Commit Graph

1447071 Commits

Author SHA1 Message Date
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
Bharath SM
abce65948c smb: client: add tracepoints for deferred handle caching
Add tracepoints to observe handle caching behavior.

smb3_open_cached: emitted when an open reuses a cached handle from
a previous deferred close, avoiding a network round-trip

smb3_close_cached: emitted when a close is deferred (handle cached
for potential reuse by subsequent opens)

Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2026-04-14 13:04:21 -05:00
Bharath SM
4c46b677f3 smb: client: add oplock level to smb3_open_done tracepoint
Add an oplock field to the smb3_open_done_class trace event to
show the granted oplock/lease level. Move the trace_smb3_open_done
call after smb2_parse_contexts() so the oplock value reflects
the parsed lease state (R/W/H flags).

Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2026-04-14 13:04:21 -05:00
Bharath SM
afab3f61ae smb: client: add tracepoint for local lock conflicts
Add smb3_lock_conflict tracepoint that fires when a byte-range
lock request conflicts with an existing cached lock. This helps
debug lock contention issues when locks are cached locally due
to oplocks/leases.

The trace includes both the requested and conflicting lock details:
- Requested: offset, length, type
- Conflicting: offset, length, type, pid (lock holder)

Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2026-04-14 13:04:21 -05:00
Bharath SM
eb4d3691fc smb: client: add tracepoints for lock operations
Add tracepoints when lock operations are sent to the
server with details including lock offset, length, and flags.

smb3_lock_enter: before sending lock request
smb3_lock_done: lock acquired successfully
smb3_lock_err: lock request failed
smb3_lock_cached: lock granted from local cache (no server roundtrip)

Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
2026-04-14 13:04:21 -05:00
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
Paulo Alcantara
15e9e00a5a vfs: get rid of BUG_ON() in d_mark_tmpfile_name()
Do proper error handling in d_mark_tmpfile_name() by returning errors
rather than using BUG_ON()'s.

Adjust caller to check for errors from d_mark_tmpfile_name() as well
as clean it up for using return value from scnprintf() in QSTR_LEN()
to make it more obvious where the tmpfile name's length is coming
from.

Link: https://lore.kernel.org/r/CAHk-=wgerpUKCDhdzKH0FEdLyfhj3doc9t+kO9Yb6rSsTp7hdQ@mail.gmail.com
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: David Howells <dhowells@redhat.com>
Signed-off-by: Paulo Alcantara (Red Hat) <pc@manguebit.org>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Jan Kara <jack@suse.cz>
CC: linux-fsdevel@vger.kernel.org
Cc: linux-cifs@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
2026-04-14 12:01:12 -05:00
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
Krzysztof Kozlowski
41d7004ab4 TI K3 device tree updates for v7.1 part2
Late addition:
 - Use memory-region-names for r5f across K3 SoCs
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Merge tag 'ti-k3-dt-for-v7.1-part2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/ti/linux into soc/dt

TI K3 device tree updates for v7.1 part2

Late addition:
- Use memory-region-names for r5f across K3 SoCs

* tag 'ti-k3-dt-for-v7.1-part2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/ti/linux:
  arm64: dts: ti: k3: Use memory-region-names for r5f

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
2026-04-14 18:43:28 +02:00
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
Krishna Chomal
344bf523d4
platform/x86: hp-wmi: Add support for Omen 16-wf1xxx (8C77)
The HP Omen 16-wf1xxx (board ID: 8C77) has the same WMI interface as
other Victus S boards, but requires quirks for correctly switching
thermal profile.

Add the DMI board name to victus_s_thermal_profile_boards[] table and
map it to omen_v1_thermal_params.

Testing on board 8C77 confirmed that platform profile is registered
successfully and fan RPMs are readable and controllable.

Tested-by: Thomas Arici <absolute3d86@gmail.com>
Reported-by: Thomas Arici <absolute3d86@gmail.com>
Closes: https://bugzilla.kernel.org/show_bug.cgi?id=221300
Signed-off-by: Krishna Chomal <krishna.chomal108@gmail.com>
Link: https://patch.msgid.link/20260410191039.125659-5-krishna.chomal108@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
2026-04-14 19:00:18 +03:00
Krishna Chomal
899225257e
platform/x86: hp-wmi: Add support for Omen 16-n0xxx (8A44)
The HP Omen 16-n0xxx (board ID: 8A44) has the same WMI interface as
other Victus S boards, but requires quirks for correctly switching
thermal profile.

