache before draining
and removing unnecessary drains in the swap path, it achieves up to a
30.5% reduction in drain calls during heavy swap workloads
- "mm: clean up folio LRU and swap declarations" (Jianyue Wu)
Reorganize folio LRU and swap code by relocating page-cluster state
to mm/swap_state.c, renaming mm/swap.c to mm/folio.c, and moving
MM-internal reclaim declarations into mm/internal.h.
- "userfaultfd: working set tracking for VM guest memory" (Kiryl
Shutsemau)
Add userfaultfd support for tracking the working set of VM guest
memory, so a VMM can identify hot pages and reclaim cold ones to
tiered or remote storage
- "mm: remove CONFIG_HAVE_BOOTMEM_INFO_NODE (Part 2)" (David
Hildenbrand)
Remove the remaining pieces of CONFIG_HAVE_BOOTMEM_INFO_NODE,
performing some smaller cleanups around freeing of reserved vmemmap
pages on the way.
- "mm/damon: update probe hits for runtime parameter commits" (SJ Park)
Ensure that DAMON's probe_hits attribute counter is properly updated
when monitoring intervals are changed at runtime, matching the
behavior of nr_accesses. To achieve this, it refactors and renames
existing helper functions for shared use, applies the updates to
probe_hits, and handles edge cases in damon_probe_hits_mvsum() to
maintain measurement accuracy.
- "KSM: performance optimizations for rmap_walk_ksm" (xu xin)
Resolve a severe KSM reverse-mapping performance bottleneck where
thousands of split VMAs sharing a single anon_vma cause extended lock
contention.
By adding an interval-filtering check during the rmap walk, it
reduces worst-case anon_vma lock hold times from over 500ms down to
under 2ms, preventing application freezes and latency spikes under
memory pressure.
- "mm: split a couple of headers from internal.h" (Mike Rapoport)
Split declarations related to mm_init, memblock, vmalloc and sparse
into new headers
- "KSM: use linear_page_index in collect_procs_ksm()" (xu xin)
Apply the interval tree optimization from rmap_walk_ksm() to
collect_procs_ksm() to avoid iterating over non-matching VMAs during
KSM memory error handling.
It hoists loop-invariant address initialization and restricts the
anon_vma_interval_tree_foreach walk to a targeted page offset range,
reducing redundant checks and improving lookup efficiency.
- "selftests/mm: avoid false failures in hugetlb and KSM tests" (Sayali
Patil)
Fix issues in the hugetlb and KSM MM selftest categories that can
report failures when the prerequisites for the tests are not
satisfied
- "mm/damon: introduce data attributes only monitoring" (SJ Park)
Introduce attribute-weighted region management in DAMON, allowing
users to prioritize specific data attributes (such as page sizes or
cgroups) over or instead of access monitoring.
By assigning weights to attribute probes, DAMON can completely
disable access tracking and adjust monitoring regions based on
weighted probe-hit counters to optimize monitoring quality for
attribute-focused workloads.
- "mm/hmm: Add mmap lock-drop support for userfaultfd-backed mappings"
(Stanislav Kinsburskii)
Extend hmm_range_fault() to support userfaultfd-backed regions by
allowing the mmap lock to be dropped during fault handling via a new
hmm_range_fault_locked() helper.
By accepting a locked pointer and signaling retry status when lock
release occurs, it enables page fault resolution in userfaultfd
regions while preserving backward compatibility for existing callers.
- "mm: make VMA page offset handling more consistent" (Lorenzo Stoakes)
Clean up and standardize how vma->vm_pgoff is accessed and
manipulated across file-backed and anonymous mappings in the kernel
It introduces dedicated helper functions such as vma_start_pgoff(),
vma_end_pgoff(), vma_set_pgoff() and linear_page_delta() while
renaming rmap interval tree helpers to better reflect their
functionality.
These changes establish a cleaner foundation for future work that
will unify virtual page offset indexing for all anonymous and CoW'd
folios.
- "mm: handle device-private PMDs in walk callbacks" (Usama Arif)
Address kernel panics and state corruption caused by MM walk
callbacks reaching non-present device-private PMD swap entries
created during HMM migrations
It ensures that functions which acquire pmd_trans_huge_lock()
properly recognize device-private PMDs instead of assuming a present
THP or a standard migration entry.
- "mm/rmap: Refactor try_to_unmap_one" (Dev Jain)
Refactor try_to_unmap_one by modularizing Hugetlb,
anonymous-lazyfree, and anonymous-swapbacked logic into dedicated
functions, laying the structural groundwork for batched anonymous
large folio unmapping.
- "Docs/ABI/damon: sysfs ABI document fixes and additions" (Song Hu)
Fix typos and fills in missing entries in the DAMON sysfs ABI
document
- "dax/kmem: atomic whole-device hotplug via sysfs" (Gregory Price)
Introduce an atomic sysfs state attribute and supporting DAX/MM
infrastructure to prevent userland races when offlining and removing
entire memory regions
By adding an unplugged state alongside standard online modes, it
enables whole-device atomic hotplug control while preserving backward
compatibility.
- "mm: convert more vm_flags_t users to vma_flags_t" (Lorenzo Stoakes)
Continue transitioning the kernel from the deprecated vm_flags_t type
to vma_flags_t across core memory management infrastructure.
It replaces legacy type usage in core functions such as do_mmap(),
unmapped area allocation, mm->def_vma_flags, and VMA operations like
mlock, mprotect, and mremap.
- "Two small patches to clean up mm/mm_slot.h" (xu xin)
Refactor mm_slot.h by introducing mm_slot_remove() to unify duplicate
slot deletion sequences in khugepaged and KSM. It also adds code
documentation explaining why mm_slot_lookup and mm_slot_insert must
remain as preprocessor macros rather than static inline functions.
- "mm/damon/core: hide core-private struct fields" (SJ Park)
Clean up DAMON core structures by consistently marking internal-only
fields with private: comment tags to prevent improper direct access
from outer layers.
It enforces encapsulation across core structures including
damon_region, damon_target, and damon_ctx and updates DAMON_SYSFS to
interact through approved access APIs instead of exposing raw struct
members.
- "mm/damon: unurgent fixes for infinite loop, NULL de-ref and races"
(SJ Park)
Address potential infinite loops, NULL dereferences, and race
conditions identified in DAMON
It fixes an infinite loop triggered by extreme user configurations, a
NULL pointer dereference within unit tests and minor monitoring
accuracy degradation caused by subtle runtime races.
- "mm/page_alloc: fixes for free_pages_nolock() on RT/UP" (Brendan
Jackman)
Fix an NMI safety flaw in __free_frozen_pages() where freeing pages
on non-SMP or PREEMPT_RT kernels can bypass can_spin_trylock() checks
via non-PCP or isolated migration paths.
It also resolves potential kernel crashes and privilege escalation
risks triggered when BPF tracing runs in NMI context alongside memory
hotplug or large allocation frees.
- "mm/page_alloc: couple of followups for recent cleanups" (Brendan
Jackman)
Clean up and update page allocator nomenclature, documentation, and
debug assertions.
It aligns internal FPI_ flags with the public "nolock" naming
convention, removes outdated internal implementation details from
high-level page allocator comments, and eliminates obsolete
VM_BUG_ON() assertions in allocation paths.
- "mm/mseal: further cleanups" (Lorenzo Stoakes)
Refactor and simplify the mseal implementation by clarifying API
boundaries and removing unnecessary code complexity.
It replaces generic do_mseal() usage outside the syscall with a
dedicated mseal_mmap_page_zero() helper for MMAP_PAGE_ZERO,
eliminates mm_struct parameters to enforce that sealing applies only
to current->mm, and streamlines overall logic and comments with no
functional changes intended.
- "mm/vmscan: fix swappiness=max and clean up per-node proactive
reclaim" (Ridong Chen)
Resolve reclaim behavior bugs and clean up function parameters across
memory reclaim paths
It fixes swappiness=max in both standard reclaim and MGLRU so
unswappable anonymous memory no longer falls back to evicting page
cache, ensures reclaim_store() returns accurate error codes instead
of collapsing all failures into -EAGAIN, and removes the obsolete
gfp_mask parameter from __node_reclaim().
- "mm: mincore: misc cleanups" (Kefeng Wang)
Clean up and simplifies the mincore code. Most importantly, it
removes the historical special behavior that always reports VM_PFNMAP
pages as non-resident.
- "mm/huge_memory: drop dead split helper variants" (Kiryl Shutsemau)
Two trivial cleanups in the folio split API
- "mm/damon: fix uninitialized DAMOS field and kunit exec expectation
bugs" (SJ Park)
Resolve minor operational and testing bugs in DAMON identified by
Sashiko. It initializes the damos->last_applied field to prevent
occasional efficiency degradation and fixes invalid memory accesses
in DAMON KUnit tests during test failure handling.
- "cleanup for stable_page_flags()" (Jinjiang Tu)
Clean up and refactor stable_page_flags() used by /proc/kpageflags
without altering functionality.
It uses BIT_ULL() to prevent shift-overflow warnings on 64-bit flag
bits, converts folio-specific flag checks to standard folio_test_*()
helpers, and removes redundant CONFIG_PAGE_IDLE_FLAG handling.
- "Batch unmap of uffd-wp file folios" (Dev Jain)
Extend batched folio unmapping support to file folios within
userfaultfd write-protect (uffd-wp) VMAs by adding batching
capabilities to pte_install_uffd_wp_if_needed().
This removes special-case restrictions on uffd-wp VMAs in
try_to_unmap_one(), significantly simplifying the function's control
flow and complexity.
- "mm/early_ioremap: clarify and clean up early_ioremap_reset()"
(Sang-Heon Jeon)
Clarify and clean up the architecture-specific usage of
__late_set_fixmap() and __late_clear_fixmap() after
early_ioremap_reset()
It adds explicit documentation regarding when early_ioremap_reset()
must be called and removes redundant macro definitions and reset
calls in the RISC-V and ARM64 architectures.
- "mm: fix reclaim storms in defrag_mode" (Johannes Weiner)
Address severe performance regressions, swap storms, and spurious
OOMs caused by vm.defrag_mode=1 under high memory pressure in Meta
production
It updates the page allocator slowpath so non-movable allocation
requests actively trigger direct reclaim and direct compaction at
pageblock_order scale, allowing them to claim whole pageblocks rather
than spinning unproductively.
