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Jakub Kicinski
4f10f1dfb2 net: remove ISDN subsystem and Bluetooth CMTP 
Remove the ISDN (mISDN, CAPI) subsystem and Bluetooth CMTP protocol
from the kernel tree.

ISDN is a pretty old technology and it's unclear whether anyone still
uses it. I went over the last few years of git history and all the
commits are either tree-wide conversions or syzbot/static analyzer
fixes.

When we discussed removal in the past IIRC there were some concerns
about ISDN still being used in parts of Germany. Unfortunately, the
code base is quite old, none of the current maintainers are familiar
with it and AI tools will have a field day finding bugs here.

Delete this code and preserve it in an out-of-tree repository
for any remaining users:
https://github.com/linux-netdev/mod-orphan

UAPI constants AF_ISDN/PF_ISDN and the SELinux isdn_socket class
are preserved for ABI stability, but the rest of uAPI is removed.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Stephen Hemminger <stephen@networkplumber.org>
Acked-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260421022108.1299678-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
 2026-04-23 10:24:02 -07:00
Jakub Kicinski
6d5431555d caif: remove CAIF NETWORK LAYER 
Remove CAIF (Communication CPU to Application CPU Interface), the
ST-Ericsson modem protocol. The subsystem has been orphaned since 2013.
The last meaningful changes from the maintainers were in March 2013:
  a8c7687bf2 ("caif_virtio: Check that vringh_config is not null")
  b2273be8d2 ("caif_virtio: Use vringh_notify_enable correctly")
  0d2e1a2926 ("caif_virtio: Introduce caif over virtio")

Not-so-coincidentally, according to "the Internet" ST-Ericsson officially
shut down its modem joint venture in Aug 2013.

If anyone is using this code please yell!

In the 13 years since, the code has accumulated 200 non-merge commits,
of which 71 were cross-tree API changes, 21 carried Fixes: tags, and
the remaining ~110 were cleanups, doc conversions, treewide refactors,
and one partial removal (caif_hsi, ca75bcf0a8).

We are still getting fixes to this code, in the last 10 days there were
3 reports on security@ about CAIF that I have been CCed on.

UAPI constants (AF_CAIF, ARPHRD_CAIF, N_CAIF, VIRTIO_ID_CAIF) and the
SELinux classmap entry are intentionally kept for ABI stability.

Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260416182829.1440262-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-04-23 10:23:44 -07:00
Linus Torvalds
1f5ffc6721 Fix mismerge of the arm64 / timer-core interrupt handling changes 
Commit c43267e679 ("Merge tag 'arm64-upstream' of git://...") had a
conflict in the irq entry/exit code due to commit c5538d0141 ("entry:
Split kernel mode logic from irqentry_{enter,exit}()") having moved the
core code in irqentry_enter/exit() from kernel/entry/common.c into
helper inline functions in include/linux/irq-entry-common.h.

On the other side of the merge, the timer-core code had introduced
deferred hrtimer rearming infrastructure in commit 0e98eb1481 ("entry:
Prepare for deferred hrtimer rearming"), adding two calls to
hrtimer_rearm_deferred() in irqentry_enter().

When merging the two, moving the two calls to the new location wasn't a
problem, but afterwards I had made the mistake of looking what had
happened in linux-next.  And linux-next had a very different merge
resolution in commit 04f02dc3ea74 ("Merge tag 'entry-for-arm64-26-04-08'
into sched/hrtick"), which had unified the two calls into one single
call-site in irqentry_exit_to_kernel_mode_preempt().

And that merge resolution looked cleverer than the straightforward one I
had done, so I re-did my merge the way it had been done in linux-next.

But it turns out nobody apparently tests linux-next, and the merge in
linux-next was just wrong.

The difference is that hrtimer_rearm_deferred() doesn't get called at
all for the case when state.exit_rcu is true, and the boot will
typically fail due to timers not triggering correctly.

So this undoes the "clever" merge, and does the straightforward one
instead.

Fixes: c43267e679 ("Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux"
Reported-and-tested-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Link: https://lore.kernel.org/all/CAADnVQJ=MoiX4=guPWhL9vtnAELkpNx=GNm8RA1-aV424UFz2A@mail.gmail.com/
Link: https://lore.kernel.org/all/CAHk-=wg8+BER4VyFKG3rnPi2gXxbf-jbHS=EU+xhFqGVQfbutw@mail.gmail.com/
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2026-04-14 23:03:02 -07:00
Linus Torvalds
5c0f43e853 kernel-7.1-rc1.misc 
Please consider pulling these changes from the signed kernel-7.1-rc1.misc tag.
 
 Thanks!
 Christian
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Merge tag 'kernel-7.1-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull pid_namespace updates from Christian Brauner:

 - pid_namespace: make init creation more flexible

   Annotate ->child_reaper accesses with {READ,WRITE}_ONCE() to protect
   the unlocked readers from cpu/compiler reordering, and enforce that
   pid 1 in a pid namespace is always the first allocated pid (the
   set_tid path already required this).

   On top of that, allow opening pid_for_children before the pid
   namespace init has been created. This lets one process create the pid
   namespace and a different process create the init via setns(), which
   makes clone3(set_tid) usable in all cases evenly and is particularly
   useful to CRIU when restoring nested containers.

   A new selftest covers both the basic create-pidns-then-init flow and
   the cross-process variant, and a MAINTAINERS entry for the pid
   namespace code is added.

 - unrelated signal cleanup: update outdated comment for the removed
   freezable_schedule()

* tag 'kernel-7.1-rc1.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  signal: update outdated comment for removed freezable_schedule()
  MAINTAINERS: add a pid namespace entry
  selftests: Add tests for creating pidns init via setns
  pid_namespace: allow opening pid_for_children before init was created
  pid: check init is created first after idr alloc
  pid_namespace: avoid optimization of accesses to ->child_reaper
 2026-04-14 20:28:40 -07:00
Linus Torvalds
7c8a4671dc vfs-7.1-rc1.mount.v2 
Please consider pulling these changes from the signed vfs-7.1-rc1.mount.v2 tag.
 
 Thanks!
 Christian
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Merge tag 'vfs-7.1-rc1.mount.v2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

Pull vfs mount updates from Christian Brauner:

 - Add FSMOUNT_NAMESPACE flag to fsmount() that creates a new mount
   namespace with the newly created filesystem attached to a copy of the
   real rootfs. This returns a namespace file descriptor instead of an
   O_PATH mount fd, similar to how OPEN_TREE_NAMESPACE works for
   open_tree().

   This allows creating a new filesystem and immediately placing it in a
   new mount namespace in a single operation, which is useful for
   container runtimes and other namespace-based isolation mechanisms.

   This accompanies OPEN_TREE_NAMESPACE and avoids a needless detour via
   OPEN_TREE_NAMESPACE to get the same effect. Will be especially useful
   when you mount an actual filesystem to be used as the container
   rootfs.

 - Currently, creating a new mount namespace always copies the entire
   mount tree from the caller's namespace. For containers and sandboxes
   that intend to build their mount table from scratch this is wasteful:
   they inherit a potentially large mount tree only to immediately tear
   it down.

   This series adds support for creating a mount namespace that contains
   only a clone of the root mount, with none of the child mounts. Two
   new flags are introduced:

     - CLONE_EMPTY_MNTNS (0x400000000) for clone3(), using the 64-bit flag space
     - UNSHARE_EMPTY_MNTNS (0x00100000) for unshare()

   Both flags imply CLONE_NEWNS. The resulting namespace contains a
   single nullfs root mount with an immutable empty directory. The
   intended workflow is to then mount a real filesystem (e.g., tmpfs)
   over the root and build the mount table from there.

 - Allow MOVE_MOUNT_BENEATH to target the caller's rootfs, allowing to
   switch out the rootfs without pivot_root(2).

   The traditional approach to switching the rootfs involves
   pivot_root(2) or a chroot_fs_refs()-based mechanism that atomically
   updates fs->root for all tasks sharing the same fs_struct. This has
   consequences for fork(), unshare(CLONE_FS), and setns().

   This series instead decomposes root-switching into individually
   atomic, locally-scoped steps:

	fd_tree = open_tree(-EBADF, "/newroot", OPEN_TREE_CLONE | OPEN_TREE_CLOEXEC);
	fchdir(fd_tree);
	move_mount(fd_tree, "", AT_FDCWD, "/", MOVE_MOUNT_BENEATH | MOVE_MOUNT_F_EMPTY_PATH);
	chroot(".");
	umount2(".", MNT_DETACH);

   Since each step only modifies the caller's own state, the
   fork/unshare/setns races are eliminated by design.

   A key step to making this possible is to remove the locked mount
   restriction. Originally MOVE_MOUNT_BENEATH doesn't support mounting
   beneath a mount that is locked. The locked mount protects the
   underlying mount from being revealed. This is a core mechanism of
   unshare(CLONE_NEWUSER | CLONE_NEWNS). The mounts in the new mount
   namespace become locked. That effectively makes the new mount table
   useless as the caller cannot ever get rid of any of the mounts no
   matter how useless they are.

   We can lift this restriction though. We simply transfer the locked
   property from the top mount to the mount beneath. This works because
   what we care about is to protect the underlying mount aka the parent.
   The mount mounted between the parent and the top mount takes over the
   job of protecting the parent mount from the top mount mount. This
   leaves us free to remove the locked property from the top mount which
   can consequently be unmounted:

	unshare(CLONE_NEWUSER | CLONE_NEWNS)

   and we inherit a clone of procfs on /proc then currently we cannot
   unmount it as:

	umount -l /proc

   will fail with EINVAL because the procfs mount is locked.

   After this series we can now do:

	mount --beneath -t tmpfs tmpfs /proc
	umount -l /proc

   after which a tmpfs mount has been placed beneath the procfs mount.
   The tmpfs mount has become locked and the procfs mount has become
   unlocked.

   This means you can safely modify an inherited mount table after
   unprivileged namespace creation.

   Afterwards we simply make it possible to move a mount beneath the
   rootfs allowing to upgrade the rootfs.

   Removing the locked restriction makes this very useful for containers
   created with unshare(CLONE_NEWUSER | CLONE_NEWNS) to reshuffle an
   inherited mount table safely and MOVE_MOUNT_BENEATH makes it possible
   to switch out the rootfs instead of using the costly pivot_root(2).

* tag 'vfs-7.1-rc1.mount.v2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  selftests/namespaces: remove unused utils.h include from listns_efault_test
  selftests/fsmount_ns: add missing TARGETS and fix cap test
  selftests/empty_mntns: fix wrong CLONE_EMPTY_MNTNS hex value in comment
  selftests/empty_mntns: fix statmount_alloc() signature mismatch
  selftests/statmount: remove duplicate wait_for_pid()
  mount: always duplicate mount
  selftests/filesystems: add MOVE_MOUNT_BENEATH rootfs tests
  move_mount: allow MOVE_MOUNT_BENEATH on the rootfs
  move_mount: transfer MNT_LOCKED
  selftests/filesystems: add clone3 tests for empty mount namespaces
  selftests/filesystems: add tests for empty mount namespaces
  namespace: allow creating empty mount namespaces
  selftests: add FSMOUNT_NAMESPACE tests
  selftests/statmount: add statmount_alloc() helper
  tools: update mount.h header
  mount: add FSMOUNT_NAMESPACE
  mount: simplify __do_loopback()
  mount: start iterating from start of rbtree
 2026-04-14 19:59:25 -07:00
Linus Torvalds
91a4855d6c Networking changes for 7.1. 
Core & protocols
 ----------------
 
  - Support HW queue leasing, allowing containers to be granted access
    to HW queues for zero-copy operations and AF_XDP.
 
  - Number of code moves to help the compiler with inlining.
    Avoid output arguments for returning drop reason where possible.
 
  - Rework drop handling within qdiscs to include more metadata
    about the reason and dropping qdisc in the tracepoints.
 
  - Remove the rtnl_lock use from IP Multicast Routing.
 
  - Pack size information into the Rx Flow Steering table pointer
    itself. This allows making the table itself a flat array of u32s,
    thus making the table allocation size a power of two.
 
  - Report TCP delayed ack timer information via socket diag.
 
  - Add ip_local_port_step_width sysctl to allow distributing the randomly
    selected ports more evenly throughout the allowed space.
 
  - Add support for per-route tunsrc in IPv6 segment routing.
 
  - Start work of switching sockopt handling to iov_iter.
 
  - Improve dynamic recvbuf sizing in MPTCP, limit burstiness and avoid
    buffer size drifting up.
 
  - Support MSG_EOR in MPTCP.
 
  - Add stp_mode attribute to the bridge driver for STP mode selection.
    This addresses concerns about call_usermodehelper() usage.
 
  - Remove UDP-Lite support (as announced in 2023).
 
  - Remove support for building IPv6 as a module.
    Remove the now unnecessary function calling indirection.
 
 Cross-tree stuff
 ----------------
 
  - Move Michael MIC code from generic crypto into wireless,
    it's considered insecure but some WiFi networks still need it.
 
 Netfilter
 ---------
 
  - Switch nft_fib_ipv6 module to no longer need temporary dst_entry
    object allocations by using fib6_lookup() + RCU.
    Florian W reports this gets us ~13% higher packet rate.
 
  - Convert IPVS's global __ip_vs_mutex to per-net service_mutex and
    switch the service tables to be per-net. Convert some code that
    walks the service lists to use RCU instead of the service_mutex.
 
  - Add more opinionated input validation to lower security exposure.
 
  - Make IPVS hash tables to be per-netns and resizable.
 
 Wireless
 --------
 
  - Finished assoc frame encryption/EPPKE/802.1X-over-auth.
 
  - Radar detection improvements.
 
  - Add 6 GHz incumbent signal detection APIs.
 
  - Multi-link support for FILS, probe response templates and
    client probing.
 
  - New APIs and mac80211 support for NAN (Neighbor Aware Networking,
    aka Wi-Fi Aware) so less work must be in firmware.
 
 Driver API
 ----------
 
  - Add numerical ID for devlink instances (to avoid having to create
    fake bus/device pairs just to have an ID). Support shared devlink
    instances which span multiple PFs.
 
  - Add standard counters for reporting pause storm events
    (implement in mlx5 and fbnic).
 
  - Add configuration API for completion writeback buffering
    (implement in mana).
 
  - Support driver-initiated change of RSS context sizes.
 
  - Support DPLL monitoring input frequency (implement in zl3073x).
 
  - Support per-port resources in devlink (implement in mlx5).
 
 Misc
 ----
 
  - Expand the YAML spec for Netfilter.
 