Add the DMI board name to victus_s_thermal_profile_boards[] table and
map it to omen_v1_legacy_thermal_params.

Testing on board 8A44 confirmed that platform profile is registered
successfully and fan RPMs are readable and controllable.

Tested-by: Prasoon Dev <prasoon5050@outlook.com>
Signed-off-by: Krishna Chomal <krishna.chomal108@gmail.com>
Link: https://patch.msgid.link/20260410191039.125659-4-krishna.chomal108@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
2026-04-14 19:00:16 +03:00
Krishna Chomal
5badf5ebcd
platform/x86: hp-wmi: Add support for OMEN MAX 16-ak0xxx (8D87)
The HP OMEN MAX 16-ak0xxx (8D87) requires the same WMI queries as other
Victus S devices, hence it has been added to the corresponding list.

For this reason, platform_profile_victus_s_get_ec() will be called
during thermal_profile_setup() and victus_s_powersource_event() to
obtain hardware state (platform profile) by reading from the Embedded
Controller, however, this particular board's EC does not seem to expose
the platform profile value, unlike other boards. Hence EC readback is
disabled.

Testing on board 8D87 confirmed that platform profile is registered
successfully and fan RPMs are readable and controllable.

Tested-by: Jinyang Zhu <Jakie101@proton.me>
Signed-off-by: Krishna Chomal <krishna.chomal108@gmail.com>
Link: https://patch.msgid.link/20260410191039.125659-3-krishna.chomal108@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
2026-04-14 19:00:14 +03:00
Krishna Chomal
9d317a54e4
platform/x86: hp-wmi: fix fan table parsing
For Victus S devices, the BIOS fan table header was being incorrectly
parsed as:
struct {
	u8 unknown;
	u8 num_entries;
}

The first field should be num_fans and the second should be unknown. It
is pure coincidence that interpreting an "unknown" field as "num_entries"
worked on multiple device, however for board 8D87 (in an upcoming patch),
this assumption fails, and the hp-wmi driver fails to load.

We fix this by correcting the header definition and compensating for
num_entries by parsing each entry of the fan table until an all-NULL row
is obtained, mirroring the behavior of OMEN Gaming Hub on Windows.

Fixes: 46be1453e6 ("platform/x86: hp-wmi: add manual fan control for Victus S models")
Signed-off-by: Krishna Chomal <krishna.chomal108@gmail.com>
Link: https://patch.msgid.link/20260410191039.125659-2-krishna.chomal108@gmail.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
2026-04-14 19:00:11 +03:00
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
Sami Mujawar
e534e9d13d virt: arm-cca-guest: fix error check for RSI_INCOMPLETE
The RSI interface can return RSI_INCOMPLETE when a report spans
multiple granules. This is an expected condition and should not be
treated as a fatal error.

Currently, arm_cca_report_new() checks for `info.result != RSI_SUCCESS`
and bails out, which incorrectly flags RSI_INCOMPLETE as a failure.
Fix the check to only break out on results other than RSI_SUCCESS or
RSI_INCOMPLETE.

This ensures partial reports are handled correctly and avoids spurious
-ENXIO errors when generating attestation reports.

Fixes: 7999edc484 ("virt: arm-cca-guest: TSM_REPORT support for realms")
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reported-by: Jagdish Gediya <Jagdish.Gediya@arm.com>
Reviewed-by: Steven Price <steven.price@arm.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Reviewed-by: Yeoreum Yun <yeoreum.yun@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2026-04-14 16:26:08 +01:00
Mark Brown
680b961ebf arm64/hwcap: Include kernel-hwcap.h in list of generated files
When adding generation for the kernel internal constants for hwcaps the
generated file was not explicitly flagged as such in the build system,
causing it to be regenerated on each build. This wasn't obvious when the
series the change was included in was developed since it was all about
changes that trigger rebuilds anyway.

Fixes: abed23c3c4 ("arm64/hwcap: Generate the KERNEL_HWCAP_ definitions for the hwcaps")
Reported-by: Marek Vasut <marex@nabladev.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2026-04-14 16:23:40 +01:00
Daniel Borkmann
bc28831d7a MAINTAINERS: Add netkit selftest files
The following selftest files are related to netkit and should have
netkit folks in Cc for review:

  - tools/testing/selftests/bpf/prog_tests/tc_netkit.c
  - tools/testing/selftests/drivers/net/hw/nk_qlease.py
  - tools/testing/selftests/net/nk_qlease.py