- "zram: lockmap tweaks" (Sebastian Siewior)
Optimize and fix lockdep tracking for zram devices by consolidating
per-entry lockmaps and isolate lock classes across multiple instances
This reduces memory overhead by replacing per-entry lockdep_map
instances with a single map per struct zram, and assigns a dynamic
lock_class_key to each instance to prevent false deadlock reports
when different zram devices are backed by distinct filesystems.
* tag 'mm-stable-2026-08-18-18-39' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (501 commits)
selftests/mm: thuge-gen: fix test_shmget() for PAGE_SIZE check
selftests/mm: unpoison pages in memory-failure teardown
mm/shmem: downgrade final i_blocks check in shmem_evict_inode() to pr_warn()
mm/khugepaged: replace mutex_lock/mutex_unlock usage with guard macro
mm/zsmalloc: fix release order of locks in zs_page_migrate()
Documentation: zram: remove sections numbering
ksm: stop iterating VMAs when ksm_test_exit returns true
mm: fold userfaultfd_rwp() to false without CONFIG_ARCH_HAS_PTE_PROTNONE
mm/migrate: report RCU-tasks quiescent states in migrate_pages_batch()
zram: use a custom key for each zram object
zram: move lockmap to be per-zram instead per table
selftests/mm: fix gup_longterm EINVAL error message
mm: page_alloc: fix non-movable reclaim storm in defrag_mode
mm: page_alloc: move capture_control to the page allocator
mm: compaction: support non-movable compaction for pageblock requests
mm: page_alloc: __GFP_FS lockdep annotation for direct compaction
hugetlb: evaluate subpool free state while locked
mm/damon: remove trailing semicolons after function definitions
mm/damon/ops-common: prevent migration fallback to non-target nodes
mm/damon: update outdated comment about DAMOS filter handling
...
|
||
|
Shibo Zhu
|
cb258d651d |
PM: sleep: Unblock runtime PM when device prepare fails
device_prepare() blocks runtime PM for a device with runtime PM disabled
before invoking its system-sleep ->prepare() callback. For a device that
has never enabled runtime PM, this changes dev->power.last_status from
RPM_INVALID to RPM_BLOCKED.
If the callback returns an error, dpm_prepare() does not move the device
to dpm_prepared_list. Consequently, the recovery path through
dpm_complete() never calls device_complete() for the failing device.
The error path drops the runtime PM usage reference, but does not clear
RPM_BLOCKED. A later legitimate pm_runtime_enable() then reports:
Attempt to enable runtime PM when it is blocked
before clearing the stale state.
Call pm_runtime_unblock() on the prepare error path before dropping the
runtime PM reference, matching the cleanup performed by device_complete().
The issue was reproduced with a platform test device whose ->prepare()
callback returns -EIO while runtime PM has never been enabled. Before
the fix, last_status remained RPM_BLOCKED after the failed suspend and
the first pm_runtime_enable() produced the warning above. With the fix,
last_status is restored to RPM_INVALID and the warning is absent.
Fixes:
|
||
|
Linus Torvalds
|
ae814200e8 |
bitmap updates for v7.3
- bitmap_find_next_zero_area_off() optimization (Sunyi);
- bitmap_find_next_zero_area_off(): return size when no zero area is
found (Yury);
- bitmap vs IDA vs Maple Tree performance test (Yury);
- get rid of cpumap_print_to_pagebuf() (Yury);
- use nr_node_ids in __nodemask_pr_numnodes() (Li RongQing);
- bitops: make the *_bit_le functions use unsigned long (Benjamin);
- bitmap scatter & gather test fix (Christophe);
- use __ASSEMBLER__ in bitmap header files (Thomas);
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Merge tag 'bitmap-for-7.3' of https://github.com/norov/linux
Pull bitmap updates from Yury Norov:
"The usual set of fixes, cleanups and performance improvements together
with a couple of new tests:
- bitmap_find_next_zero_area_off() optimization (Sunyi)
- bitmap_find_next_zero_area_off(): return size when no zero area is
found (Yury)
- bitmap vs IDA vs Maple Tree performance test (Yury)
- get rid of cpumap_print_to_pagebuf() (Yury)
- use nr_node_ids in __nodemask_pr_numnodes() (Li RongQing)
- bitops: make the *_bit_le functions use unsigned long (Benjamin)
- bitmap scatter & gather test fix (Christophe)
- use __ASSEMBLER__ in bitmap header files (Thomas)"
* tag 'bitmap-for-7.3' of https://github.com/norov/linux: (25 commits)
lib: test bitmap vs IDA vs Maple Tree performance for region allocations
bitmap: Return size when no zero area is found
media: s5p-mfc: Treat bitmap size as allocation failure
crypto: ccp: Treat bitmap size as allocation failure
powerpc/msi: Treat bitmap size as allocation failure
ARM: dma-mapping: Treat bitmap size as allocation failure
bitmap: drop bitmap_next_set_region()
nodemask: reduce bitmap width to nr_node_ids in __nodemask_pr_numnodes()
bitmap: Properly initialise destination bitmap for scatter & gather test
lib/bitmap-str: get rid of cpumap_print_to_pagebuf()
perf: Use sysfs_emit() for cpumask show callbacks
PCI/sysfs: Use sysfs_emit() for cpumask show callbacks
RDMA/hfi1: Use sysfs_emit() for cpumask show helper
hwtracing: hisi_ptt: Use sysfs_emit() for cpumask show
fpga: dfl-fme-perf: Use sysfs_emit() for cpumask show
devfreq: Use sysfs_emit() for cpumask show callbacks
cpu: Use sysfs_emit() for cpumask show callback
x86/events: Use sysfs_emit() for cpumask show callbacks
powerpc: Use sysfs_emit() for cpumask show callbacks
arm: Use sysfs_emit() for cpumask show callbacks
...
|
||
|
Linus Torvalds
|
59e6295fac |
Driver core changes for 7.3-rc1
- container_of:
- Apply typeof_member(), remove the local __mptr variable to eliminate
variable shadowing warnings on nested container_of() calls, and remove
unnecessary parentheses.
- core:
- Add driver name to probe debug print for initcall_debug.
- Avoid repeatedly printing the same 'Fixed dependency cycle' log.
- Unwind device_add() on attribute creation failure in
attribute_container_add_class_device().
- Remove statistics group if encryption group creation fails in
transport_add_class_device().
- debugfs:
- Fix lockdown check for mmap_prepare().
- Warn if file creation failed due to uninitialized debugfs.
- device property:
- Implement fw_devlink support for software nodes by adding
software_node_add_links(), which creates fwnode links from DEV_PROP_REF
properties to enable automatic probe ordering. Add kunit-managed fwnode
helpers and test coverage.
- Fix infinite loop in fwnode_for_each_child_node() when the secondary fwnode
has more than one child. Add test cases.
- Fix out-of-bounds access in software_node_get_reference_args() when called
with index -1 (UINT_MAX).
- Refactor to use RAII approach with __free().
- Add Bartosz Golaszewski as software node reviewer.
- firmware loader:
- Fix race where a sysfs fallback request can complete before being queued as
pending, leading to a use-after-free on the next fallback request.
- Reject 0-size built-in firmware and fail the build on empty firmware files
in CONFIG_EXTRA_FIRMWARE.
- kobject:
- Provide __KOBJ_ATTR() and __KOBJ_ATTR_RO/WO() initialization macros and
allow the constification of kobject attributes, enabling them to reside in
read-only memory.
- platform:
- Provide platform_device_set_of_node(), platform_device_set_fwnode(), and
platform_device_set_of_node_from_dev() helpers that encapsulate firmware
node reference counting for dynamically allocated platform devices. Convert
all in-tree users that manually assigned dev.of_node or dev.fwnode, fixing a
pre-existing refcount bug in powermac. Switch to counting references of all
firmware node types, not only OF nodes.
- Unify the release path for dynamically allocated platform devices by
removing platform_device_release_full(). Amend the fwnode setter API
contract to warn if a primary software node is overwritten. Add KUnit tests
for correct software node removal on device unregistration.
- Rust:
- Auxiliary:
- Add registration_data_with() closure-based API for invariant ForLt types.
- Debugfs:
- Migrate BinaryWriter and BinaryReaderMut trait requirements from
kernel::transmute traits to zerocopy traits.
- Device:
- Add BoundInternal device context and InternalBoundContext trait for bus
abstractions that need internal access to a bound device.
- Make the lifetime on Core and CoreInternal invariant to prevent coercion
to shorter lifetimes.
- Devres:
- Fix race between concurrent revokers where the losing revoker could return
before the winning revoker finished dropping the inner data, causing
use-after-free.
- Ensure revocation is complete before the device finishes unbinding by
making the synchronization bidirectional.
- Add DevresLt<F: ForLt>, a wrapper around Devres that shortens 'static back
to the caller's borrow scope. Implement ForLt and CovariantForLt for Bar,
IoMem, and ExclusiveIoMem.
- Driver:
- Switch from index-based to pointer-based device ID info lookup, storing
static references in driver_data. Centralize device ID handling in
device_id.rs, removing the open-coded ACPI/OF matching logic and duplicate
ID table from driver.rs.
- I/O:
- Make I/O regions typed (with a dynamically-sized Region type for the
existing untyped case), create view types representing subregions of a
mapped I/O region, and add io_project!() for safely creating subviews.
- Split Io into a base trait (IoBase) and an extension trait (Io) with a
blanket implementation, preventing implementers from overriding provided
methods that unsafe code relies on.
- Add a SysMem backend for shared system memory with volatile access, and
make Coherent implement Io via an I/O view type. Add IoSysMap as sum type
of Mmio and SysMem. Add copying methods (memcpy_{from,to}io()) and
read_val()/write_val() for typed access.
- Replace dma_read!()/dma_write!() with io_read!()/io_write!() for
primitives and copying methods for aggregates; drop the old macros.
Convert nova-core to use I/O projection.
- Fix internal shortcut rule dispatch in the register!() macro, remove
unused rule arguments, and use path fragments for alias destinations.
- IRQ:
- Make irq::Registration compatible with lifetime-bound drivers by
removing the 'static bound on Handler/ThreadedHandler and
replacing Devres<RegistrationInner> with direct
request_irq()/free_irq() calls. Handlers can now directly own
lifetime-bound device resources.