 Drivers
 -------
 
  - Software:
    - macvlan: support multicast rx for bridge ports with shared source
      MAC address
    - team: decouple receive and transmit enablement for IEEE 802.3ad
      LACP "independent control"
 
  - Ethernet high-speed NICs:
    - nVidia/Mellanox:
      - support high order pages in zero-copy mode (for payload
        coalescing)
      - support multiple packets in a page (for systems with 64kB pages)
    - Broadcom 25-400GE (bnxt):
      - implement XDP RSS hash metadata extraction
      - add software fallback for UDP GSO, lowering the IOMMU cost
    - Broadcom 800GE (bnge):
      - add link status and configuration handling
      - add various HW and SW statistics
    - Marvell/Cavium:
      - NPC HW block support for cn20k
    - Huawei (hinic3):
      - add mailbox / control queue
      - add rx VLAN offload
      - add driver info and link management
 
  - Ethernet NICs:
    - Marvell/Aquantia:
      - support reading SFP module info on some AQC100 cards
    - Realtek PCI (r8169):
      - add support for RTL8125cp
    - Realtek USB (r8152):
      - support for the RTL8157 5Gbit chip
      - add 2500baseT EEE status/configuration support
 
  - Ethernet NICs embedded and off-the-shelf IP:
    - Synopsys (stmmac):
      - cleanup and reorganize SerDes handling and PCS support
      - cleanup descriptor handling and per-platform data
      - cleanup and consolidate MDIO defines and handling
      - shrink driver memory use for internal structures
      - improve Tx IRQ coalescing
      - improve TCP segmentation handling
      - add support for Spacemit K3
    - Cadence (macb):
      - support PHYs that have inband autoneg disabled with GEM
      - support IEEE 802.3az EEE
      - rework usrio capabilities and handling
    - AMD (xgbe):
      - improve power management for S0i3
      - improve TX resilience for link-down handling
 
  - Virtual:
    - Google cloud vNIC:
      - support larger ring sizes in DQO-QPL mode
      - improve HW-GRO handling
      - support UDP GSO for DQO format
    - PCIe NTB:
      - support queue count configuration
 
  - Ethernet PHYs:
    - automatically disable PHY autonomous EEE if MAC is in charge
    - Broadcom:
      - add BCM84891/BCM84892 support
    - Micrel:
      - support for LAN9645X internal PHY
    - Realtek:
      - add RTL8224 pair order support
      - support PHY LEDs on RTL8211F-VD
      - support spread spectrum clocking (SSC)
    - Maxlinear:
      - add PHY-level statistics via ethtool
 
  - Ethernet switches:
    - Maxlinear (mxl862xx):
      - support for bridge offloading
      - support for VLANs
      - support driver statistics
 
  - Bluetooth:
    - large number of fixes and new device IDs
    - Mediatek:
      - support MT6639 (MT7927)
      - support MT7902 SDIO
 
  - WiFi:
    - Intel (iwlwifi):
      - UNII-9 and continuing UHR work
    - MediaTek (mt76):
      - mt7996/mt7925 MLO fixes/improvements
      - mt7996 NPU support (HW eth/wifi traffic offload)
    - Qualcomm (ath12k):
      - monitor mode support on IPQ5332
      - basic hwmon temperature reporting
      - support IPQ5424
    - Realtek:
      - add USB RX aggregation to improve performance
      - add USB TX flow control by tracking in-flight URBs
 
  - Cellular:
    - IPA v5.2 support
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'net-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "Core & protocols:

   - Support HW queue leasing, allowing containers to be granted access
     to HW queues for zero-copy operations and AF_XDP

   - Number of code moves to help the compiler with inlining. Avoid
     output arguments for returning drop reason where possible

   - Rework drop handling within qdiscs to include more metadata about
     the reason and dropping qdisc in the tracepoints

   - Remove the rtnl_lock use from IP Multicast Routing

   - Pack size information into the Rx Flow Steering table pointer
     itself. This allows making the table itself a flat array of u32s,
     thus making the table allocation size a power of two

   - Report TCP delayed ack timer information via socket diag

   - Add ip_local_port_step_width sysctl to allow distributing the
     randomly selected ports more evenly throughout the allowed space

   - Add support for per-route tunsrc in IPv6 segment routing

   - Start work of switching sockopt handling to iov_iter

   - Improve dynamic recvbuf sizing in MPTCP, limit burstiness and avoid
     buffer size drifting up

   - Support MSG_EOR in MPTCP

   - Add stp_mode attribute to the bridge driver for STP mode selection.
     This addresses concerns about call_usermodehelper() usage

   - Remove UDP-Lite support (as announced in 2023)

   - Remove support for building IPv6 as a module. Remove the now
     unnecessary function calling indirection

  Cross-tree stuff:

   - Move Michael MIC code from generic crypto into wireless, it's
     considered insecure but some WiFi networks still need it

  Netfilter:

   - Switch nft_fib_ipv6 module to no longer need temporary dst_entry
     object allocations by using fib6_lookup() + RCU.

     Florian W reports this gets us ~13% higher packet rate

   - Convert IPVS's global __ip_vs_mutex to per-net service_mutex and
     switch the service tables to be per-net. Convert some code that
     walks the service lists to use RCU instead of the service_mutex

   - Add more opinionated input validation to lower security exposure

   - Make IPVS hash tables to be per-netns and resizable

  Wireless:

   - Finished assoc frame encryption/EPPKE/802.1X-over-auth

   - Radar detection improvements

   - Add 6 GHz incumbent signal detection APIs

   - Multi-link support for FILS, probe response templates and client
     probing

   - New APIs and mac80211 support for NAN (Neighbor Aware Networking,
     aka Wi-Fi Aware) so less work must be in firmware

  Driver API:

   - Add numerical ID for devlink instances (to avoid having to create
     fake bus/device pairs just to have an ID). Support shared devlink
     instances which span multiple PFs

   - Add standard counters for reporting pause storm events (implement
     in mlx5 and fbnic)

   - Add configuration API for completion writeback buffering (implement
     in mana)

   - Support driver-initiated change of RSS context sizes

   - Support DPLL monitoring input frequency (implement in zl3073x)

   - Support per-port resources in devlink (implement in mlx5)

  Misc:

   - Expand the YAML spec for Netfilter

  Drivers

   - Software:
      - macvlan: support multicast rx for bridge ports with shared
        source MAC address
      - team: decouple receive and transmit enablement for IEEE 802.3ad
        LACP "independent control"

   - Ethernet high-speed NICs:
      - nVidia/Mellanox:
         - support high order pages in zero-copy mode (for payload
           coalescing)
         - support multiple packets in a page (for systems with 64kB
           pages)
      - Broadcom 25-400GE (bnxt):
         - implement XDP RSS hash metadata extraction
         - add software fallback for UDP GSO, lowering the IOMMU cost
      - Broadcom 800GE (bnge):
         - add link status and configuration handling
         - add various HW and SW statistics
      - Marvell/Cavium:
         - NPC HW block support for cn20k
      - Huawei (hinic3):
         - add mailbox / control queue
         - add rx VLAN offload
         - add driver info and link management

   - Ethernet NICs:
      - Marvell/Aquantia:
         - support reading SFP module info on some AQC100 cards
      - Realtek PCI (r8169):
         - add support for RTL8125cp
      - Realtek USB (r8152):
         - support for the RTL8157 5Gbit chip
         - add 2500baseT EEE status/configuration support

   - Ethernet NICs embedded and off-the-shelf IP:
      - Synopsys (stmmac):
         - cleanup and reorganize SerDes handling and PCS support
         - cleanup descriptor handling and per-platform data
         - cleanup and consolidate MDIO defines and handling
         - shrink driver memory use for internal structures
         - improve Tx IRQ coalescing
         - improve TCP segmentation handling
         - add support for Spacemit K3
      - Cadence (macb):
         - support PHYs that have inband autoneg disabled with GEM
         - support IEEE 802.3az EEE
         - rework usrio capabilities and handling
      - AMD (xgbe):
         - improve power management for S0i3
         - improve TX resilience for link-down handling

   - Virtual:
      - Google cloud vNIC:
         - support larger ring sizes in DQO-QPL mode
         - improve HW-GRO handling
         - support UDP GSO for DQO format
      - PCIe NTB:
         - support queue count configuration

   - Ethernet PHYs:
      - automatically disable PHY autonomous EEE if MAC is in charge
      - Broadcom:
         - add BCM84891/BCM84892 support
      - Micrel:
         - support for LAN9645X internal PHY
      - Realtek:
         - add RTL8224 pair order support
         - support PHY LEDs on RTL8211F-VD
         - support spread spectrum clocking (SSC)
      - Maxlinear:
         - add PHY-level statistics via ethtool

   - Ethernet switches:
      - Maxlinear (mxl862xx):
         - support for bridge offloading
         - support for VLANs
         - support driver statistics

   - Bluetooth:
      - large number of fixes and new device IDs
      - Mediatek:
         - support MT6639 (MT7927)
         - support MT7902 SDIO

   - WiFi:
      - Intel (iwlwifi):
         - UNII-9 and continuing UHR work
      - MediaTek (mt76):
         - mt7996/mt7925 MLO fixes/improvements
         - mt7996 NPU support (HW eth/wifi traffic offload)
      - Qualcomm (ath12k):
         - monitor mode support on IPQ5332
         - basic hwmon temperature reporting
         - support IPQ5424
      - Realtek:
         - add USB RX aggregation to improve performance
         - add USB TX flow control by tracking in-flight URBs

   - Cellular:
      - IPA v5.2 support"

* tag 'net-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1561 commits)
  net: pse-pd: fix kernel-doc function name for pse_control_find_by_id()
  wireguard: device: use exit_rtnl callback instead of manual rtnl_lock in pre_exit
  wireguard: allowedips: remove redundant space
  tools: ynl: add sample for wireguard
  wireguard: allowedips: Use kfree_rcu() instead of call_rcu()
  MAINTAINERS: Add netkit selftest files
  selftests/net: Add additional test coverage in nk_qlease
  selftests/net: Split netdevsim tests from HW tests in nk_qlease
  tools/ynl: Make YnlFamily closeable as a context manager
  net: airoha: Add missing PPE configurations in airoha_ppe_hw_init()
  net: airoha: Fix VIP configuration for AN7583 SoC
  net: caif: clear client service pointer on teardown
  net: strparser: fix skb_head leak in strp_abort_strp()
  net: usb: cdc-phonet: fix skb frags[] overflow in rx_complete()
  selftests/bpf: add test for xdp_master_redirect with bond not up
  net, bpf: fix null-ptr-deref in xdp_master_redirect() for down master
  net: airoha: Remove PCE_MC_EN_MASK bit in REG_FE_PCE_CFG configuration
  sctp: disable BH before calling udp_tunnel_xmit_skb()
  sctp: fix missing encap_port propagation for GSO fragments
  net: airoha: Rely on net_device pointer in ETS callbacks
  ...
 2026-04-14 18:36:10 -07:00
Linus Torvalds
f5ad410100 bpf-next-7.1 
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Merge tag 'bpf-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next

Pull bpf updates from Alexei Starovoitov:

 - Welcome new BPF maintainers: Kumar Kartikeya Dwivedi, Eduard
   Zingerman while Martin KaFai Lau reduced his load to Reviwer.

 - Lots of fixes everywhere from many first time contributors. Thank you
   All.

 - Diff stat is dominated by mechanical split of verifier.c into
   multiple components:

    - backtrack.c: backtracking logic and jump history
    - states.c:    state equivalence
    - cfg.c:       control flow graph, postorder, strongly connected
                   components
    - liveness.c:  register and stack liveness
    - fixups.c:    post-verification passes: instruction patching, dead
                   code removal, bpf_loop inlining, finalize fastcall

   8k line were moved. verifier.c still stands at 20k lines.

   Further refactoring is planned for the next release.

 - Replace dynamic stack liveness with static stack liveness based on
   data flow analysis.

   This improved the verification time by 2x for some programs and
   equally reduced memory consumption. New logic is in liveness.c and
   supported by constant folding in const_fold.c (Eduard Zingerman,
   Alexei Starovoitov)

 - Introduce BTF layout to ease addition of new BTF kinds (Alan Maguire)

 - Use kmalloc_nolock() universally in BPF local storage (Amery Hung)

 - Fix several bugs in linked registers delta tracking (Daniel Borkmann)

 - Improve verifier support of arena pointers (Emil Tsalapatis)

 - Improve verifier tracking of register bounds in min/max and tnum
   domains (Harishankar Vishwanathan, Paul Chaignon, Hao Sun)

 - Further extend support for implicit arguments in the verifier (Ihor
   Solodrai)

 - Add support for nop,nop5 instruction combo for USDT probes in libbpf
   (Jiri Olsa)

 - Support merging multiple module BTFs (Josef Bacik)

 - Extend applicability of bpf_kptr_xchg (Kaitao Cheng)

 - Retire rcu_trace_implies_rcu_gp() (Kumar Kartikeya Dwivedi)

 - Support variable offset context access for 'syscall' programs (Kumar
   Kartikeya Dwivedi)

 - Migrate bpf_task_work and dynptr to kmalloc_nolock() (Mykyta
   Yatsenko)

 - Fix UAF in in open-coded task_vma iterator (Puranjay Mohan)

* tag 'bpf-next-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next: (241 commits)
  selftests/bpf: cover short IPv4/IPv6 inputs with adjust_room
  bpf: reject short IPv4/IPv6 inputs in bpf_prog_test_run_skb
  selftests/bpf: Use memfd_create instead of shm_open in cgroup_iter_memcg
  selftests/bpf: Add test for cgroup storage OOB read
  bpf: Fix OOB in pcpu_init_value
  selftests/bpf: Fix reg_bounds to match new tnum-based refinement
  selftests/bpf: Add tests for non-arena/arena operations
  bpf: Allow instructions with arena source and non-arena dest registers
  bpftool: add missing fsession to the usage and docs of bpftool
  docs/bpf: add missing fsession attach type to docs
  bpf: add missing fsession to the verifier log
  bpf: Move BTF checking logic into check_btf.c
  bpf: Move backtracking logic to backtrack.c
  bpf: Move state equivalence logic to states.c
  bpf: Move check_cfg() into cfg.c
  bpf: Move compute_insn_live_regs() into liveness.c
  bpf: Move fixup/post-processing logic from verifier.c into fixups.c
  bpf: Simplify do_check_insn()
  bpf: Move checks for reserved fields out of the main pass
  bpf: Delete unused variable
  ...
 2026-04-14 18:04:04 -07:00
Linus Torvalds
e997ac58ad linux_kselftest-next-7.1-rc1 
Improvements and fixes kselftest, kselftest harness, frameworks
 and individual tests:
 
 -- cpu-hotplug: fix to check if cpu hotplug is supported to avoid
    test failures when cpu hotplug isn't supported.
 -- frace: fix to relevant comparisons and path checks in the helper so
    it  handles those patterns without spurious shell warnings.
 -- runner.sh: add ktrap support
 -- tracing: fix to make --logdir option work again
 -- tracing: fix to check awk supports non POSIX strtonum()
 -- mqueue: fix incorrectly named settings file to make sure the test
    used the correct timeout value
 -- kselftest:
    - fix to treat xpass as successful result
    - add ksft_reset_state()
 -- kselftest_harness:
    - validate kselftest exit codes are handled explicitly
    - add detection of invalid mixing of kselftest and harness functionality
    - add validation of intermixing of kselftest and harness functionality
 -- run_kselftest.sh:
    - remove unused $ROOT
    - resolve BASE_DIR with pwd -P to avoid dependency on realpath
      or readlink commands to generate a physical absolute path for
      BASE_DIR
    - allow choosing per-test log directory
    - preserve subtarget failures in all/install
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Merge tag 'linux_kselftest-next-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest updates from Shuah Khan:

 - cpu-hotplug: fix to check if cpu hotplug is supported to avoid
   test failures when cpu hotplug isn't supported.

 - frace: fix to relevant comparisons and path checks in the helper so
   it  handles those patterns without spurious shell warnings.