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20260414075249.611608-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-14 08:19:39 -07:00
Jakub Kicinski
2d7e20c988 Merge branch 'follow-ups-to-nk_qlease-net-selftests'
Daniel Borkmann says:

====================
Follow-ups to nk_qlease net selftests

This is a set of follow-ups addressing [0]:

- Split netdevsim tests from HW tests in nk_qlease and move the SW
  tests under selftests/net/
- Remove multiple ksft_run()s to fix the recently enforced hard-fail
- Move all the setup inside the test cases for the ones under
  selftests/net/ (I'll defer the HW ones to David)
- Add more test coverage related to queue leasing behavior and corner
  cases, so now we have 45 tests in nk_qlease.py with netdevsim
  which does not need special HW
====================

Link: https://patch.msgid.link/20260413220809.604592-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-14 08:17:06 -07:00
Daniel Borkmann
1e822171ba selftests/net: Add additional test coverage in nk_qlease
Add further netkit queue-lease coverage for netns lifecycle of the guest
and physical halves, channel resize across active leases, single-device
and multi-lessee scenarios, L3 mode operation, lease capacity exhaustion,
and corner-cases of e.g. queue-create rejection paths. Also make the tests
more robust by removing the time.sleep(0.1) after netns deletion and turn
them into a wait loop.

Full test run:

  # ./nk_qlease.py
  TAP version 13
  1..45
  ok 1 nk_qlease.test_remove_phys
  ok 2 nk_qlease.test_double_lease
  ok 3 nk_qlease.test_virtual_lessor
  ok 4 nk_qlease.test_phys_lessee
  ok 5 nk_qlease.test_different_lessors
  ok 6 nk_qlease.test_queue_out_of_range
  ok 7 nk_qlease.test_resize_leased
  ok 8 nk_qlease.test_self_lease
  ok 9 nk_qlease.test_create_tx_type
  ok 10 nk_qlease.test_create_primary
  ok 11 nk_qlease.test_create_limit
  ok 12 nk_qlease.test_link_flap_phys
  ok 13 nk_qlease.test_queue_get_virtual
  ok 14 nk_qlease.test_remove_virt_first
  ok 15 nk_qlease.test_multiple_leases
  ok 16 nk_qlease.test_lease_queue_tx_type
  ok 17 nk_qlease.test_invalid_netns
  ok 18 nk_qlease.test_invalid_phys_ifindex
  ok 19 nk_qlease.test_multi_netkit_remove_phys
  ok 20 nk_qlease.test_single_remove_phys
  ok 21 nk_qlease.test_link_flap_virt
  ok 22 nk_qlease.test_phys_queue_no_lease
  ok 23 nk_qlease.test_same_ns_lease
  ok 24 nk_qlease.test_resize_after_unlease
  ok 25 nk_qlease.test_lease_queue_zero
  ok 26 nk_qlease.test_release_and_reuse
  ok 27 nk_qlease.test_veth_queue_create
  ok 28 nk_qlease.test_two_netkits_same_queue
  ok 29 nk_qlease.test_l3_mode_lease
  ok 30 nk_qlease.test_single_double_lease
  ok 31 nk_qlease.test_single_different_lessors
  ok 32 nk_qlease.test_cross_ns_netns_id
  ok 33 nk_qlease.test_delete_guest_netns
  ok 34 nk_qlease.test_move_guest_netns
  ok 35 nk_qlease.test_resize_phys_no_reduction
  ok 36 nk_qlease.test_delete_one_netkit_of_two
  ok 37 nk_qlease.test_bind_rx_leased_phys_queue
  ok 38 nk_qlease.test_resize_phys_shrink_past_leased
  ok 39 nk_qlease.test_resize_virt_not_supported
  ok 40 nk_qlease.test_lease_devices_down
  ok 41 nk_qlease.test_lease_capacity_exhaustion
  ok 42 nk_qlease.test_resize_phys_up
  ok 43 nk_qlease.test_multi_ns_lease
  ok 44 nk_qlease.test_multi_ns_delete_one
  ok 45 nk_qlease.test_move_phys_netns
  # Totals: pass:45 fail:0 xfail:0 xpass:0 skip:0 error:0

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20260413220809.604592-4-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-14 08:17:02 -07:00
Daniel Borkmann
e254ffb950 selftests/net: Split netdevsim tests from HW tests in nk_qlease
As pointed out in 3d2c3d2eea ("selftests: net: py: explicitly forbid
multiple ksft_run() calls"), ksft_run() cannot be called multiple times.

Move the netdevsim-based queue lease tests to selftests/net/ so that
each file has exactly one ksft_run() call.