- PCI:
- Convert IrqVectorRegistration to a lifetime-annotated owning type,
giving drivers explicit control over the allocation lifetime.
IrqVector embeds a resolved IrqRequest, making the conversion
infallible. Remove the redundant
request_irq()/request_threaded_irq() wrappers from pci::Device.
- Add pci_irq_type() C helper and expose it via irq_type() on
IrqVectorRegistration and IrqVector, returning PCI_IRQ_MSIX, PCI_IRQ_MSI,
or PCI_IRQ_INTX.
- Mark pci::Device refcount methods inline.
- Serdev:
- Add Rust abstractions for the serial device bus, including serdev::Driver
trait, serdev::Device wrapping struct serdev_device, and serdev::Adapter
implementing RegistrationOps. Includes a sample driver. Markus Probst
takes over as serdev maintainer for both C and Rust code.
- Misc:
- Split ForLt into a base trait (providing the Of<'a> GAT) and an unsafe
CovariantForLt subtrait guaranteeing covariance, enabling invariant types
(e.g. those containing Mutex<&'bound T>) to participate in the ForLt
abstraction.
- Fix Coherent read past EOF returning -ERANGE instead of zero.
- Fix firmware example UB by avoiding null-pointer ARef.
- misc:
- Avoid iattr allocation in kernfs listxattr by using kernfs_iattrs_noalloc().
- Unregister SoC bus on early device registration failure.
- Remove unused DMA_FENCE_TRACE Kconfig symbol.
- Fix /sys/module path in comment.
- Refactor ISA bus init to remove nested blocks.
- Remove redundant nodemask clears in numa_init().
- Add kernel-doc for fwnode_operations and sys_soc.h, mark internal property
data as private for kernel-doc, and add property.h/fwnode.h to driver-api
infrastructure docs.
- Add MAINTAINERS entry for sys_soc.h.
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Merge tag 'driver-core-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core
Pull driver core updates from Danilo Krummrich:
"container_of:
- Apply typeof_member(), remove the local __mptr variable to
eliminate variable shadowing warnings on nested container_of()
calls, and remove unnecessary parentheses
core:
- Add driver name to probe debug print for initcall_debug
- Avoid repeatedly printing the same 'Fixed dependency cycle' log
- Unwind device_add() on attribute creation failure in
attribute_container_add_class_device()
- Remove statistics group if encryption group creation fails in
transport_add_class_device()
debugfs:
- Fix lockdown check for mmap_prepare()
- Warn if file creation failed due to uninitialized debugfs
device property:
- Implement fw_devlink support for software nodes by adding
software_node_add_links(), which creates fwnode links from
DEV_PROP_REF properties to enable automatic probe ordering. Add
kunit-managed fwnode helpers and test coverage
- Fix infinite loop in fwnode_for_each_child_node() when the
secondary fwnode has more than one child. Add test cases
- Fix out-of-bounds access in software_node_get_reference_args() when
called with index -1 (UINT_MAX)
- Refactor to use RAII approach with __free()
- Add Bartosz Golaszewski as software node reviewer
firmware loader:
- Fix race where a sysfs fallback request can complete before being
queued as pending, leading to a use-after-free on the next fallback
request
- Reject 0-size built-in firmware and fail the build on empty
firmware files in CONFIG_EXTRA_FIRMWARE
kobject:
- Provide __KOBJ_ATTR() and __KOBJ_ATTR_RO/WO() initialization macros
and allow the constification of kobject attributes, enabling them
to reside in read-only memory
platform:
- Provide platform_device_set_of_node(), platform_device_set_fwnode(),
and platform_device_set_of_node_from_dev() helpers that encapsulate
firmware node reference counting for dynamically allocated platform
devices
Convert all in-tree users that manually assigned dev.of_node or
dev.fwnode, fixing a pre-existing refcount bug in powermac. Switch
to counting references of all firmware node types, not only OF
nodes
- Unify the release path for dynamically allocated platform devices
by removing platform_device_release_full(). Amend the fwnode setter
API contract to warn if a primary software node is overwritten. Add
KUnit tests for correct software node removal on device
unregistration
Rust:
- Auxiliary:
- Add registration_data_with() closure-based API for invariant
ForLt types
- Debugfs:
- Migrate BinaryWriter and BinaryReaderMut trait requirements
from kernel::transmute traits to zerocopy traits
- Device:
- Add BoundInternal device context and InternalBoundContext trait
for bus abstractions that need internal access to a bound
device.
- Make the lifetime on Core and CoreInternal invariant to prevent
coercion to shorter lifetimes
- Devres:
- Fix race between concurrent revokers where the losing revoker
could return before the winning revoker finished dropping the
inner data, causing use-after-free.
- Ensure revocation is complete before the device finishes
unbinding by making the synchronization bidirectional.
- Add DevresLt<F: ForLt>, a wrapper around Devres that shortens
'static back to the caller's borrow scope. Implement ForLt and
CovariantForLt for Bar, IoMem, and ExclusiveIoMem
- Driver:
- Switch from index-based to pointer-based device ID info lookup,
storing static references in driver_data. Centralize device ID
handling in device_id.rs, removing the open-coded ACPI/OF
matching logic and duplicate ID table from driver.rs
- I/O:
- Make I/O regions typed (with a dynamically-sized Region type
for the existing untyped case), create view types representing
subregions of a mapped I/O region, and add io_project!() for
safely creating subviews.
- Split Io into a base trait (IoBase) and an extension trait (Io)
with a blanket implementation, preventing implementers from
overriding provided methods that unsafe code relies on.
- Add a SysMem backend for shared system memory with volatile
access, and make Coherent implement Io via an I/O view type.
Add IoSysMap as sum type of Mmio and SysMem. Add copying
methods (memcpy_{from,to}io()) and read_val()/write_val() for
typed access.
- Replace dma_read!()/dma_write!() with io_read!()/io_write!()
for primitives and copying methods for aggregates; drop the old
macros. Convert nova-core to use I/O projection.
- Fix internal shortcut rule dispatch in the register!() macro,
remove unused rule arguments, and use path fragments for alias
destinations
- IRQ:
- Make irq::Registration compatible with lifetime-bound drivers
by removing the 'static bound on Handler/ThreadedHandler and
replacing Devres<RegistrationInner> with direct
request_irq()/free_irq() calls. Handlers can now directly own
lifetime-bound device resources
- PCI:
- Convert IrqVectorRegistration to a lifetime-annotated owning
type, giving drivers explicit control over the allocation
lifetime. IrqVector embeds a resolved IrqRequest, making the
conversion infallible. Remove the redundant
request_irq()/request_threaded_irq() wrappers from pci::Device.
- Add pci_irq_type() C helper and expose it via irq_type() on
IrqVectorRegistration and IrqVector, returning PCI_IRQ_MSIX,
PCI_IRQ_MSI, or PCI_IRQ_INTX.
- Mark pci::Device refcount methods inline
- Serdev:
- Add Rust abstractions for the serial device bus, including
serdev::Driver trait, serdev::Device wrapping struct
serdev_device, and serdev::Adapter implementing
RegistrationOps. Includes a sample driver. Markus Probst takes
over as serdev maintainer for both C and Rust code
- Misc:
- Split ForLt into a base trait (providing the Of<'a> GAT) and an
unsafe CovariantForLt subtrait guaranteeing covariance,
enabling invariant types (e.g. those containing Mutex<&'bound T>)
to participate in the ForLt abstraction.
- Fix Coherent read past EOF returning -ERANGE instead of zero.
- Fix firmware example UB by avoiding null-pointer ARef
misc:
- Avoid iattr allocation in kernfs listxattr by using
kernfs_iattrs_noalloc().
- Unregister SoC bus on early device registration failure.
- Remove unused DMA_FENCE_TRACE Kconfig symbol.
- Fix /sys/module path in comment.
- Refactor ISA bus init to remove nested blocks.
- Remove redundant nodemask clears in numa_init().
- Add kernel-doc for fwnode_operations and sys_soc.h, mark
internal property data as private for kernel-doc, and add
property.h/fwnode.h to driver-api infrastructure docs.
- Add MAINTAINERS entry for sys_soc.h"
* tag 'driver-core-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/driver-core/driver-core: (129 commits)
rust: pci: expose the allocated interrupt type
PCI: Add pci_irq_type() to query the allocated interrupt type
rust: pci: remove request_irq() and request_threaded_irq() from Device
rust: pci: resolve IRQ in index() and embed IrqRequest in IrqVector
rust: pci: convert IrqVectorRegistration to a lifetime-managed owning type
kernfs: avoid iattr allocation in listxattr
rust: serdev: use ThisModule::as_ptr() instead of field access
ACPI/IORT: use platform_device_set_fwnode()
ACPI/APMT: use platform_device_set_fwnode()
firmware_loader: do not queue completed sysfs fallback requests
rust: pci: Mark Device refcount methods inline
rust: irq: make Registration compatible with lifetime-bound drivers
rust: net/phy: remove expansion from doc
rust: dma: return zero for Coherent reads past EOF
rust: io: register: use path fragment for alias destination
rust: io: register: remove unused rule arguments
rust: io: register: dispatch shortcut rules internally
MAINTAINERS: add sys_soc.h to DRIVER CORE
rust: debugfs: remove unsafe blocks from traits impl for Vec
rust: debugfs: migrate debugfs traits requirements to zerocopy
...