 - runner.sh: add ktrap support

 - tracing: fix to make --logdir option work again

 - tracing: fix to check awk supports non POSIX strtonum()

 - mqueue: fix incorrectly named settings file to make sure the test
   used the correct timeout value

 - kselftest:
    - fix to treat xpass as successful result
    - add ksft_reset_state()

 - kselftest_harness:
    - validate kselftest exit codes are handled explicitly
    - add detection of invalid mixing of kselftest and harness
      functionality
    - add validation of intermixing of kselftest and harness
      functionality

 - run_kselftest.sh:
    - remove unused $ROOT
    - resolve BASE_DIR with pwd -P to avoid dependency on realpath
      or readlink commands to generate a physical absolute path for
      BASE_DIR
    - allow choosing per-test log directory
    - preserve subtarget failures in all/install

* tag 'linux_kselftest-next-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  selftests/ftrace: Quote check_requires comparisons
  selftests: Preserve subtarget failures in all/install
  selftests/run_kselftest.sh: Allow choosing per-test log directory
  selftests/run_kselftest.sh: Resolve BASE_DIR with pwd -P
  selftests/run_kselftest.sh: Remove unused $ROOT
  selftests/cpu-hotplug: Fix check for cpu hotplug not supported
  selftests/mqueue: Fix incorrectly named file
  selftests: Use ktap helpers for runner.sh
  selftests: harness: Validate intermixing of kselftest and harness functionality
  selftests: harness: Detect illegal mixing of kselftest and harness functionality
  selftests: kselftest: Add ksft_reset_state()
  selftests: harness: Validate that explicit kselftest exitcodes are handled
  selftests: kselftest: Treat xpass as successful result
  selftests/tracing: Fix to check awk supports non POSIX strtonum()
  selftests/tracing: Fix to make --logdir option work again
 2026-04-14 17:46:12 -07:00
Linus Torvalds
6198c86a97 linux_kselftest-kunit-7.1-rc1 
Fixes kunit tool to
 -- terminate kernel under test on SIGINT when it catches SIGINT
    to make sure the TTY isn't messed up and terminate the running
    kernel.
 -- recommend --raw_output=all when KTAP header isn't found in the kernel
    output, it's useful to re-run the test with --raw_output=all to find
    out the reasons why the test didn't complete.
 -- skip stty when stdin is not a tty to avoid writing noise to stderr.
 -- show suites when user runs --list_suites option instead of entire
    list of tests to make the output user friendly and concise.
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Merge tag 'linux_kselftest-kunit-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kunit tool updates from Shuah Khan:

 - terminate kernel under test on SIGINT when it catches SIGINT to make
   sure the TTY isn't messed up and terminate the running kernel

 - recommend --raw_output=all when KTAP header isn't found in the kernel
   output, it's useful to re-run the test with --raw_output=all to find
   out the reasons why the test didn't complete.

 - skip stty when stdin is not a tty to avoid writing noise to stderr.

 - show suites when user runs --list_suites option instead of entire
   list of tests to make the output user friendly and concise.

* tag 'linux_kselftest-kunit-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest:
  kunit: tool: Terminate kernel under test on SIGINT
  kunit: tool: skip stty when stdin is not a tty
  kunit: tool: Recommend --raw_output=all if no KTAP found
  kunit: Add --list_suites to show suites
 2026-04-14 17:39:42 -07:00
Linus Torvalds
88b29f3f57 Modules changes for v7.1-rc1 
Kernel symbol flags:
 
   - Replace the separate *_gpl symbol sections (__ksymtab_gpl and
     __kcrctab_gpl) with a unified symbol table and a new
     __kflagstab section. This section stores symbol flags, such as
     the GPL-only flag, as an 8-bit bitset for each exported symbol.
     This is a cleanup that simplifies symbol lookup in the module
     loader by avoiding table fragmentation and will allow a cleaner
     way to add more flags later if needed.
 
 Module signature UAPI:
 
   - Move struct module_signature to the UAPI headers to allow reuse
     by tools outside the kernel proper, such as kmod and
     scripts/sign-file. This also renames a few constants for clarity
     and drops unused signature types as preparation for hash-based
     module integrity checking work that's in progress.
 
 Sysfs:
 
   - Add a /sys/module/<module>/import_ns sysfs attribute to show
     the symbol namespaces imported by loaded modules. This makes it
     easier to verify driver API access at runtime on systems that
     care about such things (e.g. Android).
 
 Cleanups and fixes:
 
   - Force sh_addr to 0 for all sections in module.lds. This prevents
     non-zero section addresses when linking modules with ld.bfd -r,
     which confused elfutils.
 
   - Fix a memory leak of charp module parameters on module unload
     when the kernel is configured with CONFIG_SYSFS=n.
 
   - Override the -EEXIST error code returned by module_init() to
     userspace. This prevents confusion with the errno reserved by
     the module loader to indicate that a module is already loaded.
 
   - Simplify the warning message and drop the stack dump on positive
     returns from module_init().
 
   - Drop unnecessary extern keywords from function declarations and
     synchronize parse_args() arguments with their implementation.
 
 Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
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Merge tag 'modules-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux

Pull module updates from Sami Tolvanen:
 "Kernel symbol flags:

   - Replace the separate *_gpl symbol sections (__ksymtab_gpl and
     __kcrctab_gpl) with a unified symbol table and a new __kflagstab
     section.

     This section stores symbol flags, such as the GPL-only flag, as an
     8-bit bitset for each exported symbol. This is a cleanup that
     simplifies symbol lookup in the module loader by avoiding table
     fragmentation and will allow a cleaner way to add more flags later
     if needed.

  Module signature UAPI:

   - Move struct module_signature to the UAPI headers to allow reuse by
     tools outside the kernel proper, such as kmod and
     scripts/sign-file.

     This also renames a few constants for clarity and drops unused
     signature types as preparation for hash-based module integrity
     checking work that's in progress.

  Sysfs:

   - Add a /sys/module/<module>/import_ns sysfs attribute to show the
     symbol namespaces imported by loaded modules.

     This makes it easier to verify driver API access at runtime on
     systems that care about such things (e.g. Android).

  Cleanups and fixes:

   - Force sh_addr to 0 for all sections in module.lds. This prevents
     non-zero section addresses when linking modules with 'ld.bfd -r',
     which confused elfutils.

   - Fix a memory leak of charp module parameters on module unload when
     the kernel is configured with CONFIG_SYSFS=n.

   - Override the -EEXIST error code returned by module_init() to
     userspace. This prevents confusion with the errno reserved by the
     module loader to indicate that a module is already loaded.

   - Simplify the warning message and drop the stack dump on positive
     returns from module_init().

   - Drop unnecessary extern keywords from function declarations and
     synchronize parse_args() arguments with their implementation"

* tag 'modules-7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/modules/linux: (23 commits)
  module: Simplify warning on positive returns from module_init()
  module: Override -EEXIST module return
  documentation: remove references to *_gpl sections
  module: remove *_gpl sections from vmlinux and modules
  module: deprecate usage of *_gpl sections in module loader
  module: use kflagstab instead of *_gpl sections
  module: populate kflagstab in modpost
  module: add kflagstab section to vmlinux and modules
  module: define ksym_flags enumeration to represent kernel symbol flags
  selftests/bpf: verify_pkcs7_sig: Use 'struct module_signature' from the UAPI headers
  sign-file: use 'struct module_signature' from the UAPI headers
  tools uapi headers: add linux/module_signature.h
  module: Move 'struct module_signature' to UAPI
  module: Give MODULE_SIG_STRING a more descriptive name
  module: Give 'enum pkey_id_type' a more specific name
  module: Drop unused signature types
  extract-cert: drop unused definition of PKEY_ID_PKCS7
  docs: symbol-namespaces: mention sysfs attribute
  module: expose imported namespaces via sysfs
  module: Remove extern keyword from param prototypes
  ...
 2026-04-14 17:16:38 -07:00
Linus Torvalds
ee60c510fb nolibc changes for 7.1 
Highlights:
 
 * Many new features and optimizations to printf().
 * Rename non-standard symbols to avoid collisions with application code.
 * Support for byteswap.h, endian.h, err.h and asprintf().
 * 64-bit dev_t.
 * Smaller cleanips and fixes to the code and build system.
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Merge tag 'nolibc-20260412-for-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/nolibc/linux-nolibc

Pull nolibc updates from Thomas Weißschuh:

 - Many new features and optimizations to printf()

 - Rename non-standard symbols to avoid collisions with application code

 - Support for byteswap.h, endian.h, err.h and asprintf()

 - 64-bit dev_t

 - Smaller cleanups and fixes to the code and build system

* tag 'nolibc-20260412-for-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/nolibc/linux-nolibc: (61 commits)
  selftests/nolibc: use gcc 15
  tools/nolibc: support UBSAN on gcc
  tools/nolibc: create __nolibc_no_sanitize_ubsan
  selftests/nolibc: don't skip tests for unimplemented syscalls anymore
  selftests/nolibc: explicitly handle ENOSYS from ptrace()
  tools/nolibc: add byteorder conversions
  tools/nolibc: add the _syscall() macro
  tools/nolibc: move the call to __sysret() into syscall()
  tools/nolibc: rename the internal macros used in syscall()
  selftests/nolibc: only use libgcc when really necessary
  selftests/nolibc: test the memory allocator
  tools/nolibc: check for overflow in calloc() without divisions
  tools/nolibc: add support for asprintf()
  tools/nolibc: use __builtin_offsetof()
  tools/nolibc: use makedev() in fstatat()
  tools/nolibc: handle all major and minor numbers in makedev() and friends
  tools/nolibc: make dev_t 64 bits wide
  tools/nolibc: move the logic of makedev() and friends into functions
  selftests/nolibc: add a test for stat().st_rdev
  selftests/nolibc: add some tests for makedev() and friends
  ...
 2026-04-14 17:13:09 -07:00
Linus Torvalds
3203a08c12 powerpc updates for 7.1 
- powerpc support for huge pfnmaps
 
  - Cleanups to use masked user access
 
  - Rework pnv_ioda_pick_m64_pe() to use better bitmap API
 
  - Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC
 
  - Backup region offset update to eflcorehdr
 
  - Fixes for wii/ps3 platform
 
  - Implement JIT support for private stack in powerpc
 
  - Implement JIT support for fsession in powerpc64 trampoline
 
  - Add support for instruction array and indirect jump in powerpc
 
  - Misc selftest fixes and cleanups
 
 Thanks to:
 Abhishek Dubey, Aditya Gupta, Alex Williamson, Amit Machhiwal, Andrew
 Donnellan, Bartosz Golaszewski, Cédric Le Goater, Chen Ni, Christophe Leroy (CS
 GROUP), Hari Bathini, J. Neuschäfer, Mukesh Kumar Chaurasiya (IBM), Nam Cao,
 Nilay Shroff, Pavithra Prakash, Randy Dunlap, Ritesh Harjani (IBM), Shrikanth
 Hegde, Sourabh Jain, Vaibhav Jain, Venkat Rao Bagalkote, Yury Norov (NVIDIA)
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Merge tag 'powerpc-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Madhavan Srinivasan:

 - powerpc support for huge pfnmaps

 - Cleanups to use masked user access

 - Rework pnv_ioda_pick_m64_pe() to use better bitmap API

 - Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC

 - Backup region offset update to eflcorehdr

 - Fixes for wii/ps3 platform

 - Implement JIT support for private stack in powerpc

 - Implement JIT support for fsession in powerpc64 trampoline

 - Add support for instruction array and indirect jump in powerpc

 - Misc selftest fixes and cleanups

Thanks to Abhishek Dubey, Aditya Gupta, Alex Williamson, Amit Machhiwal,
Andrew Donnellan, Bartosz Golaszewski, Cédric Le Goater, Chen Ni,
Christophe Leroy (CS GROUP), Hari Bathini, J. Neuschäfer, Mukesh Kumar
Chaurasiya (IBM), Nam Cao, Nilay Shroff, Pavithra Prakash, Randy Dunlap,
Ritesh Harjani (IBM), Shrikanth Hegde, Sourabh Jain, Vaibhav Jain,
Venkat Rao Bagalkote, and Yury Norov (NVIDIA)

* tag 'powerpc-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (47 commits)
  mailmap: Add entry for Andrew Donnellan
  powerpc32/bpf: fix loading fsession func metadata using PPC_LI32
  selftest/bpf: Enable gotox tests for powerpc64
  powerpc64/bpf: Add support for indirect jump
  selftest/bpf: Enable instruction array test for powerpc
  powerpc/bpf: Add support for instruction array
  powerpc32/bpf: Add fsession support
  powerpc64/bpf: Implement fsession support
  selftests/bpf: Enable private stack tests for powerpc64
  powerpc64/bpf: Implement JIT support for private stack
  powerpc: pci-ioda: Optimize pnv_ioda_pick_m64_pe()
  powerpc: pci-ioda: use bitmap_alloc() in pnv_ioda_pick_m64_pe()
  powerpc/net: Inline checksum wrappers and convert to scoped user access
  powerpc/sstep: Convert to scoped user access
  powerpc/align: Convert emulate_spe() to scoped user access
  powerpc/ptrace: Convert gpr32_set_common_user() to scoped user access
  powerpc/futex: Use masked user access
  powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC
  cpuidle: powerpc: avoid double clear when breaking snooze
  powerpc/ps3: spu.c: fix enum and Return kernel-doc warnings
  ...
 2026-04-14 17:10:15 -07:00
Linus Torvalds
e6b162a63f m68knommu: updates and fixes for v7.1 
. fix task info flags handling for 68000 nommu
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Merge tag 'm68knommu-for-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu

Pull m68knommu update from Greg Ungerer:

 - fix task info flags handling for 68000 nommu

* tag 'm68knommu-for-v7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/gerg/m68knommu:
  m68k: Fix task info flags handling for 68000
 2026-04-14 17:07:45 -07:00
Linus Torvalds
c43267e679 arm64 updates for 7.1: 
Core features:
 
  - Add support for FEAT_LSUI, allowing futex atomic operations without
    toggling Privileged Access Never (PAN)
 
  - Further refactor the arm64 exception handling code towards the
    generic entry infrastructure
 
  - Optimise __READ_ONCE() with CONFIG_LTO=y and allow alias analysis
    through it
 
 Memory management:
 
  - Refactor the arm64 TLB invalidation API and implementation for better
    control over barrier placement and level-hinted invalidation
 
  - Enable batched TLB flushes during memory hot-unplug
 
  - Fix rodata=full block mapping support for realm guests (when
    BBML2_NOABORT is available)
 
 Perf and PMU:
 
  - Add support for a whole bunch of system PMUs featured in NVIDIA's
    Tegra410 SoC (cspmu extensions for the fabric and PCIe, new drivers
    for CPU/C2C memory latency PMUs)
 
  - Clean up iomem resource handling in the Arm CMN driver
 
  - Fix signedness handling of AA64DFR0.{PMUVer,PerfMon}
 
 MPAM (Memory Partitioning And Monitoring):
 
  - Add architecture context-switch and hiding of the feature from KVM
 
  - Add interface to allow MPAM to be exposed to user-space using resctrl
 
  - Add errata workaround for some existing platforms
 
  - Add documentation for using MPAM and what shape of platforms can use
    resctrl
 
 Miscellaneous:
 
  - Check DAIF (and PMR, where relevant) at task-switch time
 
  - Skip TFSR_EL1 checks and barriers in synchronous MTE tag check mode
    (only relevant to asynchronous or asymmetric tag check modes)
 
  - Remove a duplicate allocation in the kexec code
 
  - Remove redundant save/restore of SCS SP on entry to/from EL0
 
  - Generate the KERNEL_HWCAP_ definitions from the arm64 hwcap
    descriptions
 
  - Add kselftest coverage for cmpbr_sigill()
 
  - Update sysreg definitions
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Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 updates from Catalin Marinas:
 "The biggest changes are MPAM enablement in drivers/resctrl and new PMU
  support under drivers/perf.