|
||
|
Linus Torvalds
|
259c4f8e77 |
regmap: Updates for v7.3
This is a relatively busy release, though it's mostly cleanup work. We did add some new hooks for regmap-irq to support some driver work, that should also come in as part of a shared branch with the relevant driver work in the GPIO subsystem. -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmqDMxkACgkQJNaLcl1U h9D2zAgAhtilvZs1DOVuoIMjOQ7EOSmaszoRBWGQKJ+T9FOj8QuSuJrTj1DIByi9 R9TFcsKaiBK2KjBVg/eb4YCch5FfDYC+kANjw0+9aYs+02nKvpJYkZhODAumRT6F Df7ftdy9lFEfZoOnG/Ehebay2i3zvhc9gyfiI3XSuvFuFlg/sqwQQ9qh1BRYLian EmV4V4SBz4DG6MU0sXA/83TGMleev8qH/+itD0meS4YF7zbFi599q0cAihNqn0Tp hzxUH0PY89R7hXcZKgFGxq0I6/O/7zrbQNnA3BarCM9RXGH04DYpw9R1/kjTlMP3 JmlkCSiuS7/sj7n6B0/pQmMn2k6G7Q== =iTaj -----END PGP SIGNATURE----- Merge tag 'regmap-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap Pull regmap updates from Mark Brown: "This is a relatively busy release, though it's mostly cleanup work. We did add some new hooks for regmap-irq to support some driver work, that should also come in as part of a shared branch with the relevant driver work in the GPIO subsystem" * tag 'regmap-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap: regmap: clean up kernel-doc comments regcache: Validate cache_only state in regcache_sync_region() regcache: Warn if regcache_sync() is called in cache_only mode regcache: Mark cache dirty if selector register rewrite fails regcache: Preserve cache synchronization errors in regcache_sync() regmap: maple: Workaround for another false-positive compiler warning regcache: Make ->exit() callback return void |
||
|
Linus Torvalds
|
7711f4417f |
gpio updates for v7.3-rc1
GPIO core:
- extend the gpio-regmap abstraction layer with more features allowing users
to override configuration setting, translate register values and masks and
enable/disable interrupts
- extend GPIO kunit tests with suites verifying probe ordering by software
node devlink support and software node hogs
- shrink GPIO kunit initialization code
- coding style updates (remove commas from sentinels where applicable)
- with all users now converted treewide to using real firmware node links for
software node GPIO lookup: remove the deprecated label-matching mechanism
from from GPIO core
- drop redundant return value check of nonseekable_open() in gpiolib-cdev
- use IRQ trigger helpers where applicable
Driver updates:
- refactor error paths and logging in gpio-nomadik
- use more modern interfaces for getting resources in gpio-rockchip,
gpio-bt8xx and gpio-pca9570
- add missing MODULE_DEVICE_TABLE() to gpio-sifive and gpio-vf610
- drop unused FILONOFF macro from gpio-rcar
- extend build coverage of ioport GPIO drivers with COMPILE_TEST=y
- only enable the gpio-rtd driver by default with ARCH_REALTEK=y to avoid
bloating the build
- refactor coding style in several drivers
- use correct endianess translation in gpio-pcf85x
- add wake-up interrupt support to gpio-mvebu
- apply initial value in direction output setter in gpio-by-pinctrl
Misc:
- replace linux/gpio.h inclusions treewide with linux/gpio/legacy.h which now
exports all the deprecated APIs
- select GPIOLIB_LEGACY in Kconfig where required treewide
- use software nodes for gpio-keys in MFD drivers
Devicetree bindings:
- describe the realtek rtd1625 GPIO controller
- document new models for gpio-pca95xx and gpio-cadence
- document new property in gpio-rockchip
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Merge tag 'gpio-updates-for-v7.3-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio updates from Bartosz Golaszewski:
"GPIO core:
- extend the gpio-regmap abstraction layer with more features
allowing users to override configuration setting, translate
register values and masks and enable/disable interrupts
- extend GPIO kunit tests with suites verifying probe ordering by
software node devlink support and software node hogs
- shrink GPIO kunit initialization code
- coding style updates (remove commas from sentinels where
applicable)
- with all users now converted treewide to using real firmware node
links for software node GPIO lookup: remove the deprecated
label-matching mechanism from from GPIO core
- drop redundant return value check of nonseekable_open() in
gpiolib-cdev
- use IRQ trigger helpers where applicable
Driver updates:
- refactor error paths and logging in gpio-nomadik
- use more modern interfaces for getting resources in gpio-rockchip,
gpio-bt8xx and gpio-pca9570
- add missing MODULE_DEVICE_TABLE() to gpio-sifive and gpio-vf610
- drop unused FILONOFF macro from gpio-rcar
- extend build coverage of ioport GPIO drivers with COMPILE_TEST=y
- only enable the gpio-rtd driver by default with ARCH_REALTEK=y to
avoid bloating the build
- refactor coding style in several drivers
- use correct endianess translation in gpio-pcf85x
- add wake-up interrupt support to gpio-mvebu
- apply initial value in direction output setter in gpio-by-pinctrl
Misc:
- replace linux/gpio.h inclusions treewide with linux/gpio/legacy.h
which now exports all the deprecated APIs
- select GPIOLIB_LEGACY in Kconfig where required treewide
- use software nodes for gpio-keys in MFD drivers
Devicetree bindings:
- describe the realtek rtd1625 GPIO controller
- document new models for gpio-pca95xx and gpio-cadence
- document new property in gpio-rockchip"
* tag 'gpio-updates-for-v7.3-rc1-v2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (61 commits)
gpio: gpio-by-pinctrl: Apply initial value in direction output wrapper
dt-bindings: gpio: rockchip,gpio-bank: Add rockchip,grf property
gpio: Use IRQ trigger mask helpers
gpio: allow COMPILE_TEST for IOPORT drivers
gpio: realtek: Add driver for Realtek DHC RTD1625 SoC
gpio: regmap: Add IRQ enable/disable helpers
gpio: regmap: Add set_config callback
gpio: regmap: Add value_xlate callback
gpio: regmap: Add gpio_regmap_operation to extend reg_mask_xlate callback
gpio: regmap: Order kernel-doc descriptions with the actual appearance
gpio: regmap: Apply default resource callbacks for regmap IRQ chip
gpio: regmap: Provide default IRQ resource request and release callbacks
Revert "gpio: realtek: Add driver for Realtek DHC RTD1625 SoC"
gpib: gpio: replace linux/gpio.h inclusion
Input: matrix_keyboard - replace linux/gpio.h inclusion
phy: replace linux/gpio.h inclusions
pcmcia: replace linux/gpio.h inclusions
ASoC: replace linux/gpio.h inclusions
mfd: replace linux/gpio.h inclusions
sh: replace linux/gpio.h inclusions
...
|
||
|
Linus Torvalds
|
38fda1d9d2 |
memblock: updates for 7.3-rc1
Non-urgent fixes:
* Fix calculation of node_spanned_pages when running with kernelcore=mirror
* Properly handle failure to allocate per_cpu_nodestats in
free_area_init_core_hotplug()
* Fix deferred initialization of the memory map for configurations where
node's RAM end is not aligned on PAGES_PER_SECTION
Cleanups:
* Remove redundant pageblock_align() call in free_unused_memmap()
* Remove unnecessary invalid range checks in users of memblock iterators.
Some users of for_each_mem_range() and for_each_mem_pfn_range() verify
that start < end for each range. This is redundant because memblock
iterators guarantee to never return an invalid range
* Stop overlapping zones with kernelcore=mirror and align behaviour of
kernelcore=mirror with other variants of kernelcore=/movablecore=
* Remove redundant updates of numa_nodes_parsed mask in the callers of
numa_add_memblk(), the latter always updates the mask anyway
* Remove unnecessary initialization of pgdat->per_cpu_nodestats to NULL,
the variable is reset to the actual value a few lines below
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Merge tag 'memblock-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock
Pull memblock updates from Mike Rapoport:
"Non-urgent fixes:
- Fix calculation of node_spanned_pages when running
with 'kernelcore=mirror'
- Properly handle failure to allocate per_cpu_nodestats
in free_area_init_core_hotplug()
- Fix deferred initialization of the memory map for
configurations where node's RAM end is not aligned
on PAGES_PER_SECTION
Cleanups:
- Remove redundant pageblock_align() call in free_unused_memmap()
- Remove unnecessary invalid range checks in users of memblock
iterators. Some users of for_each_mem_range() and
for_each_mem_pfn_range() verify that start < end for each range.
This is redundant because memblock iterators guarantee to never
return an invalid range
- Stop overlapping zones with 'kernelcore=mirror' and align behaviour
of 'kernelcore=mirror' with other variants of kernelcore and
movablecore
- Remove redundant updates of numa_nodes_parsed mask in the callers
of numa_add_memblk(), the latter always updates the mask anyway
- Remove unnecessary initialization of pgdat->per_cpu_nodestats to
NULL, the variable is reset to the actual value a few lines below"
* tag 'memblock-v7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rppt/memblock: (25 commits)
mm/mm_init: deferred_grow_zone(): fix out-of-range first_deferred_pfn
mm/mm_init: remove unnecessary initialization of pgdat->per_cpu_nodestats
mm/mm_init: remove redundant memset in free_area_init()
mm: numa_memblks: use numa_add_reserved_memblk() in numa_cleanup_meminfo()
arch_numa: remove redundant node_possible_map assignment
mm: numa_memblks: remove redundant numa_nodemask_from_meminfo()
LoongArch: remove redundant numa_nodes_parsed node_set()
arch_numa: remove redundant numa_nodes_parsed node_set()
x86/numa: remove redundant numa_nodes_parsed node_set()
of/numa: remove redundant numa_nodes_parsed node_set()
ACPI: NUMA: remove redundant numa_nodes_parsed node_set()
mm: numa_memblks: set numa_nodes_parsed in numa_add_memblk()
mm/mm_init: handle alloc_percpu failure in free_area_init_core_hotplug
mm/mm_init: drop overlap_memmap_init()
mm/mm_init: don't overlap NORMAL and MOVABLE zones with kernelcore=mirror
mm/hugetlb: remove unnecessary empty range check in hugetlb_bootmem_set_nodes()
mm: remove unnecessary empty range check in early_calculate_totalpages()
powerpc64/kasan: Remove unreachable invalid range check in kasan_init_phys_region()
ARM: remove unreachable invalid range check in kasan_init()
riscv: remove unreachable invalid range check in kasan_init()
...