  On the core side, FEAT_LSUI lets futex atomic operations with EL0
  permissions, avoiding PAN toggling.

  The rest is mostly TLB invalidation refactoring, further generic entry
  work, sysreg updates and a few fixes.

  Core features:

   - Add support for FEAT_LSUI, allowing futex atomic operations without
     toggling Privileged Access Never (PAN)

   - Further refactor the arm64 exception handling code towards the
     generic entry infrastructure

   - Optimise __READ_ONCE() with CONFIG_LTO=y and allow alias analysis
     through it

  Memory management:

   - Refactor the arm64 TLB invalidation API and implementation for
     better control over barrier placement and level-hinted invalidation

   - Enable batched TLB flushes during memory hot-unplug

   - Fix rodata=full block mapping support for realm guests (when
     BBML2_NOABORT is available)

  Perf and PMU:

   - Add support for a whole bunch of system PMUs featured in NVIDIA's
     Tegra410 SoC (cspmu extensions for the fabric and PCIe, new drivers
     for CPU/C2C memory latency PMUs)

   - Clean up iomem resource handling in the Arm CMN driver

   - Fix signedness handling of AA64DFR0.{PMUVer,PerfMon}

  MPAM (Memory Partitioning And Monitoring):

   - Add architecture context-switch and hiding of the feature from KVM

   - Add interface to allow MPAM to be exposed to user-space using
     resctrl

   - Add errata workaround for some existing platforms

   - Add documentation for using MPAM and what shape of platforms can
     use resctrl

  Miscellaneous:

   - Check DAIF (and PMR, where relevant) at task-switch time

   - Skip TFSR_EL1 checks and barriers in synchronous MTE tag check mode
     (only relevant to asynchronous or asymmetric tag check modes)

   - Remove a duplicate allocation in the kexec code

   - Remove redundant save/restore of SCS SP on entry to/from EL0

   - Generate the KERNEL_HWCAP_ definitions from the arm64 hwcap
     descriptions

   - Add kselftest coverage for cmpbr_sigill()

   - Update sysreg definitions"

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (109 commits)
  arm64: rsi: use linear-map alias for realm config buffer
  arm64: Kconfig: fix duplicate word in CMDLINE help text
  arm64: mte: Skip TFSR_EL1 checks and barriers in synchronous tag check mode
  arm64/sysreg: Update ID_AA64SMFR0_EL1 description to DDI0601 2025-12
  arm64/sysreg: Update ID_AA64ZFR0_EL1 description to DDI0601 2025-12
  arm64/sysreg: Update ID_AA64FPFR0_EL1 description to DDI0601 2025-12
  arm64/sysreg: Update ID_AA64ISAR2_EL1 description to DDI0601 2025-12
  arm64/sysreg: Update ID_AA64ISAR0_EL1 description to DDI0601 2025-12
  arm64/hwcap: Generate the KERNEL_HWCAP_ definitions for the hwcaps
  arm64: kexec: Remove duplicate allocation for trans_pgd
  ACPI: AGDI: fix missing newline in error message
  arm64: Check DAIF (and PMR) at task-switch time
  arm64: entry: Use split preemption logic
  arm64: entry: Use irqentry_{enter_from,exit_to}_kernel_mode()
  arm64: entry: Consistently prefix arm64-specific wrappers
  arm64: entry: Don't preempt with SError or Debug masked
  entry: Split preemption from irqentry_exit_to_kernel_mode()
  entry: Split kernel mode logic from irqentry_{enter,exit}()
  entry: Move irqentry_enter() prototype later
  entry: Remove local_irq_{enable,disable}_exit_to_user()
  ...
 2026-04-14 16:48:56 -07:00
Linus Torvalds
508fed6795 - Add new AMD MCA bank names and types to the MCA code, preceded by a clean 
up of the relevant places to have them more developer-friendly (read: sort
   them alphanumerically and clean up comments) such that adding new banks is
   easy
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Merge tag 'ras_core_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull RAS updates from Borislav Petkov:

 - Add new AMD MCA bank names and types to the MCA code, preceded by a
   clean up of the relevant places to have them more developer-friendly
   (read: sort them alphanumerically and clean up comments) such that
   adding new banks is easy

* tag 'ras_core_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mce, EDAC/mce_amd: Add new SMCA bank types
  x86/mce, EDAC/mce_amd: Update CS bank type naming
  x86/mce, EDAC/mce_amd: Reorder SMCA bank type enums
 2026-04-14 15:32:39 -07:00
Linus Torvalds
1834703b84 - amd64_edac: Add support for AMD Zen 3 (family 19h, models 40h–4fh) 
- i10nm: Add GNR error information decoder support as an alternative to the
   firmware decoder
 
 — versalnet: Restructure the init/teardown logic for correct and more readable
   error handling. Also, fix two memory leaks and a resource leak
 
 — Convert several internal structs to use bounded flex arrays, enabling the
   kernel's runtime checker to catch out-of-bounds memory accesses
 
 - Mark various sysfs attribute tables read-only, preventing accidental
   modification at runtime
 
 - The usual fixes and cleanups across the subsystem
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Merge tag 'edac_updates_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras

Pull EDAC updates from Borislav Petkov:

 - amd64_edac: Add support for AMD Zen 3 (family 19h, models 40h–4fh)

 - i10nm: Add GNR error information decoder support as an alternative to
   the firmware decoder

 - versalnet: Restructure the init/teardown logic for correct and more
   readable error handling. Also, fix two memory leaks and a resource
   leak

 - Convert several internal structs to use bounded flex arrays, enabling
   the kernel's runtime checker to catch out-of-bounds memory accesses

 - Mark various sysfs attribute tables read-only, preventing accidental
   modification at runtime

 - The usual fixes and cleanups across the subsystem

* tag 'edac_updates_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras:
  EDAC/mc: Use kzalloc_flex()
  EDAC/ie31200: Make rpl_s_cfg static
  EDAC/i10nm: Fix spelling mistake "readd" -> "read"
  EDAC/versalnet: Fix device_node leak in mc_probe()
  EDAC/versalnet: Fix memory leak in remove and probe error paths
  EDAC/amd64: Add support for family 19h, models 40h-4fh
  EDAC/i10nm: Add driver decoder for Granite Rapids server
  EDAC/sb: Use kzalloc_flex()
  EDAC/i7core: Use kzalloc_flex()
  EDAC/mpc85xx: Constify device sysfs attributes
  EDAC/device: Allow addition of const sysfs attributes
  EDAC/pci_sysfs: Constify instance sysfs attributes
  EDAC/device: Constify info sysfs attributes
  EDAC/device: Drop unnecessary and dangerous casts of attributes
  EDAC/device: Drop unused macro to_edacdev_attr()
  EDAC/altera: Drop unused field eccmgr_sysfs_attr
  EDAC/versalnet: Refactor memory controller initialization and cleanup
 2026-04-14 15:29:55 -07:00
Linus Torvalds
60b8d4d492 - Change the SEV host code handling of when SNP gets enabled in order to allow 
the machine to claim SNP-related resources only when SNP guests are really
   going to be launched. The user requests this by loading the ccp module and
   thus it controls when SNP initialization is done
 
   So export an API which module code can call and do the necessary SNP setup
   only when really needed
 
 - Drop an unnecessary write-back and invalidate operation that was being
   performed too early, since the ccp driver already issues its own at the
   correct point in the initialization sequence
 
 — Drop the hotplug callbacks for enabling SNP on newly onlined CPUs, which
   were both architecturally unsound (the firmware rejects initialization if any
   CPU lacks the required configuration) and buggy (the MFDM SYSCFG MSR bit was
   not being set)
 
 - Code refactoring and cleanups to accomplish the above
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Merge tag 'x86_sev_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 SEV updates from Borislav Petkov:

 - Change the SEV host code handling of when SNP gets enabled in order
   to allow the machine to claim SNP-related resources only when SNP
   guests are really going to be launched. The user requests this by
   loading the ccp module and thus it controls when SNP initialization
   is done

   So export an API which module code can call and do the necessary SNP
   setup only when really needed

 - Drop an unnecessary write-back and invalidate operation that was
   being performed too early, since the ccp driver already issues its
   own at the correct point in the initialization sequence

 - Drop the hotplug callbacks for enabling SNP on newly onlined CPUs,
   which were both architecturally unsound (the firmware rejects
   initialization if any CPU lacks the required configuration) and buggy
   (the MFDM SYSCFG MSR bit was not being set)

 - Code refactoring and cleanups to accomplish the above

* tag 'x86_sev_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  crypto/ccp: Update HV_FIXED page states to allow freeing of memory
  crypto/ccp: Implement SNP x86 shutdown
  x86/sev, crypto/ccp: Move HSAVE_PA setup to arch/x86/
  x86/sev, crypto/ccp: Move SNP init to ccp driver
  x86/sev: Create snp_shutdown()
  x86/sev: Create snp_prepare()
  x86/sev: Create a function to clear/zero the RMP
  x86/sev: Rename SNP_FEATURES_PRESENT to SNP_FEATURES_IMPL
  x86/virt/sev: Keep the RMP table bookkeeping area mapped
  x86/virt/sev: Drop WBINVD before setting MSR_AMD64_SYSCFG_SNP_EN
  x86/virt/sev: Drop support for SNP hotplug
 2026-04-14 15:20:54 -07:00
Linus Torvalds
970216e023 — Reference the tip tree maintainer handbook directly from the relevant 
MAINTAINERS file entries (covering timers, IRQ, locking, scheduling, perf,
   x86, and others) so that contributors and tooling can know where to
   look
 
 — Enable interrupt remapping in defconfig, which is an architectural
   requirement for x2APIC to function correctly on bare metal.  Without it,
   x2APIC was effectively enabled but non-functional.
 
 — Ensure that drivers which register custom restart handlers (such as those
   needed for SoC-based x86 devices like Intel Lightning Mountain) are actually
   invoked during reboot, bringing x86 in line with how other architectures
   handle this.
 
 - Cleanups
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Merge tag 'x86_misc_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull misc x86 updates from Borislav Petkov:

 - Reference the tip tree maintainer handbook directly from the relevant
   MAINTAINERS file entries (covering timers, IRQ, locking, scheduling,
   perf, x86, and others) so that contributors and tooling can know
   where to look

 - Enable interrupt remapping in defconfig, which is an architectural
   requirement for x2APIC to function correctly on bare metal. Without
   it, x2APIC was effectively enabled but non-functional.

 - Ensure that drivers which register custom restart handlers (such as
   those needed for SoC-based x86 devices like Intel Lightning Mountain)
   are actually invoked during reboot, bringing x86 in line with how
   other architectures handle this.

 - Cleanups

* tag 'x86_misc_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  MAINTAINERS: Add references to tip tree handbook
  x86/64/defconfig: Add CONFIG_IRQ_REMAP
  x86/reboot: Execute the kernel restart handler upon machine restart
  x86/mtrr: Use kstrtoul() in parse_mtrr_spare_reg()
 2026-04-14 15:15:08 -07:00
Linus Torvalds
cd4cdc53cc - The kernel carries a table of Intel CPUs family,model,stepping,...,etc 
tuples which say what is the latest microcode for that particular CPU. Some
   CPU variants differ only by the platform ID which determines what microcode
   needs to be loaded on them.
 
   Carve out the platform ID handling from the microcode loader and make it
   available in a more generic place so that the old microcode
   verification machinery can use it
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Merge tag 'x86_microcode_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 microcode loading updates from Borislav Petkov:
 "The kernel carries a table of Intel CPUs family, model, stepping, etc
  tuples which say what is the latest microcode for that particular CPU.

  Some CPU variants differ only by the platform ID which determines what
  microcode needs to be loaded on them.

  Carve out the platform ID handling from the microcode loader and make it
  available in a more generic place so that the old microcode
  verification machinery can use it"

* tag 'x86_microcode_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/microcode: Add platform mask to Intel microcode "old" list
  x86/cpu: Add platform ID to CPU matching structure
  x86/cpu: Add platform ID to CPU info structure
  x86/microcode: Refactor platform ID enumeration into a helper
 2026-04-14 14:57:29 -07:00
Linus Torvalds
e9635f2a73 - We made the FRED support an opt-in initially out of fear of it breaking 
machines left and right in the case of a hw bug in the first generation of
   machines supporting it. Now that that the FRED code has seen a lot of
   hammering, flip the logic to be opt-out as is the usual case with new hw
   features
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Merge tag 'x86_fred_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 FRED updates from Borislav Petkov:
 "We made the FRED support an opt-in initially out of fear of it
  breaking machines left and right in the case of a hw bug in the first
  generation of machines supporting it.

  Now that that the FRED code has seen a lot of hammering, flip the
  logic to be opt-out as is the usual case with new hw features"

* tag 'x86_fred_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fred: Remove kernel log message when initializing exceptions
  x86/fred: Enable FRED by default
 2026-04-14 14:50:51 -07:00
Linus Torvalds
fabd5a8d24 — Add return value descriptions to several internal functions, addressing 
kernel-doc complaints
 
 — Add the x86 maintainer mailing list to the resctrl section so they are
   automatically included in patch submissions, and reference the applicable
   contribution rules document
 
 — Allow users to apply a single Capacity Bitmask to all cache domains at once
   using '*' as a shorthand, instead of having to specify each domain
   individually. This is particularly user-friendly on high core-count systems
   with many cache clusters
 
 - When a user provides a non-existent domain ID while configuring cache
   allocation, ensure the failure reason is properly reported to the user
   rather than silently returning an error with a misleading "ok" status
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Merge tag 'x86_cache_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 resource control updates from Borislav Petkov:

 - Add return value descriptions to several internal functions,
   addressing kernel-doc complaints

 - Add the x86 maintainer mailing list to the resctrl section so they
   are automatically included in patch submissions, and reference the
   applicable contribution rules document

 - Allow users to apply a single Capacity Bitmask to all cache domains
   at once using '*' as a shorthand, instead of having to specify each
   domain individually. This is particularly user-friendly on high
   core-count systems with many cache clusters

 - When a user provides a non-existent domain ID while configuring cache
   allocation, ensure the failure reason is properly reported to the
   user rather than silently returning an error with a misleading "ok"
   status

* tag 'x86_cache_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  fs/resctrl: Add missing return value descriptions
  MAINTAINERS: Update resctrl entry
  fs/resctrl: Add "*" shorthand to set io_alloc CBM for all domains
  fs/resctrl: Report invalid domain ID when parsing io_alloc_cbm
 2026-04-14 14:46:37 -07:00
Linus Torvalds
883af1f8e8 - Print TDX module version during boot 
- Make TDX attribute naming consistent
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Merge tag 'x86_tdx_for_7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 TDX updates from Dave Hansen:
 "The only real thing of note here is printing the TDX module version.

  This is a little silly on its own, but the upcoming TDX module update
  code needs the same TDX module call. This shrinks that set a wee bit.

  There's also few minor macro cleanups and a tweak to the GetQuote ABI
  to make it easier for userspace to detect zero-length (failed) quotes"

* tag 'x86_tdx_for_7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  virt: tdx-guest: Return error for GetQuote failures
  KVM/TDX: Rename KVM_SUPPORTED_TD_ATTRS to KVM_SUPPORTED_TDX_TD_ATTRS
  x86/tdx: Rename TDX_ATTR_* to TDX_TD_ATTR_*
  KVM/TDX: Remove redundant definitions of TDX_TD_ATTR_*
  x86/tdx: Fix the typo in TDX_ATTR_MIGRTABLE
  x86/virt/tdx: Print TDX module version during init
  x86/virt/tdx: Retrieve TDX module version
 2026-04-14 14:42:55 -07:00
Linus Torvalds
51efd08647 - Convert x86 code to use generic "pagetable" APIs and ptdescs 
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Merge tag 'x86_mm_for_7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 mm updates from Dave Hansen:

 - Convert x86 code to use generic "pagetable" APIs and ptdescs

   This aligns some the set_memory*() code better with the new page
   table APIs, especially using ptdescs as opposed to 'struct page'
   directly.