|
||
|
Linus Torvalds
|
a5778046a0 |
Power management updates for 7.3-rc1
- Minor fixes and cleanups in assorted cpufreq drivers (Dan Carpenter,
Guru Das Srinagesh, Haoxiang Li, Karl Mehltretter, Sasha Finkelstein,
and Pan Chuang)
- Fix cpufreq table creation and bios_limits() callback in the Rust
bindings (Priya Bala Govindasamy)
- Add IPQ5210 support to qcom-nvmem driver (Varadarajan Narayanan)
- Adjust the .adjust_perf() cpufreq driver callback to allow the
maximum performance value to be passed to drivers and update the
intel_pstate driver to use it (Rafael Wysocki)
- Set policy->cur to the actual requested frequency in the intel_pstate
driver when the performance policy is used (Rafael Wysocki)
- Simplify HWP handling on Broadwell processors in intel_pstate (Rafael
Wysocki)
- Fix setting minimum P-state at init time in intel_pstate (Rafael
Wysocki)
- Consolidate frequency values computation in intel_pstate and clean up
code in that driver (Rafael Wysocki)
- Add missing kernel-doc descriptions for structure and union members
in the amd-pstate driver (David Vernet)
- Handle missing policy in dynamic EPP callbacks in the amd-pstate
driver (EDAMAMEX)
- Introduce EXPORT_SYMBOL_FOR_PSTATE_UT() to export amd-pstate driver
symbols to the amd-pstate-ut subdriver (K Prateek Nayak)
- Add dynamic EPP as an "energy_performance_preference" mode in
amd-pstate, remove the "amd_dynamic_epp" kernel command line option
and the "dynamic_epp" sysfs attribute, and update the dynamic_epp
documentation accordingly (K Prateek Nayak)
- Add unit tests for CPPC Performance Priority and the "dynamic" EPP
mode in the amd-pstate driver (K Prateek Nayak)
- Set min_limit_freq based on bios_min_perf in amd-pstate and remove
the defensive check for bios_min_perf from it (K Prateek Nayak)
- Fix EPP return type and handle errors in amd-pstate during
initialization, toggle auto_sel in active mode on shared memory
systems, and cache the firmware programmed EPP value (Marco Scardovi)
- Skip tests in amd-pstate-ut if the amd-pstate driver is not in active
use (Qianheng Peng)
- Replace sprintf() with sysfs_emit() in sysfs show in the cpufreq
schedutil governor and fix a self-contradictory comment in
sugov_iowait_apply() (Zhongqiu Han)
- Fix the usage example for the sampling_rate tunable of the ondemand
cpufreq governor in admin-guide (wangxiaodong)
- Avoid using deep idle states during initialization in the intel_idle
driver to work around device handling issues (Rafael Wysocki)
- Fix and refactor the ACPI processor driver code related to ACPI _LPI
support and add ACPI _LPI support to intel_idle based on that ACPI
processor driver update (Rafael Wysocki)
- Backup and restore governor for cpufreq sptests (Yiwei Lin)
- Remove unnecessary sudo from quick_shuffle() and remove unused local
variables from switch_show_governor() in cpufreq selftests (Jinseok
Kim)
- Rename the PM core module parameter prefix to "pm" and allow the PM
transition (DPM) watchdog to be disabled by default (Tzung-Bi Shih)
- Fix off-by-one in wakelocks number limit check in the system sleep
sysfs interface (Haowen Tu)
- Remove kernel-doc markings from helper descriptions in the core
hibernation code (Adi Nata)
- Use %pe to print error pointer values in the hibernation core (Ronan
Marchal)
- Fix memory leak in snapshot_write_next() error path (Malaya Kumar
Rout)
- Delay allocating and linking the next swap_map_page in the
hibernation image saving code until another image page actually
needs to be recorded (Haesung Kim)
- Fix cleanup ordering around scope-based pointers in OPP (Gregor
Herburger).
- Use clk_get_optional() for optional clocks in OPP (Praveen Talari).
- Stop setting runtime_error on runtime resume callback failures to
allow drivers to recover from resume issues (Praveen Talari)
- Handle PMU registration failure during probe in the intel_rapl_tpmi
driver (Sumeet Pawnikar)
- Avoid optional imports in intel_pstate_tracer unless they are really
needed (Yousef Alhouseen)
- Add generic CPPC performance display to the cpupower utility, build
and call CPPC information on non-AMD processors, make cpupower print
kernel and hardware frequency information, and add libm to cpupower
for generic CPPC view (Jeremy Linton)
- Remove conditional return with no effect from cpupower (Sang-Heon
Jeon)
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Merge tag 'pm-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management updates from Rafael Wysocki:
"As has been the case for quite some time, this set of changes is
dominated by cpufreq updates including intel-pstate and amd-pstate
driver updates, minor fixes and cleanups of other assorted cpufreq
drivers, schedutil governor updates, fixes of the Rust bindings, new
hardware support (IPQ5210 in qcom-nvmem), and some updates of self
tests related to cpufreq.
The second largest group of changes are cpuidle updates consisting of
intel_idle driver updates and ACPI processor idle driver updates, both
mostly related to ACPI _LPI support.
There are also updates related to system sleep, mostly in the
hibernation core code, two operating performance points (OPP) updates,
one runtime PM framework update, one power capping update, and some
tools updates including the addition of ACPI CPPC support to cpupower.
Specifics:
- Minor fixes and cleanups in assorted cpufreq drivers (Dan
Carpenter, Guru Das Srinagesh, Haoxiang Li, Karl Mehltretter, Sasha
Finkelstein, and Pan Chuang)
- Fix cpufreq table creation and bios_limits() callback in the Rust
bindings (Priya Bala Govindasamy)
- Add IPQ5210 support to qcom-nvmem driver (Varadarajan Narayanan)
- Adjust the .adjust_perf() cpufreq driver callback to allow the
maximum performance value to be passed to drivers and update the
intel_pstate driver to use it (Rafael Wysocki)
- Set policy->cur to the actual requested frequency in the
intel_pstate driver when the performance policy is used (Rafael
Wysocki)
- Simplify HWP handling on Broadwell processors in intel_pstate
(Rafael Wysocki)
- Fix setting minimum P-state at init time in intel_pstate (Rafael
Wysocki)
- Consolidate frequency values computation in intel_pstate and clean
up code in that driver (Rafael Wysocki)
- Add missing kernel-doc descriptions for structure and union members
in the amd-pstate driver (David Vernet)
- Handle missing policy in dynamic EPP callbacks in the amd-pstate
driver (EDAMAMEX)
- Introduce EXPORT_SYMBOL_FOR_PSTATE_UT() to export amd-pstate driver
symbols to the amd-pstate-ut subdriver (K Prateek Nayak)
- Add dynamic EPP as an "energy_performance_preference" mode in
amd-pstate, remove the "amd_dynamic_epp" kernel command line option
and the "dynamic_epp" sysfs attribute, and update the dynamic_epp
documentation accordingly (K Prateek Nayak)
- Add unit tests for CPPC Performance Priority and the "dynamic" EPP
mode in the amd-pstate driver (K Prateek Nayak)
- Set min_limit_freq based on bios_min_perf in amd-pstate and remove
the defensive check for bios_min_perf from it (K Prateek Nayak)
- Fix EPP return type and handle errors in amd-pstate during
initialization, toggle auto_sel in active mode on shared memory
systems, and cache the firmware programmed EPP value (Marco
Scardovi)
- Skip tests in amd-pstate-ut if the amd-pstate driver is not in
active use (Qianheng Peng)
- Replace sprintf() with sysfs_emit() in sysfs show in the cpufreq
schedutil governor and fix a self-contradictory comment in
sugov_iowait_apply() (Zhongqiu Han)
- Fix the usage example for the sampling_rate tunable of the ondemand
cpufreq governor in admin-guide (wangxiaodong)
- Avoid using deep idle states during initialization in the
intel_idle driver to work around device handling issues (Rafael
Wysocki)
- Fix and refactor the ACPI processor driver code related to ACPI
_LPI support and add ACPI _LPI support to intel_idle based on that
ACPI processor driver update (Rafael Wysocki)
- Backup and restore governor for cpufreq sptests (Yiwei Lin)
- Remove unnecessary sudo from quick_shuffle() and remove unused
local variables from switch_show_governor() in cpufreq selftests
(Jinseok Kim)
- Rename the PM core module parameter prefix to "pm" and allow the PM
transition (DPM) watchdog to be disabled by default (Tzung-Bi Shih)
- Fix off-by-one in wakelocks number limit check in the system sleep
sysfs interface (Haowen Tu)
- Remove kernel-doc markings from helper descriptions in the core
hibernation code (Adi Nata)
- Use %pe to print error pointer values in the hibernation core
(Ronan Marchal)
- Fix memory leak in snapshot_write_next() error path (Malaya Kumar
Rout)
- Delay allocating and linking the next swap_map_page in the
hibernation image saving code until another image page actually
needs to be recorded (Haesung Kim)
- Fix cleanup ordering around scope-based pointers in OPP (Gregor
Herburger).
- Use clk_get_optional() for optional clocks in OPP (Praveen Talari).
- Stop setting runtime_error on runtime resume callback failures to
allow drivers to recover from resume issues (Praveen Talari)
- Handle PMU registration failure during probe in the intel_rapl_tpmi
driver (Sumeet Pawnikar)
- Avoid optional imports in intel_pstate_tracer unless they are
really needed (Yousef Alhouseen)
- Add generic CPPC performance display to the cpupower utility, build
and call CPPC information on non-AMD processors, make cpupower
print kernel and hardware frequency information, and add libm to
cpupower for generic CPPC view (Jeremy Linton)
- Remove conditional return with no effect from cpupower (Sang-Heon
Jeon)"
* tag 'pm-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (76 commits)
cpufreq: imx6q: fix out-of-bounds write when probed more than once
cpufreq: imx6q: fix devres accumulation across driver rebind
rust: cpufreq: Fix temporary write in Registration::bios_limit_callback
rust: cpufreq: Add CPUFREQ_TABLE_END as last table entry in TableBuilder::to_table
opp: Use clk_get_optional() to avoid leaving opp_table->clk as an error pointer
intel_idle: Avoid using deep idle states during initialization
cpupower: remove conditional return with no effect
cpufreq: intel_pstate: Adjust policy->cur in active mode to policy
cpufreq/amd-pstate: Document missing kernel-doc members
cpufreq/amd-pstate-ut: Add unit test for CPPC Performance Priority
cpufreq/amd-pstate-ut: Add unit test for "dynamic" EPP mode
cpufreq/amd-pstate: Reduce the scope of exported symbols
Documentation/amd-pstate: Update dynamic_epp documentation with new behavior
cpufreq/amd-pstate: Remove "amd_dynamic_epp" cmdline and "dynamic_epp" sysfs
cpufreq/amd-pstate: Add dynamic EPP as an "energy_performance_preference" mode
cpufreq/amd-pstate: Extract platform profile to EPP conversion into a helper
cpufreq/amd-pstate: Remove the defensive check for bios_min_perf
cpufreq/amd-pstate: Set min_limit_freq based on bios_min_perf
powercap: intel_rapl_tpmi: Handle PMU registration failure during probe
PM: sleep: Allow disabling DPM watchdog by default
...
|
||
|
Bartosz Golaszewski
|
146cc263e4 |
Linux 7.2
-----BEGIN PGP SIGNATURE----- iQFSBAABCgA8FiEEq68RxlopcLEwq+PEeb4+QwBBGIYFAmqCLGoeHHRvcnZhbGRz QGxpbnV4LWZvdW5kYXRpb24ub3JnAAoJEHm+PkMAQRiGJzYH/0SFjcgnk1Z3Km+3 2kEeGAMETajW41W7+5QQkuHk83UXDxigDRoD857/d8utK90GrZAoTMS9/6zF3tra ht4G1yc2x7/xgVLkWii54d/sp1LEWTRDntN95fzYZwbeAXwd0AcYBlKXZYHKl4t/ 4yZCgYPmYTkewaYdbyWNPiZvCwhBUl5k1E9i/drh5IJXdgXRcqoO86FY9JX+Ks9x r0g+d6RIiSbDfwzgRpkBn0TRnqzh2OeBfgyrsgGZO2axwlKcA7SP0vwwT6c6nOUI s8F2xXrqrUI75JbSI4YbdwOSvktwbtkz83idlRAYBOdxof3LJ6i2YaxrT8iG+KUH l7+e18M= =eQMh -----END PGP SIGNATURE----- Merge tag 'v7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux into gpio/for-next Linux 7.2 |
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|
Bartosz Golaszewski
|
aaef12abc4 |
regmap-irq: Provide IRQ resource request and release callbacks
The users which rely on regmap IRQ to create the IRQ chip may also want to have an additional tracking of the IRQ requests and releases. Provide a callback for them. -----BEGIN PGP SIGNATURE----- iQEzBAABCgAdFiEEreZoqmdXGLWf4p/qJNaLcl1Uh9AFAmpH1IMACgkQJNaLcl1U h9BbqQf+Kbxx8fZTq9/B2We7wNK70hyrMB1hsnyKRGSgJXBEr+V/k5C5iG+vzFjB syZLwk+Ghkk+FvtQbZsBrtkbY0kPyUz0xff+X6VyJO5ylFQs27RijTPwI1MheU+o baSOhwRaAs8FFJdBEdC611STaxYVuJKc2Z+fKPQGp54VpD0anXjgTFTe0SP6IrnT H7HtbQUIP3ZTtCLH2/Fq9ZZfeCmpOkeuvr5iMv/KrSI5uv6AkB8eCoTt1gnTSnNh 3XDkTlhT2EnoEEc2TCFi392rUcu+sv5sbld6PwaXlhJryLYz+95IXEWFYYwDL64c 3t0ElJvBRZIoOc9Ry589ElXxPbEQFQ== =d+FT -----END PGP SIGNATURE----- Merge tag 'regmap-irq-reqrel' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap into gpio/for-next regmap-irq: Provide IRQ resource request and release callbacks The users which rely on regmap IRQ to create the IRQ chip may also want to have an additional tracking of the IRQ requests and releases. Provide a callback for them. |
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|
Linus Torvalds
|
fff0150b02 |
vfs-7.3-rc1.kthread
Please consider pulling these changes from the signed vfs-7.3-rc1.kthread tag. Thanks! Christian -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQRAhzRXHqcMeLMyaSiRxhvAZXjcogUCan7RJQAKCRCRxhvAZXjc ohHuAQCFeGhxqsb44KhuJaWXewiXbefr6eg31lXmxgSfg0DILAD/Tw/WmpiUbX5M H+/jh6NmLKnQ/ADjlWFRy3R1K1Il3w4= =jwPP -----END PGP SIGNATURE----- Merge tag 'vfs-7.3-rc1.kthread' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs Pull kthread vfs updates from Christian Brauner: "This stops kernel threads from sharing filesystem state with userspace. This work is about 3 cycles old and has been in -next for about that time. When the kernel boots init_task creates PID 1 and then kthreadd. From that point every kthread and PID 1 share the same fs_struct. That is why pivot_root() has to rewrite the fs_struct of all kthreads. The rewriting exists so that kthreads can use init's filesystem state when they want to. It also means userspace can move the ground out from under the kernel. PID 1 now gets a completely separate fs_struct. All kthreads are anchored in a private SB_KERNMOUNT instance of nullfs that cannot be mounted on and cannot be used to follow other mounts. Userspace init can no longer affect kthread filesystem state and kthreads can no longer affect userspace fs state without explicit opting in to that. Path lookup from a kthread now fails by default. It makes it deliberately hard to offload security sensitive operations into init's filesystem state from a kthread. Places that legitimately need to look something up there opt in through the new scoped_with_init_fs() which temporarily overrides the caller's fs_struct with init's. usermodehelpers remain the only kernel tasks that genuinely share init's filesystem state, since they execute random binaries in the root filesystem (excellent...). The visible result is that /proc/2/root is a nullfs with an empty mountinfo while /proc/1/root is the real root" * tag 'vfs-7.3-rc1.kthread' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (26 commits) initramfs_test: use test init/exit hooks to override init fs fs: stop rewriting paths for PF_EXITING | PF_DUMPCORE fs: stop rewriting kthread fs structs fs: start all kthreads in nullfs nullfs: make nullfs multi-instance devtmpfs: create private mount namespace fs: add umh argument to struct kernel_clone_args fs: stop sharing fs_struct between init_task and pid 1 af_unix: use scoped_with_init_fs() for coredump socket lookup initramfs: use scoped_with_init_fs() for rootfs unpacking pnfs/blocklayout: use scoped_with_init_fs() for SCSI device lookup ksmbd: use scoped_with_init_fs() for VFS path operations ksmbd: use scoped_with_init_fs() for filesystem info path lookup ksmbd: use scoped_with_init_fs() for share path resolution fs: use scoped_with_init_fs() for kernel_read_file_from_path_initns() coredump: use scoped_with_init_fs() for coredump path resolution btrfs: use scoped_with_init_fs() for update_dev_time() scsi: target: use scoped_with_init_fs() for APTPL metadata scsi: target: use scoped_with_init_fs() for ALUA metadata crypto: ccp: use scoped_with_init_fs() for SEV file access ... |
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|
Andrey Golovko
|
00268f9452
|
regmap: sdw-mbq: don't call an unset readable_reg callback
regmap_sdw_mbq_poll_busy() decides whether to poll the Function Busy bit by calling ctx->readable_reg(), which is a straight copy of config->readable_reg. That callback is optional: regmap_readable() treats a NULL ->readable_reg as "every register is readable", and drivers rely on that. es9356 and tac5xx2-sdw both build an MBQ regmap without one. Since commit |
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|
Charles Keepax
|
ae7fd6ff4c
|
regmap: sdw-mbq: Fix swap of timeout and retry times
When polling Function Busy using read_poll_timeout() the total timeout
and retry delay arguments are swapped. This leads to only a single retry
being processed, it seems the existing users typically do succeed before
the first retry.
Swap the arguments over to ensure the correct polling time.
Reported-by: Ville Saarinen <wiza@saarinenkoti.fi>
Link: https://lore.kernel.org/linux-sound/ansTPGgVNoDJlA5r@opensource.cirrus.com/T/#m680731a2f307f1f5176b27ed5aa560ddc94e5d62
Fixes:
|
||
|
Rafael J. Wysocki
|
7544a367ad |
Merge branches 'pm-sleep', 'pm-runtime', 'pm-powercap' and 'pm-tools'
Merge updates related to system sleep handling and runtime PM, a power capping update, and power management tools updates for 7.3-rc1: - Rename the PM core module parameter prefix to "pm" and allow the PM transition (DPM) watchdog to be disabled by default (Tzung-Bi Shih) - Fix off-by-one in wakelocks number limit check in the system sleep sysfs interface (Haowen Tu) - Remove kernel-doc markings from helper descriptions in the core hibernation code (Adi Nata) - Use %pe to print error pointer values in the hibernation core (Ronan Marchal) - Fix memory leak in snapshot_write_next() error path (Malaya Kumar Rout) - Delay allocating and linking the next swap_map_page in the hibernation image saving code until another image page actually needs to be recorded (Haesung Kim) - Stop setting runtime_error on runtime resume callback failures to allow drivers to recover from resume issues (Praveen Talari) - Handle PMU registration failure during probe in the intel_rapl_tpmi driver (Sumeet Pawnikar) - Avoid optional imports in intel_pstate_tracer unless they are really needed (Yousef Alhouseen) - Add generic CPPC performance display to the cpupower utility, build and call CPPC information on non-AMD processors, make cpupower print kernel and hardware frequency information, and add libm to cpupower for generic CPPC view (Jeremy Linton) - Remove conditional return with no effect from cpupower (Sang-Heon Jeon) * pm-sleep: PM: sleep: Allow disabling DPM watchdog by default PM: sleep: Rename module parameters prefix to "pm" PM: hibernate: swap: defer linking the next map page PM: hibernate: Fix memory leak in snapshot_write_next() error path PM: hibernate: Use %pe to print error pointer values PM: hibernate: Remove kernel-doc markings from helper descriptions PM: sleep: Fix off-by-one in wakelocks number limit check * pm-runtime: PM: runtime: Only set runtime_error on suspend callback failures * pm-powercap: powercap: intel_rapl_tpmi: Handle PMU registration failure during probe * pm-tools: cpupower: remove conditional return with no effect tools/power: intel_pstate_tracer: avoid optional imports for help cpupower: Add libm to cpupower for generic CPPC view cpupower: Print kernel and hardware frequency information cpupower: Build and call CPPC information on non-AMD processors cpupower: Add generic CPPC performance display |
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Gregory Price
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5459c5be28 |
mm/memory_hotplug: add mhp_online_type_to_str() and export string helpers
Add mhp_online_type_to_str() as the inverse of mhp_online_type_from_str(), and export both so a driver can render and parse the memory online type through its own sysfs interface. Link: https://lore.kernel.org/20260712154505.3564379-3-gourry@gourry.net Signed-off-by: Gregory Price <gourry@gourry.net> Reviewed-by: Dave Jiang <dave.jiang@intel.com> Acked-by: David Hildenbrand (Arm) <david@kernel.org> Reviewed-by: Dan Williams <djbw@kernel.org> Cc: Alison Schofield <alison.schofield@intel.com> Cc: Danilo Krummrich <dakr@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Hannes Reinecke <hare@suse.de> Cc: Liam R. Howlett <liam@infradead.org> Cc: Lorenzo Stoakes <ljs@kernel.org> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@kernel.org> Cc: Oscar Salvador <osalvador@suse.de> Cc: Pankaj Gupta <pankaj.gupta@amd.com> Cc: "Rafael J. Wysocki" <rafael@kernel.org> Cc: Shuah Khan <shuah@kernel.org> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vishal Verma <vishal.l.verma@intel.com> Cc: Vlastimil Babka <vbabka@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
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Mukesh Ojha
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b48373c901 |
firmware_loader: do not queue completed sysfs fallback requests
fw_load_sysfs_fallback() calls device_add() before adding the fw_priv to
pending_fw_head. device_add() publishes the fallback loading interface, so
a userspace helper which discovers the device by scanning sysfs can write 0
to the loading attribute and complete the request before it is queued as
pending.