* tag 'x86_mm_for_7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm/pat: Convert split_large_page() to use ptdescs
  x86/mm/pat: Convert populate_pgd() to use page table apis
  x86/mm/pat: Convert pmd code to use page table apis
  x86/mm/pat: Convert pte code to use page table apis
 2026-04-14 14:33:56 -07:00
Linus Torvalds
9f2bb6c7b3 - Complete LASS enabling: deal with vsyscall and EFI 
- Clean up CPUID usage in newer Intel audio driver
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Merge tag 'x86_cpu_for_7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 cpu updates from Dave Hansen:

 - Complete LASS enabling: deal with vsyscall and EFI

   The existing Linear Address Space Separation (LASS) support punted
   on support for common EFI and vsyscall configs. Complete the
   implementation by supporting EFI and vsyscall=xonly.

 - Clean up CPUID usage in newer Intel "avs" audio driver and update the
   x86-cpuid-db file

* tag 'x86_cpu_for_7.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  tools/x86/kcpuid: Update bitfields to x86-cpuid-db v3.0
  ASoC: Intel: avs: Include CPUID header at file scope
  ASoC: Intel: avs: Check maximum valid CPUID leaf
  x86/cpu: Remove LASS restriction on vsyscall emulation
  x86/vsyscall: Disable LASS if vsyscall mode is set to EMULATE
  x86/vsyscall: Restore vsyscall=xonly mode under LASS
  x86/traps: Consolidate user fixups in the #GP handler
  x86/vsyscall: Reorganize the page fault emulation code
  x86/cpu: Remove LASS restriction on EFI
  x86/efi: Disable LASS while executing runtime services
  x86/cpu: Defer LASS enabling until userspace comes up
 2026-04-14 14:24:45 -07:00
Linus Torvalds
49b30f3e9c x86/vdso changes for v7.1, by Thomas Weißschuh: 
- Clean up remnants of VDSO32_NOTE_MASK
  - Drop pointless #ifdeffery in vvar_vclock_fault()
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-vdso-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 vdso updates from Ingo Molnar:
 "vdso cleanups by Thomas Weißschuh:

   - Clean up remnants of VDSO32_NOTE_MASK

   - Drop pointless #ifdeffery in vvar_vclock_fault()"

* tag 'x86-vdso-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/vdso: Drop pointless #ifdeffery in vvar_vclock_fault()
  x86/vdso: Clean up remnants of VDSO32_NOTE_MASK
 2026-04-14 14:16:27 -07:00
Linus Torvalds
0972ba5605 x86/platform changes for v7.1: 
- Remove M486/M486SX/ELAN support, first minimal step (Ingo Molnar)
 
  - Print AGESA string from DMI additional information entry
    (Yazen Ghannam, Mario Limonciello)
 
  - Improve and fix the DMI code (Mario Limonciello):
     - Correct an indexing error in <linux/dmi.h>
     - Adjust dmi_decode() to use enums <linux/dmi.h>
     - Add pr_fmt() for dmi_scan.c to fix & standardize
       the log prefixes
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-platform-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 platform updates from Ingo Molnar:

 - Remove M486/M486SX/ELAN support, first minimal step (Ingo Molnar)

 - Print AGESA string from DMI additional information entry (Yazen
   Ghannam, Mario Limonciello)

 - Improve and fix the DMI code (Mario Limonciello):
     - Correct an indexing error in <linux/dmi.h>
     - Adjust dmi_decode() to use enums <linux/dmi.h>
     - Add pr_fmt() for dmi_scan.c to fix & standardize the log prefixes

* tag 'x86-platform-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/CPU/AMD: Print AGESA string from DMI additional information entry
  firmware: dmi: Add pr_fmt() for dmi_scan.c
  firmware: dmi: Adjust dmi_decode() to use enums
  firmware: dmi: Correct an indexing error in dmi.h
  x86/cpu: Remove M486/M486SX/ELAN support
 2026-04-14 14:10:44 -07:00
Linus Torvalds
ac633ba77c Miscellaneous x86 cleanups for v7.1: 
- Consolidate AMD and Hygon cases in parse_topology() (Wei Wang)
  - asm constraints cleanups in __iowrite32_copy() (Uros Bizjak)
  - Drop AMD Extended Interrupt LVT macros (Naveen N Rao)
  - Don't use REALLY_SLOW_IO for delays (Juergen Gross)
  - paravirt cleanups (Juergen Gross)
  - FPU code cleanups (Borislav Petkov)
  - split-lock handling code cleanups (Borislav Petkov, Ronan Pigott)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-cleanups-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 cleanups from Ingo Molnar:

 - Consolidate AMD and Hygon cases in parse_topology() (Wei Wang)

 - asm constraints cleanups in __iowrite32_copy() (Uros Bizjak)

 - Drop AMD Extended Interrupt LVT macros (Naveen N Rao)

 - Don't use REALLY_SLOW_IO for delays (Juergen Gross)

 - paravirt cleanups (Juergen Gross)

 - FPU code cleanups (Borislav Petkov)

 - split-lock handling code cleanups (Borislav Petkov, Ronan Pigott)

* tag 'x86-cleanups-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/fpu: Correct the comment explaining what xfeatures_in_use() does
  x86/split_lock: Don't warn about unknown split_lock_detect parameter
  x86/fpu: Correct misspelled xfeaures_to_write local var
  x86/apic: Drop AMD Extended Interrupt LVT macros
  x86/cpu/topology: Consolidate AMD and Hygon cases in parse_topology()
  block/floppy: Don't use REALLY_SLOW_IO for delays
  x86/paravirt: Replace io_delay() hook with a bool
  x86/irqflags: Preemptively move include paravirt.h directive where it belongs
  x86/split_lock: Restructure the unwieldy switch-case in sld_state_show()
  x86/local: Remove trailing semicolon from _ASM_XADD in local_add_return()
  x86/asm: Use inout "+" asm onstraint modifiers in __iowrite32_copy()
 2026-04-14 14:03:27 -07:00
Linus Torvalds
2ee08a8963 x86/asm updates for v7.1, by Uros Bizjak: 
- Remove unnecessary "memory" clobbers from FS/GS base (read-) accessors
  - Remove unnecessary "memory" clobber from savesegment()
  - Use ASM_INPUT_RM in __loadsegment_fs()
  - Implement loadsegment()/savesegment() macros with static inline helpers
  - Use savesegment() for segment register reads in ELF core dump
  - Use savesegment() in __show_regs() instead of inline asm
  - Use correct type for 'gs' variable in __show_regs() to avoid zero-extension
  - Clean up 'sel' variable usage in do_set_thread_area()
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'x86-asm-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 asm from Ingo Molnar:
 "x86 asm cleanups by Uros Bizjak:

   - Remove unnecessary memory clobbers from FS/GS base (read-)
     accessors and savesegment()

   - Use ASM_INPUT_RM in __loadsegment_fs() to work around clang code
     generation problems

   - Implement loadsegment()/savesegment() macros with static inline
     helpers

   - Use savesegment() for segment register reads in ELF core dump and
     __show_regs()

   - Use correct type for 'gs' variable in __show_regs() to avoid
     zero-extension

   - Clean up 'sel' variable usage in do_set_thread_area()"

* tag 'x86-asm-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/tls: Clean up 'sel' variable usage in do_set_thread_area()
  x86/process/32: Use correct type for 'gs' variable in __show_regs() to avoid zero-extension
  x86/process/64: Use savesegment() in __show_regs() instead of inline asm
  x86/elf: Use savesegment() for segment register reads in ELF core dump
  x86/asm/segment: Implement loadsegment()/savesegment() macros with static inline helpers
  x86/asm/segment: Use ASM_INPUT_RM in __loadsegment_fs()
  x86/asm/segment: Remove unnecessary "memory" clobber from savesegment()
  x86/asm/fsgsbase: Remove unnecessary "memory" clobbers from FS/GS base (read-) accessors
 2026-04-14 13:54:17 -07:00
Linus Torvalds
1c3b68f0d5 Scheduler changes for v7.1: 
Fair scheduling updates:
 
  - Skip SCHED_IDLE rq for SCHED_IDLE tasks (Christian Loehle)
  - Remove superfluous rcu_read_lock() in the wakeup path (K Prateek Nayak)
  - Simplify the entry condition for update_idle_cpu_scan() (K Prateek Nayak)
  - Simplify SIS_UTIL handling in select_idle_cpu() (K Prateek Nayak)
  - Avoid overflow in enqueue_entity() (K Prateek Nayak)
  - Update overutilized detection (Vincent Guittot)
  - Prevent negative lag increase during delayed dequeue (Vincent Guittot)
  - Clear buddies for preempt_short (Vincent Guittot)
  - Implement more complex proportional newidle balance (Peter Zijlstra)
  - Increase weight bits for avg_vruntime (Peter Zijlstra)
  - Use full weight to __calc_delta() (Peter Zijlstra)
 
 RT and DL scheduling updates:
 
  - Fix incorrect schedstats for rt and dl thread (Dengjun Su)
  - Skip group schedulable check with rt_group_sched=0 (Michal Koutný)
  - Move group schedulability check to sched_rt_global_validate()
    (Michal Koutný)
  - Add reporting of runtime left & abs deadline to sched_getattr()
    for DEADLINE tasks (Tommaso Cucinotta)
 
 Scheduling topology updates by K Prateek Nayak:
 
  - Compute sd_weight considering cpuset partitions
  - Extract "imb_numa_nr" calculation into a separate helper
  - Allocate per-CPU sched_domain_shared in s_data
  - Switch to assigning "sd->shared" from s_data
  - Remove sched_domain_shared allocation with sd_data
 
 Energy-aware scheduling updates:
 
  - Filter false overloaded_group case for EAS (Vincent Guittot)
  - PM: EM: Switch to rcu_dereference_all() in wakeup path
    (Dietmar Eggemann)
 
 Infrastructure updates:
 
  - Replace use of system_unbound_wq with system_dfl_wq (Marco Crivellari)
 
 Proxy scheduling updates by John Stultz:
 
  - Make class_schedulers avoid pushing current, and get rid of proxy_tag_curr()
  - Minimise repeated sched_proxy_exec() checking
  - Fix potentially missing balancing with Proxy Exec
  - Fix and improve task::blocked_on et al handling
  - Add assert_balance_callbacks_empty() helper
  - Add logic to zap balancing callbacks if we pick again
  - Move attach_one_task() and attach_task() helpers to sched.h
  - Handle blocked-waiter migration (and return migration)
  - Add K Prateek Nayak to scheduler reviewers for proxy execution
 
 Misc cleanups and fixes by John Stultz, Joseph Salisbury,
 Peter Zijlstra, K Prateek Nayak, Michal Koutný, Randy Dunlap,
 Shrikanth Hegde, Vincent Guittot, Zhan Xusheng, Xie Yuanbin
 and Vincent Guittot.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'sched-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull scheduler updates from Ingo Molnar:
 "Fair scheduling updates:
   - Skip SCHED_IDLE rq for SCHED_IDLE tasks (Christian Loehle)
   - Remove superfluous rcu_read_lock() in the wakeup path (K Prateek Nayak)
   - Simplify the entry condition for update_idle_cpu_scan() (K Prateek Nayak)
   - Simplify SIS_UTIL handling in select_idle_cpu() (K Prateek Nayak)
   - Avoid overflow in enqueue_entity() (K Prateek Nayak)
   - Update overutilized detection (Vincent Guittot)
   - Prevent negative lag increase during delayed dequeue (Vincent Guittot)
   - Clear buddies for preempt_short (Vincent Guittot)
   - Implement more complex proportional newidle balance (Peter Zijlstra)
   - Increase weight bits for avg_vruntime (Peter Zijlstra)
   - Use full weight to __calc_delta() (Peter Zijlstra)

  RT and DL scheduling updates:
   - Fix incorrect schedstats for rt and dl thread (Dengjun Su)
   - Skip group schedulable check with rt_group_sched=0 (Michal Koutný)
   - Move group schedulability check to sched_rt_global_validate()
     (Michal Koutný)
   - Add reporting of runtime left & abs deadline to sched_getattr()
     for DEADLINE tasks (Tommaso Cucinotta)

  Scheduling topology updates by K Prateek Nayak:
   - Compute sd_weight considering cpuset partitions
   - Extract "imb_numa_nr" calculation into a separate helper
   - Allocate per-CPU sched_domain_shared in s_data
   - Switch to assigning "sd->shared" from s_data
   - Remove sched_domain_shared allocation with sd_data

  Energy-aware scheduling updates:
   - Filter false overloaded_group case for EAS (Vincent Guittot)
   - PM: EM: Switch to rcu_dereference_all() in wakeup path
     (Dietmar Eggemann)

  Infrastructure updates:
   - Replace use of system_unbound_wq with system_dfl_wq (Marco Crivellari)

  Proxy scheduling updates by John Stultz:
   - Make class_schedulers avoid pushing current, and get rid of proxy_tag_curr()
   - Minimise repeated sched_proxy_exec() checking
   - Fix potentially missing balancing with Proxy Exec
   - Fix and improve task::blocked_on et al handling
   - Add assert_balance_callbacks_empty() helper
   - Add logic to zap balancing callbacks if we pick again
   - Move attach_one_task() and attach_task() helpers to sched.h
   - Handle blocked-waiter migration (and return migration)
   - Add K Prateek Nayak to scheduler reviewers for proxy execution

  Misc cleanups and fixes by John Stultz, Joseph Salisbury, Peter
  Zijlstra, K Prateek Nayak, Michal Koutný, Randy Dunlap, Shrikanth
  Hegde, Vincent Guittot, Zhan Xusheng, Xie Yuanbin and Vincent Guittot"

* tag 'sched-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (46 commits)
  sched/eevdf: Clear buddies for preempt_short
  sched/rt: Cleanup global RT bandwidth functions
  sched/rt: Move group schedulability check to sched_rt_global_validate()
  sched/rt: Skip group schedulable check with rt_group_sched=0
  sched/fair: Avoid overflow in enqueue_entity()
  sched: Use u64 for bandwidth ratio calculations
  sched/fair: Prevent negative lag increase during delayed dequeue
  sched/fair: Use sched_energy_enabled()
  sched: Handle blocked-waiter migration (and return migration)
  sched: Move attach_one_task and attach_task helpers to sched.h
  sched: Add logic to zap balance callbacks if we pick again
  sched: Add assert_balance_callbacks_empty helper
  sched/locking: Add special p->blocked_on==PROXY_WAKING value for proxy return-migration
  sched: Fix modifying donor->blocked on without proper locking
  locking: Add task::blocked_lock to serialize blocked_on state
  sched: Fix potentially missing balancing with Proxy Exec
  sched: Minimise repeated sched_proxy_exec() checking
  sched: Make class_schedulers avoid pushing current, and get rid of proxy_tag_curr()
  MAINTAINERS: Add K Prateek Nayak to scheduler reviewers
  sched/core: Get this cpu once in ttwu_queue_cond()
  ...
 2026-04-14 13:33:36 -07:00
Linus Torvalds
33c66eb5e9 Performance events changes for v7.1: 
Core updates:
 