In that interleaving firmware_loading_store() calls fw_state_done() while
pending_list still points to itself, so it cannot remove an entry from
pending_fw_head. The subsequent unconditional list_add() then queues an
already-completed fw_priv. Once the request is released, pending_fw_head
can retain a pointer to freed memory and the next fallback request can
fault while validating the list.
Only in-flight fallback requests need suspend or reboot abort handling. If
the request is already DONE after device_add(), return success from the
fallback path without sending another uevent, waiting again, or queueing it
as pending. This preserves the invariant that pending_fw_head contains only
active fallback requests.
Fixes:
|
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Peter Ujfalusi
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4b05ccb17f
|
regcache: Sort the local copy of an unsorted reg_defaults array
regcache_lookup_reg() bsearch()es the reg_defaults array, which requires it to be sorted by ascending register address. Entries following a descending step are never found, so regcache_reg_needs_sync() reports that they need a sync and they are written to the device on every regcache_sync() even when they were never touched. Detect the misordering while reg_defaults is validated against the register stride and sort the local copy. The check needs no new loop and sort() only runs for the affected drivers, which are also warned about. Note that sort() is not stable, so for arrays with duplicated register addresses it remains unspecified which entry is found. Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com> Tested-by: Charles Keepax <ckeepax@opensource.cirrus.com> Link: https://patch.msgid.link/20260805132250.2637-1-peter.ujfalusi@linux.intel.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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Mark Brown
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9ed3d974a2
|
regcache: Use a consistent sort for defaults table
When we look up registers in the defaults table we use a binary search, and we have a regcache_sort_defaults() API to help drivers that constuct their defaults tables on the fly. Unfortunately the lookup and the sort don't use the same comparison function, and to make matters worse the comparison function used during lookups is written for signed register numbers rather than the unsigned ones we actually have so can produce suprising results when some of the addresses have the top bit set. Standardise on the more explicitly coded function to ensure consistent results. Reviewed-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Charles Keepax <ckeepax@opensource.cirrus.com> Tested-by: Charles Keepax <ckeepax@opensource.cirrus.com> Link: https://patch.msgid.link/20260805-regmap-regcache-sort-v1-1-162186aad8b9@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org> |
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Sang-Heon Jeon
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73e28dccd0 |
arch_numa: remove redundant nodemask clears in numa_init()
numa_init() clears numa_nodes_parsed, node_possible_map and
node_online_map, then calls numa_memblks_init(), which clears the same
nodemasks. Nothing uses them in between.
These clears have been redundant since commit
|
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Tzung-Bi Shih
|
dca82e209e |
PM: sleep: Allow disabling DPM watchdog by default
Introduce the "dpm_watchdog_enabled" module parameter to allow the DPM watchdog to be enabled or disabled at boot time and runtime. Additionally, introduce the CONFIG_DPM_WATCHDOG_ENABLED Kconfig option to set the default value of the module parameter at compile time. The primary motivation for this configurability resolves around Android GKI (Generic Kernel Image). We want to enable CONFIG_DPM_WATCHDOG in the GKI so the feature is available. However, because the GKI is shared across many different devices, we don't want to inadvertently affect devices that are unaware of this feature. This provides a way to compile it in, but keep it disabled by default for those devices via the kernel command line or module parameters. To maintain backward compatibility, CONFIG_DPM_WATCHDOG_ENABLED relies on `default y`. Previously, the DPM watchdog was always active if CONFIG_DPM_WATCHDOG was set. Defaulting this new option to 'y' ensures that the behavior remains unchanged for existing users and defconfigs when they upgrade. Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org> Link: https://patch.msgid.link/20260720030821.2780257-3-tzungbi@kernel.org Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Tzung-Bi Shih
|
058c1ac0e6 |
PM: sleep: Rename module parameters prefix to "pm"
Currently, the module parameters defined in drivers/base/power/main.c use the default prefix "main" (derived from the filename). The prefix is too generic and non-descriptive. Redefine MODULE_PARAM_PREFIX to "pm." to group the module parameters under the namespace instead. This makes the parameters more descriptive. Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org> Link: https://patch.msgid.link/20260720030821.2780257-2-tzungbi@kernel.org Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> |
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Yury Norov
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32dfaab71f |
cpu: Use sysfs_emit() for cpumask show callback
show_cpus_attr() is a sysfs show callback. Use sysfs_emit() and cpumask_pr_args() to emit the mask. This prepares for removing cpumap_print_to_pagebuf(). Signed-off-by: Yury Norov <ynorov@nvidia.com> |
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|
Xu Yang
|
0e6f8ccd46 |
device property: add test cases for fwnode_for_each_child_node()
Add test cases for fwnode_for_each_child_node() API. Test command: $ ./tools/testing/kunit/kunit.py run property-entry Signed-off-by: Xu Yang <xu.yang_2@nxp.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://patch.msgid.link/20260721105448.2109894-3-xu.yang_2@oss.nxp.com Signed-off-by: Danilo Krummrich <dakr@kernel.org> |
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|
Mark Brown
|
aba0c1ad72
|
regcache: Warn if regcache_sync() is called in cache_only mode
phucduc.bui@gmail.com <phucduc.bui@gmail.com> did a bit of work to help people avoid running into silly errors. Link: https://patch.msgid.link/20260720033238.52479-1-phucduc.bui@gmail.com |
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|
bui duc phuc
|
afc8e3ee83
|
regcache: Validate cache_only state in regcache_sync_region()
Add a WARN_ON() check to ensure regcache_sync_region() is not called while cache_only is enabled. Signed-off-by: bui duc phuc <phucduc.bui@gmail.com> Link: https://patch.msgid.link/20260720033238.52479-2-phucduc.bui@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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|
bui duc phuc
|
86fc3483a4
|
regcache: Warn if regcache_sync() is called in cache_only mode
Calling regcache_sync() while cache_only is enabled is invalid API usage, since writes are intentionally kept in the cache and cannot be synchronized to hardware. Document that callers must disable cache_only before calling regcache_sync(), and reject incorrect usage with a WARN_ON() and -EINVAL. Signed-off-by: bui duc phuc <phucduc.bui@gmail.com> Link: https://patch.msgid.link/20260720033238.52479-1-phucduc.bui@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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|
Bartosz Golaszewski
|
397f0a3958 |
driver core: platform: tests: add test cases for correct swnode removal
Extend the kunit module for platform devices with test cases verifying that the same software node can be added to platform devices repeatedly. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Link: https://patch.msgid.link/20260716-swnode-remove-on-dev-unreg-v8-5-5c2b8cc38c28@oss.qualcomm.com Signed-off-by: Danilo Krummrich <dakr@kernel.org> |
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|
Bartosz Golaszewski
|
7d80509ff0 |
driver core: platform: unify release path
With no drivers that manually assign software nodes to platform devices created with platform_device_alloc(), we can now unify the release path and remove platform_device_release_full(). Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Link: https://patch.msgid.link/20260716-swnode-remove-on-dev-unreg-v8-4-5c2b8cc38c28@oss.qualcomm.com Signed-off-by: Danilo Krummrich <dakr@kernel.org> |
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|
Bartosz Golaszewski
|
e6054f410c |
driver core: platform: amend the API contract for fwnode setters
Calling platform_device_set_fwnode() (and by extension: platform_device_set_of_node()) of platform_device_set_of_node_from_dev() for a dynamically allocated platform device whose primary firmware node is already assigned and is a software node leads to a resource leak as we never perform the corresponding call to software_node_notify_remove(). As there are currently no users for this special case - just disallow it and warn loudly if it ever happens. Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Link: https://patch.msgid.link/20260716-swnode-remove-on-dev-unreg-v8-1-5c2b8cc38c28@oss.qualcomm.com Signed-off-by: Danilo Krummrich <dakr@kernel.org> |
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|
Geert Uytterhoeven
|
4e63c0582e |
base: Remove unused DMA_FENCE_TRACE Kconfig symbol
Commit |
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|
Yuho Choi
|
45dfa00489 |
driver core: soc: Unregister bus on early device registration failure
soc_bus_register() registers the SoC bus before registering a deferred
early SoC device. If soc_device_register() fails in that path, the
function returns the error directly and leaves the bus registered.
Store the returned SoC device pointer explicitly so the success and
error cases are handled separately. On failure, clear soc_bus_registered
and unregister the bus before returning the error.
Fixes:
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Alban Bedel
|
ba3dedcf3b |
software node: Fix software_node_get_reference_args() with index -1
The bounds check for the index passed to
software_node_get_reference_args() was failing when passed UINT_MAX,
this in turn would lead to an out of bound access in the property
array. Fix the bound check to also cover the UINT_MAX case.
Fixes:
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Sang-Heon Jeon
|
38f5745f49 |
arch_numa: remove redundant nodemask clears in numa_init()
numa_init() clears numa_nodes_parsed, node_possible_map and
node_online_map, then calls numa_memblks_init(), which clears the same
nodemasks. Nothing uses them in between.