  - Try to allocate task_ctx_data quickly, to optimize
    O(N^2) algorithm on large systems with O(100k) threads
    (Namhyung Kim)
 
 AMD PMU driver IBS support updates and fixes, by Ravi Bangoria:
 
  - Fix interrupt accounting for discarded samples
  - Fix a Zen5-specific quirk
  - Fix PhyAddrVal handling
  - Fix NMI-safety with perf_allow_kernel()
  - Fix a race between event add and NMIs
 
 Intel PMU driver updates:
 
  - Only check GP counters for PEBS constraints validation (Dapeng Mi)
 
 MSR driver:
 
  - Turn SMI_COUNT and PPERF on by default, instead of a long
    list of CPU models to enable them on (Kan Liang)
 
 Misc cleanups and fixes by Aldf Conte, Anshuman Khandual, Namhyung Kim,
 Ravi Bangoria and Yen-Hsiang Hsu.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'perf-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull performance events updates from Ingo Molnar:
 "Core updates:

   - Try to allocate task_ctx_data quickly, to optimize O(N^2) algorithm
     on large systems with O(100k) threads (Namhyung Kim)

  AMD PMU driver IBS support updates and fixes, by Ravi Bangoria:
   - Fix interrupt accounting for discarded samples
   - Fix a Zen5-specific quirk
   - Fix PhyAddrVal handling
   - Fix NMI-safety with perf_allow_kernel()
   - Fix a race between event add and NMIs

  Intel PMU driver updates:
   - Only check GP counters for PEBS constraints validation (Dapeng Mi)

  MSR driver:
   - Turn SMI_COUNT and PPERF on by default, instead of a long list of
     CPU models to enable them on (Kan Liang)

  ... and misc cleanups and fixes by Aldf Conte, Anshuman Khandual,
  Namhyung Kim, Ravi Bangoria and Yen-Hsiang Hsu"

* tag 'perf-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf/events: Replace READ_ONCE() with standard pgtable accessors
  perf/x86/msr: Make SMI and PPERF on by default
  perf/x86/intel/p4: Fix unused variable warning in p4_pmu_init()
  perf/x86/intel: Only check GP counters for PEBS constraints validation
  perf/x86/amd/ibs: Fix comment typo in ibs_op_data
  perf/amd/ibs: Advertise remote socket capability
  perf/amd/ibs: Enable streaming store filter
  perf/amd/ibs: Enable RIP bit63 hardware filtering
  perf/amd/ibs: Enable fetch latency filtering
  perf/amd/ibs: Support IBS_{FETCH|OP}_CTL2[Dis] to eliminate RMW race
  perf/amd/ibs: Add new MSRs and CPUID bits definitions
  perf/amd/ibs: Define macro for ldlat mask and shift
  perf/amd/ibs: Avoid race between event add and NMI
  perf/amd/ibs: Avoid calling perf_allow_kernel() from the IBS NMI handler
  perf/amd/ibs: Preserve PhyAddrVal bit when clearing PhyAddr MSR
  perf/amd/ibs: Limit ldlat->l3missonly dependency to Zen5
  perf/amd/ibs: Account interrupt for discarded samples
  perf/core: Simplify __detach_global_ctx_data()
  perf/core: Try to allocate task_ctx_data quickly
  perf/core: Pass GFP flags to attach_task_ctx_data()
 2026-04-14 13:22:40 -07:00
Linus Torvalds
4b2bdc2221 objtool updates for v7.1: 
- KLP support updates and fixes (Song Liu)
 
  - KLP-build script updates and fixes (Joe Lawrence)
 
  - Support Clang RAX DRAP sequence, to address clang
    false positive (Josh Poimboeuf)
 
  - Reorder ORC register numbering to match regular x86
    register numbering (Josh Poimboeuf)
 
  - Misc cleanups (Wentong Tian, Song Liu)
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'objtool-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull objtool updates from Ingo Molnar:

 - KLP support updates and fixes (Song Liu)

 - KLP-build script updates and fixes (Joe Lawrence)

 - Support Clang RAX DRAP sequence, to address clang false positive
   (Josh Poimboeuf)

 - Reorder ORC register numbering to match regular x86 register
   numbering (Josh Poimboeuf)

 - Misc cleanups (Wentong Tian, Song Liu)

* tag 'objtool-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  objtool/x86: Reorder ORC register numbering
  objtool: Support Clang RAX DRAP sequence
  livepatch/klp-build: report patch validation fuzz
  livepatch/klp-build: add terminal color output
  livepatch/klp-build: provide friendlier error messages
  livepatch/klp-build: improve short-circuit validation
  livepatch/klp-build: fix shellcheck complaints
  livepatch/klp-build: add Makefile with check target
  livepatch/klp-build: add grep-override function
  livepatch/klp-build: switch to GNU patch and recountdiff
  livepatch/klp-build: support patches that add/remove files
  objtool/klp: Correlate locals to globals
  objtool/klp: Match symbols based on demangled_name for global variables
  objtool/klp: Remove .llvm suffix in demangle_name()
  objtool/klp: Also demangle global objects
  objtool/klp: Use sym->demangled_name for symbol_name hash
  objtool/klp: Remove trailing '_' in demangle_name()
  objtool/klp: Remove redundant strcmp() in correlate_symbols()
  objtool: Use section/symbol type helpers
 2026-04-14 13:00:04 -07:00
Linus Torvalds
7393febcb1 Locking updates for v7.1: 
Mutexes:
 
  - Add killable flavor to guard definitions (Davidlohr Bueso)
  - Remove the list_head from struct mutex (Matthew Wilcox)
  - Rename mutex_init_lockep() (Davidlohr Bueso)
 
 rwsems:
 
  - Remove the list_head from struct rw_semaphore and
    replace it with a single pointer (Matthew Wilcox)
  - Fix logic error in rwsem_del_waiter() (Andrei Vagin)
 
 Semaphores:
 
  - Remove the list_head from struct semaphore (Matthew Wilcox)
 
 Jump labels:
 
  - Use ATOMIC_INIT() for initialization of .enabled (Thomas Weißschuh)
  - Remove workaround for old compilers in initializations
    (Thomas Weißschuh)
 
 Lock context analysis changes and improvements:
 
  - Add context analysis for rwsems (Peter Zijlstra)
  - Fix rwlock and spinlock lock context annotations (Bart Van Assche)
  - Fix rwlock support in <linux/spinlock_up.h> (Bart Van Assche)
  - Add lock context annotations in the spinlock implementation
    (Bart Van Assche)
  - signal: Fix the lock_task_sighand() annotation (Bart Van Assche)
  - ww-mutex: Fix the ww_acquire_ctx function annotations
    (Bart Van Assche)
  - Add lock context support in do_raw_{read,write}_trylock()
    (Bart Van Assche)
  - arm64, compiler-context-analysis: Permit alias analysis through
    __READ_ONCE() with CONFIG_LTO=y (Marco Elver)
  - Add __cond_releases() (Peter Zijlstra)
  - Add context analysis for mutexes (Peter Zijlstra)
  - Add context analysis for rtmutexes (Peter Zijlstra)
  - Convert futexes to compiler context analysis (Peter Zijlstra)
 
 Rust integration updates:
 
  - Add atomic fetch_sub() implementation (Andreas Hindborg)
  - Refactor various rust_helper_ methods for expansion (Boqun Feng)
  - Add Atomic<*{mut,const} T> support (Boqun Feng)
  - Add atomic operation helpers over raw pointers (Boqun Feng)
  - Add performance-optimal Flag type for atomic booleans, to avoid
    slow byte-sized RMWs on architectures that don't support them.
    (FUJITA Tomonori)
  - Misc cleanups and fixes (Andreas Hindborg, Boqun Feng,
    FUJITA Tomonori)
 
 LTO support updates:
 
  - arm64: Optimize __READ_ONCE() with CONFIG_LTO=y (Marco Elver)
  - compiler: Simplify generic RELOC_HIDE() (Marco Elver)
 
 Miscellaneous fixes and cleanups by Peter Zijlstra, Randy Dunlap,
 Thomas Weißschuh, Davidlohr Bueso and Mikhail Gavrilov.
 
 Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Merge tag 'locking-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Ingo Molnar:
 "Mutexes:

   - Add killable flavor to guard definitions (Davidlohr Bueso)

   - Remove the list_head from struct mutex (Matthew Wilcox)

   - Rename mutex_init_lockep() (Davidlohr Bueso)

  rwsems:

   - Remove the list_head from struct rw_semaphore and
     replace it with a single pointer (Matthew Wilcox)

   - Fix logic error in rwsem_del_waiter() (Andrei Vagin)

  Semaphores:

   - Remove the list_head from struct semaphore (Matthew Wilcox)

  Jump labels:

   - Use ATOMIC_INIT() for initialization of .enabled (Thomas Weißschuh)

   - Remove workaround for old compilers in initializations
     (Thomas Weißschuh)

  Lock context analysis changes and improvements:

   - Add context analysis for rwsems (Peter Zijlstra)

   - Fix rwlock and spinlock lock context annotations (Bart Van Assche)

   - Fix rwlock support in <linux/spinlock_up.h> (Bart Van Assche)

   - Add lock context annotations in the spinlock implementation
     (Bart Van Assche)

   - signal: Fix the lock_task_sighand() annotation (Bart Van Assche)

   - ww-mutex: Fix the ww_acquire_ctx function annotations
     (Bart Van Assche)

   - Add lock context support in do_raw_{read,write}_trylock()
     (Bart Van Assche)

   - arm64, compiler-context-analysis: Permit alias analysis through
     __READ_ONCE() with CONFIG_LTO=y (Marco Elver)

   - Add __cond_releases() (Peter Zijlstra)

   - Add context analysis for mutexes (Peter Zijlstra)

   - Add context analysis for rtmutexes (Peter Zijlstra)

   - Convert futexes to compiler context analysis (Peter Zijlstra)

  Rust integration updates:

   - Add atomic fetch_sub() implementation (Andreas Hindborg)

   - Refactor various rust_helper_ methods for expansion (Boqun Feng)

   - Add Atomic<*{mut,const} T> support (Boqun Feng)

   - Add atomic operation helpers over raw pointers (Boqun Feng)

   - Add performance-optimal Flag type for atomic booleans, to avoid
     slow byte-sized RMWs on architectures that don't support them.
     (FUJITA Tomonori)

   - Misc cleanups and fixes (Andreas Hindborg, Boqun Feng, FUJITA
     Tomonori)

  LTO support updates:

   - arm64: Optimize __READ_ONCE() with CONFIG_LTO=y (Marco Elver)

   - compiler: Simplify generic RELOC_HIDE() (Marco Elver)

  Miscellaneous fixes and cleanups by Peter Zijlstra, Randy Dunlap,
  Thomas Weißschuh, Davidlohr Bueso and Mikhail Gavrilov"

* tag 'locking-core-2026-04-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (39 commits)
  compiler: Simplify generic RELOC_HIDE()
  locking: Add lock context annotations in the spinlock implementation
  locking: Add lock context support in do_raw_{read,write}_trylock()
  locking: Fix rwlock support in <linux/spinlock_up.h>
  lockdep: Raise default stack trace limits when KASAN is enabled
  cleanup: Optimize guards
  jump_label: remove workaround for old compilers in initializations
  jump_label: use ATOMIC_INIT() for initialization of .enabled
  futex: Convert to compiler context analysis
  locking/rwsem: Fix logic error in rwsem_del_waiter()
  locking/rwsem: Add context analysis
  locking/rtmutex: Add context analysis
  locking/mutex: Add context analysis
  compiler-context-analysys: Add __cond_releases()
  locking/mutex: Remove the list_head from struct mutex
  locking/semaphore: Remove the list_head from struct semaphore
  locking/rwsem: Remove the list_head from struct rw_semaphore
  rust: atomic: Update a safety comment in impl of `fetch_add()`
  rust: sync: atomic: Update documentation for `fetch_add()`
  rust: sync: atomic: Add fetch_sub()
  ...
 2026-04-14 12:36:25 -07:00
Jakub Kicinski
35c2c39832 Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net 
Merge in late fixes in preparation for the net-next PR.

Conflicts:

include/net/sch_generic.h
  a6bd339dbb ("net_sched: fix skb memory leak in deferred qdisc drops")
  ff2998f29f ("net: sched: introduce qdisc-specific drop reason tracing")
https://lore.kernel.org/adz0iX85FHMz0HdO@sirena.org.uk

drivers/net/ethernet/airoha/airoha_eth.c
  1acdfbdb51 ("net: airoha: Fix VIP configuration for AN7583 SoC")
  bf3471e6e6 ("net: airoha: Make flow control source port mapping dependent on nbq parameter")

Adjacent changes:

drivers/net/ethernet/airoha/airoha_ppe.c
  f44218cd5e ("net: airoha: Reset PPE cpu port configuration in airoha_ppe_hw_init()")
  7da62262ec ("inet: add ip_local_port_step_width sysctl to improve port usage distribution")

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-04-14 12:04:00 -07:00
Kory Maincent
6bb6bafa88 net: pse-pd: fix kernel-doc function name for pse_control_find_by_id() 
The kernel-doc comment header incorrectly referenced the function
name pse_control_find_net_by_id() instead of the actual function name
pse_control_find_by_id(). Correct the function name in the documentation
to match the implementation.

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260414150948.744618-1-kory.maincent@bootlin.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-04-14 11:52:24 -07:00
Jakub Kicinski
18cd10d2af Merge branch 'wireguard-fixes-for-7-1-rc1' 
Jason A. Donenfeld says:

====================
WireGuard fixes for 7.1-rc1

1) Asbjørn's YNL sample, finally merged. Sorry for the wait on this one.

2) A simplification to use kfree_rcu instead of call_rcu, since
   kfree_rcu now works with kmem caches.

3) A trivial formatting derp.

4) Fix for a deadlock by moving to using exit_rtnl instead of pre_exit.
====================

Link: https://patch.msgid.link/20260414153944.2742252-1-Jason@zx2c4.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-04-14 11:48:07 -07:00
Shardul Bankar
60a25ef8da wireguard: device: use exit_rtnl callback instead of manual rtnl_lock in pre_exit 
wg_netns_pre_exit() manually acquires rtnl_lock() inside the
pernet .pre_exit callback.  This causes a hung task when another
thread holds rtnl_mutex - the cleanup_net workqueue (or the
setup_net failure rollback path) blocks indefinitely in
wg_netns_pre_exit() waiting to acquire the lock.

Convert to .exit_rtnl, introduced in commit 7a60d91c69 ("net:
Add ->exit_rtnl() hook to struct pernet_operations."), where the
framework already holds RTNL and batches all callbacks under a
single rtnl_lock()/rtnl_unlock() pair, eliminating the contention
window.

The rcu_assign_pointer(wg->creating_net, NULL) is safe to move
from .pre_exit to .exit_rtnl (which runs after synchronize_rcu())
because all RCU readers of creating_net either use maybe_get_net()
- which returns NULL for a dying namespace with zero refcount - or
access net->user_ns which remains valid throughout the entire
ops_undo_list sequence.

Reported-by: syzbot+f2fbf7478a35a94c8b7c@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?id=cb64c22a492202ca929e18262fdb8cb89e635c70
Signed-off-by: Shardul Bankar <shardul.b@mpiricsoftware.com>
[ Jason: added __net_exit and __read_mostly annotations that were missing. ]
Fixes: 900575aa33 ("wireguard: device: avoid circular netns references")
Cc: stable@vger.kernel.org
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Link: https://patch.msgid.link/20260414153944.2742252-5-Jason@zx2c4.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-04-14 11:48:04 -07:00
Jason A. Donenfeld
f364db381c wireguard: allowedips: remove redundant space 
Not a contentful commit, but amusingly found when porting ba3d7b93 to
Windows.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Link: https://patch.msgid.link/20260414153944.2742252-4-Jason@zx2c4.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-04-14 11:48:04 -07:00
Asbjørn Sloth Tønnesen
121f416756 tools: ynl: add sample for wireguard 
Add a sample application for WireGuard, using the generated C library.

The main benefit of this is to exercise the generated library,
which might be useful for future self-tests.

Example:
  $ make -C tools/net/ynl/lib
  $ make -C tools/net/ynl/generated
  $ make -C tools/net/ynl/tests wireguard
  $ ./tools/net/ynl/tests/wireguard
  usage: ./tools/net/ynl/tests/wireguard <ifindex|ifname>
  $ sudo ./tools/net/ynl/tests/wireguard wg-test
  Interface 3: wg-test
      Peer 6adfb183a4a2c94a2f92dab5ade762a4788[...]:
          Data: rx: 42 / tx: 42 bytes
          Allowed IPs:
              0.0.0.0/0
              ::/0

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Link: https://patch.msgid.link/20260414153944.2742252-3-Jason@zx2c4.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-04-14 11:48:04 -07:00
Fushuai Wang
e5549aecdd wireguard: allowedips: Use kfree_rcu() instead of call_rcu() 
Replace call_rcu() + kmem_cache_free() with kfree_rcu() to simplify
the code and reduce function size.

Signed-off-by: Fushuai Wang <wangfushuai@baidu.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Link: https://patch.msgid.link/20260414153944.2742252-2-Jason@zx2c4.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
 2026-04-14 11:48:04 -07:00
Linus Torvalds
e80d033851 Updates for the SMP core code: 
- Switch smp_call_on_cpu() to user system_percpu_wq instead of system_wq
     a part of the ongoing workqueue restructuring
 
   - Improve the CSD-lock diagnostics for smp_call_function_single() to
     provide better debug mechanisms on weakly ordered systems.
 
   - Cache the current CPU number once in smp_call_function*() instead of
     retrieving it over and over.
 
   - Add missing kernel-doc comments all over the place
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Merge tag 'smp-core-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull SMP core updates from Thomas Gleixner:

 - Switch smp_call_on_cpu() to user system_percpu_wq instead of
   system_wq a part of the ongoing workqueue restructuring

 - Improve the CSD-lock diagnostics for smp_call_function_single() to
   provide better debug mechanisms on weakly ordered systems.

 - Cache the current CPU number once in smp_call_function*() instead of
   retrieving it over and over.

 - Add missing kernel-doc comments all over the place

* tag 'smp-core-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  smp: Use system_percpu_wq instead of system_wq
  smp: Improve smp_call_function_single() CSD-lock diagnostics
  smp: Get this_cpu once in smp_call_function
  smp: Add missing kernel-doc comments
 2026-04-14 11:14:56 -07:00
Linus Torvalds
f21f7b5162 Update to the VDSO subsystem: 
- Make the handling of compat functions consistent and more robust
 
      - Rework the underlying data store so that it is dynamically
        allocated, which allows the conversion of the last holdout SPARC64
        to the generic VDSO implementation
 
      - Rework the SPARC64 VDSO to utilize the generic implementation
 
      - Mop up the left overs of the non-generic VDSO support in the core
        code.
 
      - Expand the VDSO selftest and make them more robust
 
      - Allow time namespaces to be enabled independently of the generic
        VDSO support, which was not possible before due to SPARC64 not
        using it.
 
      - Various cleanups and improvements in the related code.
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Merge tag 'timers-vdso-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull vdso updates from Thomas Gleixner:

 - Make the handling of compat functions consistent and more robust

 - Rework the underlying data store so that it is dynamically allocated,
   which allows the conversion of the last holdout SPARC64 to the
   generic VDSO implementation

 - Rework the SPARC64 VDSO to utilize the generic implementation

 - Mop up the left overs of the non-generic VDSO support in the core
   code

 - Expand the VDSO selftest and make them more robust

 - Allow time namespaces to be enabled independently of the generic VDSO
   support, which was not possible before due to SPARC64 not using it

 - Various cleanups and improvements in the related code

* tag 'timers-vdso-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (51 commits)
  timens: Use task_lock guard in timens_get*()
  timens: Use mutex guard in proc_timens_set_offset()
  timens: Simplify some calls to put_time_ns()
  timens: Add a __free() wrapper for put_time_ns()
  timens: Remove dependency on the vDSO
  vdso/timens: Move functions to new file
  selftests: vDSO: vdso_test_correctness: Add a test for time()
  selftests: vDSO: vdso_test_correctness: Use facilities from parse_vdso.c
  selftests: vDSO: vdso_test_correctness: Handle different tv_usec types
  selftests: vDSO: vdso_test_correctness: Drop SYS_getcpu fallbacks
  selftests: vDSO: vdso_test_gettimeofday: Remove nolibc checks
  Revert "selftests: vDSO: parse_vdso: Use UAPI headers instead of libc headers"
  random: vDSO: Remove ifdeffery
  random: vDSO: Trim vDSO includes
  vdso/datapage: Trim down unnecessary includes
  vdso/datapage: Remove inclusion of gettimeofday.h
  vdso/helpers: Explicitly include vdso/processor.h
  vdso/gettimeofday: Add explicit includes
  random: vDSO: Add explicit includes
  MIPS: vdso: Explicitly include asm/vdso/vdso.h
  ...
 2026-04-14 10:53:44 -07:00
Linus Torvalds
c1fe867b5b Updates for the timer/timekeeping core: 
- A rework of the hrtimer subsystem to reduce the overhead for frequently
     armed timers, especially the hrtick scheduler timer.
 
       - Better timer locality decision
 
       - Simplification of the evaluation of the first expiry time by
         keeping track of the neighbor timers in the RB-tree by providing a
         RB-tree variant with neighbor links. That avoids walking the
         RB-tree on removal to find the next expiry time, but even more
         important allows to quickly evaluate whether a timer which is
         rearmed changes the position in the RB-tree with the modified
         expiry time or not. If not, the dequeue/enqueue sequence which both
         can end up in rebalancing can be completely avoided.
 
       - Deferred reprogramming of the underlying clock event device. This
         optimizes for the situation where a hrtimer callback sets the need
         resched bit. In that case the code attempts to defer the
         re-programming of the clock event device up to the point where the
         scheduler has picked the next task and has the next hrtick timer
         armed. In case that there is no immediate reschedule or soft
         interrupts have to be handled before reaching the reschedule point
         in the interrupt entry code the clock event is reprogrammed in one
         of those code paths to prevent that the timer becomes stale.
 
       - Support for clocksource coupled clockevents
 
       	The TSC deadline timer is coupled to the TSC. The next event is
       	programmed in TSC time. Currently this is done by converting the
       	CLOCK_MONOTONIC based expiry value into a relative timeout,
       	converting it into TSC ticks, reading the TSC adding the delta
       	ticks and writing the deadline MSR.
 
 	As the timekeeping core has the conversion factors for the TSC
 	already, the whole back and forth conversion can be completely
 	avoided. The timekeeping core calculates the reverse conversion
 	factors from nanoseconds to TSC ticks and utilizes the base
 	timestamps of TSC and CLOCK_MONOTONIC which are updated once per
 	tick. This allows a direct conversion into the TSC deadline value
 	without reading the time and as a bonus keeps the deadline
 	conversion in sync with the TSC conversion factors, which are
 	updated by adjtimex() on systems with NTP/PTP enabled.
 
      - Allow inlining of the clocksource read and clockevent write
        functions when they are tiny enough, e.g. on x86 RDTSC and WRMSR.
 
     With all those enhancements in place a hrtick enabled scheduler
     provides the same performance as without hrtick. But also other hrtimer
     users obviously benefit from these optimizations.
 
   - Robustness improvements and cleanups of historical sins in the hrtimer
     and timekeeping code.
 
   - Rewrite of the clocksource watchdog.
 
     The clocksource watchdog code has over time reached the state of an
     impenetrable maze of duct tape and staples. The original design, which was
     made in the context of systems far smaller than today, is based on the
     assumption that the to be monitored clocksource (TSC) can be trivially
     compared against a known to be stable clocksource (HPET/ACPI-PM timer).
 
     Over the years this rather naive approach turned out to have major
     flaws. Long delays between the watchdog invocations can cause wrap
     arounds of the reference clocksource. The access to the reference
     clocksource degrades on large multi-sockets systems dure to
     interconnect congestion. This has been addressed with various
     heuristics which degraded the accuracy of the watchdog to the point
     that it fails to detect actual TSC problems on older hardware which
     exposes slow inter CPU drifts due to firmware manipulating the TSC to
     hide SMI time.
 
     The rewrite addresses this by:
 
       - Restricting the validation against the reference clocksource to the
         boot CPU which is usually closest to the legacy block which
         contains the reference clocksource (HPET/ACPI-PM).
 
       - Do a round robin validation betwen the boot CPU and the other CPUs
         based only on the TSC with an algorithm similar to the TSC
         synchronization code during CPU hotplug.
 
       - Being more leniant versus remote timeouts
 
   - The usual tiny fixes, cleanups and enhancements all over the place
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Merge tag 'timers-core-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull timer core updates from Thomas Gleixner:

 - A rework of the hrtimer subsystem to reduce the overhead for
   frequently armed timers, especially the hrtick scheduler timer:

     - Better timer locality decision

     - Simplification of the evaluation of the first expiry time by
       keeping track of the neighbor timers in the RB-tree by providing
       a RB-tree variant with neighbor links. That avoids walking the
       RB-tree on removal to find the next expiry time, but even more
       important allows to quickly evaluate whether a timer which is
       rearmed changes the position in the RB-tree with the modified
       expiry time or not. If not, the dequeue/enqueue sequence which
       both can end up in rebalancing can be completely avoided.

     - Deferred reprogramming of the underlying clock event device. This
       optimizes for the situation where a hrtimer callback sets the
       need resched bit. In that case the code attempts to defer the
       re-programming of the clock event device up to the point where
       the scheduler has picked the next task and has the next hrtick
       timer armed. In case that there is no immediate reschedule or
       soft interrupts have to be handled before reaching the reschedule
       point in the interrupt entry code the clock event is reprogrammed
       in one of those code paths to prevent that the timer becomes
       stale.

     - Support for clocksource coupled clockevents

       The TSC deadline timer is coupled to the TSC. The next event is
       programmed in TSC time. Currently this is done by converting the
       CLOCK_MONOTONIC based expiry value into a relative timeout,
       converting it into TSC ticks, reading the TSC adding the delta
       ticks and writing the deadline MSR.

       As the timekeeping core has the conversion factors for the TSC
       already, the whole back and forth conversion can be completely
       avoided. The timekeeping core calculates the reverse conversion
       factors from nanoseconds to TSC ticks and utilizes the base
       timestamps of TSC and CLOCK_MONOTONIC which are updated once per
       tick. This allows a direct conversion into the TSC deadline value
       without reading the time and as a bonus keeps the deadline
       conversion in sync with the TSC conversion factors, which are
       updated by adjtimex() on systems with NTP/PTP enabled.

     - Allow inlining of the clocksource read and clockevent write
       functions when they are tiny enough, e.g. on x86 RDTSC and WRMSR.

   With all those enhancements in place a hrtick enabled scheduler
   provides the same performance as without hrtick. But also other
   hrtimer users obviously benefit from these optimizations.

 - Robustness improvements and cleanups of historical sins in the
   hrtimer and timekeeping code.

 - Rewrite of the clocksource watchdog.

   The clocksource watchdog code has over time reached the state of an
   impenetrable maze of duct tape and staples. The original design,
   which was made in the context of systems far smaller than today, is
   based on the assumption that the to be monitored clocksource (TSC)
   can be trivially compared against a known to be stable clocksource
   (HPET/ACPI-PM timer).

   Over the years this rather naive approach turned out to have major
   flaws. Long delays between the watchdog invocations can cause wrap
   arounds of the reference clocksource. The access to the reference
   clocksource degrades on large multi-sockets systems dure to
   interconnect congestion. This has been addressed with various
   heuristics which degraded the accuracy of the watchdog to the point
   that it fails to detect actual TSC problems on older hardware which
   exposes slow inter CPU drifts due to firmware manipulating the TSC to
   hide SMI time.

   The rewrite addresses this by:

     - Restricting the validation against the reference clocksource to
       the boot CPU which is usually closest to the legacy block which
       contains the reference clocksource (HPET/ACPI-PM).

     - Do a round robin validation betwen the boot CPU and the other
       CPUs based only on the TSC with an algorithm similar to the TSC
       synchronization code during CPU hotplug.

     - Being more leniant versus remote timeouts

 - The usual tiny fixes, cleanups and enhancements all over the place

* tag 'timers-core-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (75 commits)
  alarmtimer: Access timerqueue node under lock in suspend
  hrtimer: Fix incorrect #endif comment for BITS_PER_LONG check
  posix-timers: Fix stale function name in comment
  timers: Get this_cpu once while clearing the idle state
  clocksource: Rewrite watchdog code completely
  clocksource: Don't use non-continuous clocksources as watchdog
  x86/tsc: Handle CLOCK_SOURCE_VALID_FOR_HRES correctly
  MIPS: Don't select CLOCKSOURCE_WATCHDOG
  parisc: Remove unused clocksource flags
  hrtimer: Add a helper to retrieve a hrtimer from its timerqueue node
  hrtimer: Remove trailing comma after HRTIMER_MAX_CLOCK_BASES
  hrtimer: Mark index and clockid of clock base as const
  hrtimer: Drop unnecessary pointer indirection in hrtimer_expire_entry event
  hrtimer: Drop spurious space in 'enum hrtimer_base_type'
  hrtimer: Don't zero-initialize ret in hrtimer_nanosleep()
  hrtimer: Remove hrtimer_get_expires_ns()
  timekeeping: Mark offsets array as const
  timekeeping/auxclock: Consistently use raw timekeeper for tk_setup_internals()
  timer_list: Print offset as signed integer
  tracing: Use explicit array size instead of sentinel elements in symbol printing
  ...
 2026-04-14 10:27:07 -07:00
Linus Torvalds
1d5e40351e A small update for the MSI interrupt library to check for callers which 
fail to provide the mandatory irq_write_msi_msg() callback, which prevents
 a NULL pointer dereference later.
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Merge tag 'irq-msi-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull MSI interrupt update from Thomas Gleixner:
 "A small update for the MSI interrupt library to check for callers
  which fail to provide the mandatory irq_write_msi_msg() callback,
  which prevents a NULL pointer dereference later"

* tag 'irq-msi-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/msi-lib: Refuse initialization when irq_write_msi_msg() is missing
 2026-04-14 10:23:19 -07:00
Linus Torvalds
c0ecb2a9ee Updates for the interrupt chip driver subsystem: 
- A large refactoring for the Renesas RZV2H driver to add new interrupt
     types cleanly.
 
   - A large refactoring for the Renesas RZG2L driver to add support the new
     RZ/G3L variant.
 
   - Add support for the new NXP S32N79 chip in the IMX irq-steer driver.
 