These clears have been redundant since commit
|
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|
Yuho Choi
|
8cfe7ad274 |
driver core: attribute_container: Unwind device_add() on attr failure
attribute_container_add_class_device() first calls device_add() and then creates the container attributes. If attribute_container_add_attrs() fails, the helper returns the error with the class device still registered. Callers use an error from this helper as a failed add and do not call device_del() on that path. Undo the successful device_add() before returning the attribute creation error. Signed-off-by: Yuho Choi <dbgh9129@gmail.com> Link: https://patch.msgid.link/20260608172717.88657-1-dbgh9129@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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|
Ewan D. Milne
|
6e328b4a20 |
drivers: base: Remove statistics group if encryption group not created
If transport_add_class_device() gets an error from sysfs_create_group() when
creating the encryption group, it does not remove the statistics group in
the error path. Adjust the error path to do this properly.
v2: Only remove statistics group if tcont->statistics is non-NULL
Fixes:
|
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|
Breno Leitao
|
274259391c |
cacheinfo: don't propagate DT/ACPI error when arch supplies info (arm64)
cache_setup_properties() sets use_arch_info = true when DT/ACPI
provide no cache nodes and the arch can derive the topology from
CPU registers (e.g. arm64 reading CLIDR_EL1), but still returns the
original -ENOENT. cache_shared_cpu_map_setup() bails on that error
before the new flag can take effect, so the first CPU brought online
always trips a misleading warning:
cacheinfo: Unable to detect cache hierarchy for CPU 0
Subsequent CPUs skip cache_setup_properties() entirely because
use_arch_info is now true, which is why only CPU0 hits it. This is
reproducible on arm64 with the QEMU 'virt' machine, whose default DT
has no cache nodes.
Clear ret after setting use_arch_info so the caller proceeds and
populates the shared cpu map via the arch-supplied leaves.
Fixes:
|
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|
Andy Shevchenko
|
c37ab60d55 |
device property: Refactor to use RAII approach
In a couple of functions code can be made cleaner with help of __free() macro. Refactor these to use RAII approach. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Link: https://patch.msgid.link/20260611203537.1786399-3-andriy.shevchenko@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Xu Yang
|
1900692555 |
device property: fix infinite loop in fwnode_for_each_child_node()
When iterate over children of a fwnode that has a secondary fwnode,
fwnode_get_next_child_node() can enter an infinite loop if the secondary
fwnode has more than one child.
Parent Child
(Primary fwnode) FWa: {FWa1, FWa2, FWa3}
(Secondary fwnode) FWb: {FWb1, FWb2}
In this case:
┌─> fwnode_get_next_child_node(FWa, FWa1)
│ - fwnode_call_ptr_op(FWa, get_next_child_node, FWa1) returns FWa2
│
│ ...
│
│ fwnode_get_next_child_node(FWa, FWa3)
│ - fwnode_call_ptr_op(FWa, get_next_child_node, FWa3) returns NULL
│ - fwnode_call_ptr_op(FWb, get_next_child_node, FWa3) returns FWb1
│
│ fwnode_get_next_child_node(FWa, FWb1)
│ - fwnode_call_ptr_op(FWa, get_next_child_node, FWb1) returns FWa1
└────┘
This cause fwnode_for_each_child_node() to loop indefinitely, reapeatedly
output {FWa1, FWa2, FWa3, FWb1, FWa1, ...}.
The root cause is that when the current child (FWb1) belongs to the
secondary fwnode, calling get_next_child_node() on the parimary fwnode
incorrectly returns the first child (FWa1) again instead of NULL.
Fix this by dynamically checking the parent fwnode of the current child
before calling get_next_child_node(). This approach follows the pattern
established in commit
|
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Xu Yang
|
1086492121 |
driver core: avoid repeatedly printing the same 'Fixed dependency' log
The "Fixed dependency cycle(s) with ..." log is printed for each cycle finding process. In particular, the same cycle may be parsed many times during the proxy link setup. For example, if /soc/bus@4c000000/usb@4c100000 is a devicetree structure and node usb@4c100000 is in a cycle, then for each device registration (soc, 4c000000.bus and 4c100000.usb), fw_devlink_create_devlink() will find the same cycle and print a log. The repeat logs are redundant and may cause confusion for the user. Move the pr_debug() to __fwnode_link_cycle() and avoid printing the log if it has already been printed. Signed-off-by: Xu Yang <xu.yang_2@nxp.com> Link: https://patch.msgid.link/20260509111728.4123331-1-xu.yang_2@nxp.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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Danilo Krummrich
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2b74f1f202 |
software node: provide support for fw_devlink
This series extends software node support to use fw_devlink and adds test coverage for the new behaviour. This is a stable tag for other trees to merge. -----BEGIN PGP SIGNATURE----- iHUEABYKAB0WIQS2q/xV6QjXAdC7k+1FlHeO1qrKLgUCaleyHAAKCRBFlHeO1qrK LkGKAP9isPMqr2WJTbS8I65WDErXk3z8741AGELlUAkn3M3sUwD/X9tCZcFdTy8e u7EyxBvnXb9TemwJFJbQmCZju/6yngg= =e78c -----END PGP SIGNATURE----- Merge patch series "software node: provide support for fw_devlink" Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> says: Currently only devicetree systems have their devices' probe ordered against their suppliers automatically by fw_devlink. Software nodes have lately been used extensively treewide to describe references to resource suppliers: most notably, the GPIO subsystem uses it in many places. Now that the conversion of "dangling" GPIO chip software nodes to using real links is almost done, it makes sense to ensure no needless probe deferrals by implementing the add_links() callback from the fwnode interface. This series extends software node support to use fw_devlink and adds test coverage for the new behaviour. Caveats: a supplier software node must be registered before the consumer device is added, If the swnode is registered after the consumer was added, add_links() has already run and set FWNODE_FLAG_LINKS_ADDED, so the late supplier is missed. Graph/remote- endpoint ordering is left out for now as well as there are no known users. Link: https://patch.msgid.link/20260713-swnode-fw-devlink-v4-0-d4f2dee27ad9@oss.qualcomm.com Signed-off-by: Danilo Krummrich <dakr@kernel.org> |
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Bartosz Golaszewski
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eecba59787 |
software node: add kunit tests for fw_devlink support
Add a kunit test suite for fw_devlink support for software nodes. Most cases call add_links() directly and inspect the resulting fwnode supplier/consumer lists: a single reference, multiple references, a reference to an unregistered node, a "remote-endpoint" reference and a reference array. The last case is end-to-end - it registers real consumer and supplier platform devices together with their drivers, adds the consumer first and checks that fw_devlink defers its probe until the supplier has been bound. Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Tested-by: David Gow <david@davidgow.net> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Link: https://patch.msgid.link/20260713-swnode-fw-devlink-v4-3-d4f2dee27ad9@oss.qualcomm.com Signed-off-by: Danilo Krummrich <dakr@kernel.org> |
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Bartosz Golaszewski
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37e5866759 |
software node: add fw_devlink support
Software nodes can be used to describe supplier-consumer relationships between devices they represent using reference property entries. Unlike for OF-nodes, driver core cannot yet use these references to create a probe order that avoids needless probe deferrals on missing providers. Implement software_node_add_links() modelled on of_fwnode_add_links(). For every DEV_PROP_REF property we resolve each referenced supplier and create an fwnode link from the node to it. The driver core later promotes these to device links and defers the consumer until the suppliers are ready. There's no allowlist like the one DT needs - devicetree phandles appear in plenty of non-supplier contexts, but a software node only carries a reference property when its author explicitly points at another node, so we treat every reference as an intentional supplier dependency and link all of them. Graph "remote-endpoint" references are skipped for now: they go 2-ways between endpoint nodes and would create graph cycles without the port-parent lifting DT does via get_con_dev(). References to suppliers that aren't registered yet and self-references are ignored. fw_devlink resolves the supplier device through fwnode->dev but the core only records the owning device on the primary fwnode. When the software node is a device's secondary fwnode, mirror the device pointer onto it in software_node_notify() so the consumer can actually find the supplier instead of deferring forever. While at it: purge the fwnode links in software_node_release() now that software nodes can own them. Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com> Link: https://patch.msgid.link/20260713-swnode-fw-devlink-v4-2-d4f2dee27ad9@oss.qualcomm.com Signed-off-by: Danilo Krummrich <dakr@kernel.org> |
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bui duc phuc
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a7d168db6b
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regcache: Mark cache dirty if selector register rewrite fails
After a successful cache synchronization, regcache_sync() clears cache_dirty. If rewriting a selector register later fails, the cache and hardware become inconsistent while the cache still appears clean. Update cache_dirty to reflect the cache and hardware state when selector register rewriting fails. Signed-off-by: bui duc phuc <phucduc.bui@gmail.com> Link: https://patch.msgid.link/20260713050312.38729-3-phucduc.bui@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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bui duc phuc
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85da24aac1
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regcache: Preserve cache synchronization errors in regcache_sync()
regcache_sync() currently stores the return value from both cache synchronization and selector register rewriting in the same variable. As a result, a successful selector register rewrite can overwrite an earlier cache synchronization error, causing regcache_sync() to return success even though synchronization failed. Track the two operations with separate return variables and preserve the cache synchronization error. Errors from rewriting selector registers are returned only if cache synchronization completed successfully. Signed-off-by: bui duc phuc <phucduc.bui@gmail.com> Link: https://patch.msgid.link/20260713050312.38729-2-phucduc.bui@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org> |
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Dmitry Torokhov
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1160c2208f |
firmware_loader: builtin: fail build on empty firmware
If an empty firmware file is supplied via CONFIG_EXTRA_FIRMWARE, the build currently succeeds but creates an empty section. While the firmware loader will not return such sections it is better to avoid adding them in the first place. Add a compile-time size check to the filechk_fwbin macro to abort the build early if a 0-size firmware is encountered. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Link: https://patch.msgid.link/20260426043041.649202-2-dmitry.torokhov@gmail.com [ Use 'exit 1' to properly fail the build. - Danilo ] Signed-off-by: Danilo Krummrich <dakr@kernel.org> |
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Dmitry Torokhov
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d059966c0c |
firmware_loader: builtin: ignore 0-size firmware
Currently, the builtin firmware loader allows 0-size firmware to be returned successfully to drivers. This differs from all other loading mechanisms (filesystem, sysfs fallback) which reject 0-byte files, and forces drivers to add boilerplate size checks. Modify firmware_request_builtin() to reject 0-size firmware. This will also result in firmware loader falling back to other mechanisms if an empty built-in firmware is present. Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Link: https://patch.msgid.link/20260426043041.649202-1-dmitry.torokhov@gmail.com Signed-off-by: Danilo Krummrich <dakr@kernel.org> |