   - Add support for the Apple AICv3 variant
 
   - Enhance the Loongson PCH LPC driver so it can be used on MIPS with
     device tree firmware
 
   - Allow the PIC32 EVIC driver to be built independent of MIPS in compile
     tests.
 
   - The usual small fixes and enhancements all over the place
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Merge tag 'irq-drivers-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull interrupt chip driver updates from Thomas Gleixner:

 - A large refactoring for the Renesas RZV2H driver to add new interrupt
   types cleanly

 - A large refactoring for the Renesas RZG2L driver to add support the
   new RZ/G3L variant

 - Add support for the new NXP S32N79 chip in the IMX irq-steer driver

 - Add support for the Apple AICv3 variant

 - Enhance the Loongson PCH LPC driver so it can be used on MIPS with
   device tree firmware

 - Allow the PIC32 EVIC driver to be built independent of MIPS in
   compile tests

 - The usual small fixes and enhancements all over the place

* tag 'irq-drivers-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (46 commits)
  irqchip/irq-pic32-evic: Add __maybe_unused for board_bind_eic_interrupt in COMPILE_TEST
  irqchip/renesas-rzv2h: Kill icu_err string
  irqchip/renesas-rzv2h: Kill swint_names[]
  irqchip/renesas-rzv2h: Kill swint_idx[]
  irqchip/renesas-rzg2l: Add NMI support
  irqchip/renesas-rzg2l: Clear the shared interrupt bit in rzg2l_irqc_free()
  irqchip/renesas-rzg2l: Replace raw_spin_{lock,unlock} with guard() in rzg2l_irq_set_type()
  irqchip/gic-v3: Print a warning for out-of-range interrupt numbers
  irqchip/renesas-rzg2l: Add shared interrupt support
  irqchip/renesas-rzg2l: Add RZ/G3L support
  irqchip/renesas-rzg2l: Drop IRQC_IRQ_COUNT macro
  irqchip/renesas-rzg2l: Drop IRQC_TINT_START macro
  irqchip/renesas-rzg2l: Drop IRQC_NUM_IRQ macro
  irqchip/renesas-rzg2l: Dynamically allocate fwspec array
  irqchip/renesas-rzg2l: Split rzfive_irqc_{mask,unmask} into separate IRQ and TINT handlers
  irqchip/renesas-rzg2l: Split rzfive_tint_irq_endisable() into separate IRQ and TINT helpers
  irqchip/renesas-rzg2l: Replace rzg2l_irqc_irq_{enable,disable} with TINT-specific handlers
  irqchip/renesas-rzg2l: Split set_type handler into separate IRQ and TINT functions
  irqchip/renesas-rzg2l: Split EOI handler into separate IRQ and TINT functions
  irqchip/renesas-rzg2l: Replace single irq_chip with per-region irq_chip instances
  ...
 2026-04-14 10:18:10 -07:00
Linus Torvalds
db23954eea Update for the core interrupt subsystem: 
- Invoke add_interrupt_randomness() in handle_percpu_devid_irq() and
      cleanup the workaround in the Hyper-V driver, which would now invoke
      it twice on ARM64. Removing it from the driver requires to add it to
      the x86 system vector entry point.
 
    - Remove the pointles cpu_read_lock() around reading CPU possible mask,
      which is read only after init.
 
    - Add documentation for the interaction between device tree bindings and
      the interrupt type defines in irq.h.
 
    - Delete stale defines in the matrix allocator and the equivalent in
      loongarch.
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Merge tag 'irq-core-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull core irq updates from Thomas Gleixner:

 - Invoke add_interrupt_randomness() in handle_percpu_devid_irq() and
   cleanup the workaround in the Hyper-V driver, which would now invoke
   it twice on ARM64. Removing it from the driver requires to add it to
   the x86 system vector entry point

 - Remove the pointles cpu_read_lock() around reading CPU possible mask,
   which is read only after init

 - Add documentation for the interaction between device tree bindings
   and the interrupt type defines in irq.h

 - Delete stale defines in the matrix allocator and the equivalent in
   loongarch

* tag 'irq-core-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Drivers: hv: Move add_interrupt_randomness() to hypervisor callback sysvec
  genirq/chip: Invoke add_interrupt_randomness() in handle_percpu_devid_irq()
  genirq/affinity: Remove cpus_read_lock() while reading cpu_possible_mask
  genirq/matrix, LoongArch: Delete IRQ_MATRIX_BITS leftovers
  genirq: Document interaction between <linux/irq.h> and DT binding defines
 2026-04-14 10:02:41 -07:00
Linus Torvalds
2ad332b0e2 A trivial update for debugobjects to drop a pointless likely() around 
IS_ERR_OR_NULL().
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Merge tag 'core-debugobjects-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull debugobjects update from Thomas Gleixner:
 "A trivial update for debugobjects to drop a pointless likely() around
  IS_ERR_OR_NULL()"

* tag 'core-debugobjects-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  debugobjects: Drop likely() around !IS_ERR_OR_NULL()
 2026-04-14 09:48:39 -07:00
Linus Torvalds
15a1bccddc A trivial update for the entry code adding missing kernel documentation for 
function arguments.
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Merge tag 'core-entry-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull entry code update from Thomas Gleixner:
 "A trivial update for the entry code adding missing kernel
  documentation for function arguments"

* tag 'core-entry-2026-04-12' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  entry: Add missing kernel-doc for arch_ptrace_report_syscall functions
 2026-04-14 09:45:24 -07:00
Linus Torvalds
5d0d362330 Kbuild/Kconfig updates for 7.1 
Kbuild changes
 ==============
 
   * tools/build: Reject unexpected values for LLVM=
 
   * kbuild: uapi: remove usage of toolchain headers
 
   * kbuild: Switch from '-fms-extensions' to '-fms-anonymous-structs'
     when available (currently: clang >= 23.0.0)
 
   * kbuild: Reduce the number of compiler-generated suffixes for clang
     thin-lto build
 
   * kbuild: reduce output spam ("GEN Makefile") when building out of tree
 
   * check-uapi: improve portability for testing headers
 
   * uapi: also test UAPI headers against C++ compilers
 
   * kbuild: vdso_install: drop build ID architecture allow-list
 
   * checksyscalls: only run when necessary
 
   * Documentation: kbuild: Update the debug information notes in
     reproducible-builds.rst
 
   * kconfig: forbid multiple entries with the same symbol in a choice
 
   * kbuild: expand inlining hints with -fdiagnostics-show-inlining-chain
 
 Kconfig changes
 ===============
 
   * kconfig: Error out on duplicated kconfig inclusion
 
 Cc: Alexander Coffin <alex@cyberialabs.net>
 Cc: Ard Biesheuvel <ardb@kernel.org>
 Cc: Arnd Bergmann <arnd@arndb.de>
 Cc: Bill Wendling <morbo@google.com>
 Cc: David Howells <dhowells@redhat.com>
 Cc: Dodji Seketeli <dodji@seketeli.org>
 Cc: H. Peter Anvin <hpa@zytor.com>
 Cc: Helge Deller <deller@gmx.de>
 Cc: John Moon <john@jmoon.dev>
 Cc: Jonathan Corbet <corbet@lwn.net>
 Cc: Josh Poimboeuf <jpoimboe@kernel.org>
 Cc: Justin Stitt <justinstitt@google.com>
 Cc: Kees Cook <kees@kernel.org>
 Cc: Masahiro Yamada <masahiroy@kernel.org>
 Cc: Nathan Chancellor <nathan@kernel.org>
 Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com>
 Cc: Shuah Khan <skhan@linuxfoundation.org>
 Cc: Song Liu <song@kernel.org>
 Cc: Thomas Weißschuh <linux@weissschuh.net>
 Cc: Yonghong Song <yonghong.song@linux.dev>
 Cc: kernel-team@fb.com
 Cc: linux-arm-kernel@lists.infradead.org
 Cc: linux-efi@vger.kernel.org
 Cc: linux-hexagon@vger.kernel.org
 Cc: linux-kbuild@vger.kernel.org
 Cc: linux-kernel@vger.kernel.org
 Cc: linux-parisc@vger.kernel.org
 Cc: linux-s390@vger.kernel.org
 Cc: linuxppc-dev@lists.ozlabs.org
 Cc: llvm@lists.linux.dev
 Cc: loongarch@lists.linux.dev
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Merge tag 'kbuild-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux

Pull Kbuild/Kconfig updates from Nicolas Schier:
 "Kbuild:
   - reject unexpected values for LLVM=
   - uapi: remove usage of toolchain headers
   - switch from '-fms-extensions' to '-fms-anonymous-structs' when
     available (currently: clang >= 23.0.0)
   - reduce the number of compiler-generated suffixes for clang thin-lto
     build
   - reduce output spam ("GEN Makefile") when building out of tree
   - improve portability for testing headers
   - also test UAPI headers against C++ compilers
   - drop build ID architecture allow-list in vdso_install
   - only run checksyscalls when necessary
   - update the debug information notes in reproducible-builds.rst
   - expand inlining hints with -fdiagnostics-show-inlining-chain

  Kconfig:
   - forbid multiple entries with the same symbol in a choice
   - error out on duplicated kconfig inclusion"

* tag 'kbuild-7.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kbuild/linux: (35 commits)
  kbuild: expand inlining hints with -fdiagnostics-show-inlining-chain
  kconfig: forbid multiple entries with the same symbol in a choice
  Documentation: kbuild: Update the debug information notes in reproducible-builds.rst
  checksyscalls: move instance functionality into generic code
  checksyscalls: only run when necessary
  checksyscalls: fail on all intermediate errors
  checksyscalls: move path to reference table to a variable
  kbuild: vdso_install: drop build ID architecture allow-list
  kbuild: vdso_install: gracefully handle images without build ID
  kbuild: vdso_install: hide readelf warnings
  kbuild: vdso_install: split out the readelf invocation
  kbuild: uapi: also test UAPI headers against C++ compilers
  kbuild: uapi: provide a C++ compatible dummy definition of NULL
  kbuild: uapi: handle UML in architecture-specific exclusion lists
  kbuild: uapi: move all include path flags together
  kbuild: uapi: move some compiler arguments out of the command definition
  check-uapi: use dummy libc includes
  check-uapi: honor ${CROSS_COMPILE} setting
  check-uapi: link into shared objects
  kbuild: reduce output spam when building out of tree
  ...
 2026-04-14 09:18:40 -07:00
Linus Torvalds
a970ed1881 bitmap updates for v7.1 
- new API: bitmap_weight_from() and bitmap_weighted_xor() (Yury);
  - drop unused __find_nth_andnot_bit() (Yury);
  - new tests and test improvements (Andy, Akinobu, Yury);
  - fixes for count_zeroes API (Yury);
  - cleanup bitmap_print_to_pagebuf() mess (Yury);
  - documentation updates (Andy, Kai, Kit).
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Merge tag 'bitmap-for-v7.1' of https://github.com/norov/linux

Pull bitmap updates from Yury Norov:

 - new API: bitmap_weight_from() and bitmap_weighted_xor() (Yury)

 - drop unused __find_nth_andnot_bit() (Yury)

 - new tests and test improvements (Andy, Akinobu, Yury)

 - fixes for count_zeroes API (Yury)

 - cleanup bitmap_print_to_pagebuf() mess (Yury)

 - documentation updates (Andy, Kai, Kit).

* tag 'bitmap-for-v7.1' of https://github.com/norov/linux: (24 commits)
  bitops: Update kernel-doc for sign_extendXX()
  powerpc/xive: simplify xive_spapr_debug_show()
  thermal: intel: switch cpumask_get() to using cpumask_print_to_pagebuf()
  coresight: don't use bitmap_print_to_pagebuf()
  lib/prime_numbers: drop temporary buffer in dump_primes()
  drm/xe: switch xe_pagefault_queue_init() to using bitmap_weighted_or()
  ice: use bitmap_empty() in ice_vf_has_no_qs_ena
  ice: use bitmap_weighted_xor() in ice_find_free_recp_res_idx()
  bitmap: introduce bitmap_weighted_xor()
  bitmap: add test_zero_nbits()
  bitmap: exclude nbits == 0 cases from bitmap test
  bitmap: test bitmap_weight() for more
  asm-generic/bitops: Fix a comment typo in instrumented-atomic.h
  bitops: fix kernel-doc parameter name for parity8()
  lib: count_zeros: unify count_{leading,trailing}_zeros()
  lib: count_zeros: fix 32/64-bit inconsistency in count_trailing_zeros()
  lib: crypto: fix comments for count_leading_zeros()
  x86/topology: use bitmap_weight_from()
  bitmap: add bitmap_weight_from()
  lib/find_bit_benchmark: avoid clearing randomly filled bitmap in test_find_first_bit()
  ...
 2026-04-14 08:55:18 -07:00
Linus Torvalds
5181afcdf9 A busier cycle than I had expected for docs, including: 
- Translations: some overdue updates to the Japanese translations, Chinese
   translations for some of the Rust documentation, and the beginnings of a
   Portuguese translation.
 
 - New documents covering CPU isolation, managed interrupts, debugging
   Python gbb scripts, and more.
 
 - More tooling work from Mauro, reducing docs-build warnings, adding self
   tests, improving man-page output, bringing in a proper C tokenizer to
   replace (some of) the mess of kernel-doc regexes, and more.
 
 - Update and synchronize changes.rst and scripts/ver_linux, and put both
   into alphabetical order.
 
 ...and a long list of documentation updates, typo fixes, and general
 improvements.
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Merge tag 'docs-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux

Pull documentation updates from Jonathan Corbet:
 "A busier cycle than I had expected for docs, including:

   - Translations: some overdue updates to the Japanese translations,
     Chinese translations for some of the Rust documentation, and the
     beginnings of a Portuguese translation.

   - New documents covering CPU isolation, managed interrupts, debugging
     Python gbb scripts, and more.

   - More tooling work from Mauro, reducing docs-build warnings, adding
     self tests, improving man-page output, bringing in a proper C
     tokenizer to replace (some of) the mess of kernel-doc regexes, and
     more.

   - Update and synchronize changes.rst and scripts/ver_linux, and put
     both into alphabetical order.

  ... and a long list of documentation updates, typo fixes, and general
  improvements"

* tag 'docs-7.1' of git://git.kernel.org/pub/scm/linux/kernel/git/docs/linux: (162 commits)
  Documentation: core-api: real-time: correct spelling
  doc: Add CPU Isolation documentation
  Documentation: Add managed interrupts
  Documentation: seq_file: drop 2.6 reference
  docs/zh_CN: update rust/index.rst translation
  docs/zh_CN: update rust/quick-start.rst translation
  docs/zh_CN: update rust/coding-guidelines.rst translation
  docs/zh_CN: update rust/arch-support.rst translation
  docs/zh_CN: sync process/2.Process.rst with English version
  docs/zh_CN: fix an inconsistent statement in dev-tools/testing-overview
  tracing: Documentation: Update histogram-design.rst for fn() handling
  docs: sysctl: Add documentation for /proc/sys/xen/
  Docs: hid: intel-ish-hid: make long URL usable
  Documentation/kernel-parameters: fix architecture alignment for pt, nopt, and nobypass
  sched/doc: Update yield_task description in sched-design-CFS
  Documentation/rtla: Convert links to RST format
  docs: fix typos and duplicated words across documentation
  docs: fix typo in zoran driver documentation
  docs: add an Assisted-by mention to submitting-patches.rst
  Revert "scripts/checkpatch: add Assisted-by: tag validation"
  ...
 2026-04-14 08:47:08 -07:00