The HW tests (io_uring ZC RX, queue attrs, XDP with MP, destroy) remain
in selftests/drivers/net/hw/.

Fixes: 65d657d806 ("selftests/net: Add queue leasing tests with netkit")
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/netdev/20260409181950.7e099b6c@kernel.org
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20260413220809.604592-3-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-14 08:17:01 -07:00
Daniel Borkmann
4a6fe5fe60 tools/ynl: Make YnlFamily closeable as a context manager
YnlFamily opens an AF_NETLINK socket in __init__ but has no way
to release it other than leaving it to the GC. YnlFamily holds a
self reference cycle through SpecFamily's self.family = self
in its super().__init__() call, so refcount GC cannot reclaim
it and the socket stays open until the cyclic GC runs.

If a test creates a guest netns, instantiates a YnlFamily inside
it via NetNSEnter(), performs some test case work via Ynl, and
then deletes the netns, then the 'ip netns del' only drops the
mount binding and cleanup_net in the kernel never runs, so any
subsequent test case assertions that objects got cleaned up would
fail given this only gets triggered later via cyclic GC run.

Add an explicit close() that closes the netlink socket and wire
up the __enter__/__exit__ so callers can scope the instance
deterministically via 'with YnlFamily(...) as ynl: ...'.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20260413220809.604592-2-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2026-04-14 08:17:01 -07:00
Steven Rostedt
43cec30c44 tracefs: Removed unused 'ret' variable in eventfs_iterate()
Moving to guard() usage removed the need of using the 'ret' variable but
it wasn't removed. As it was set to zero, the compiler in use didn't warn
(although some compilers do).

Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Link: https://patch.msgid.link/20260414110344.75c0663f@robin
Fixes: 4d9b262031 ("eventfs: Simplify code using guard()s")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202604100111.AAlbQKmK-lkp@intel.com/
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2026-04-14 11:08:24 -04:00
Tetsuo Handa
8fc1ad9007 tomoyo: use u64 for holding inode->i_ino value
TOMOYO is treating numeric fields (including inode->i_ino) as "unsigned
long". Now that commit 0b2600f81c ("treewide: change inode->i_ino from
unsigned long to u64") went upstream, update affected portions in TOMOYO.

While an administrator might write a rule that compares inode->i_ino with
an immediate value, this patch changes type of variable for inode->i_ino
to "u64" but does not change type of variable for the corresponding
immediate value to "u64" due to the following reasons.

  It is likely that rules that compare inode->i_ino are for testing whether
  the directories involved in e.g. rename() operation are the same (i.e.
  comparison between two inode->i_ino values rather than one inode->i_ino
  value and one immediate value).

  It unlikely makes sense to compare inode->i_ino with an immediate value
  larger than UINT_MAX.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
2026-04-15 00:00:10 +09:00
Thorsten Blum
aea645c02f lib/vsprintf: use bool for local decode variable
The local variable 'decode' is only used as a boolean value - change its
data type from int to bool accordingly.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://patch.msgid.link/20260407181835.1053072-2-thorsten.blum@linux.dev
Signed-off-by: Petr Mladek <pmladek@suse.com>
2026-04-14 15:58:51 +02:00
Ziqing Chen
e0da8a8cac ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names()
snd_ctl_elem_init_enum_names() advances pointer p through the names
buffer while decrementing buf_len. If buf_len reaches zero but items
remain, the next iteration calls strnlen(p, 0).

While strnlen(p, 0) returns 0 and would hit the existing name_len == 0
error path, CONFIG_FORTIFY_SOURCE's fortified strnlen() first checks
maxlen against __builtin_dynamic_object_size(). When Clang loses track
of p's object size inside the loop, this triggers a BRK exception panic
before the return value is examined.

Add a buf_len == 0 guard at the loop entry to prevent calling fortified
strnlen() on an exhausted buffer.

Found by kernel fuzz testing through Xiaomi Smartphone.

Fixes: 8d448162bd ("ALSA: control: add support for ENUMERATED user space controls")
Cc: stable@vger.kernel.org
Signed-off-by: Ziqing Chen <chenziqing@xiaomi.com>
Link: https://patch.msgid.link/20260414132437.261304-1-chenziqing@xiaomi.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2026-04-14 15:31:10 +02:00
Lorenzo Bianconi
b9d8b85668 net: airoha: Add missing PPE configurations in airoha_ppe_hw_init()
Add the following PPE configuration in airoha_ppe_hw_init routine:
- 6RD hw offloading is currently not supported by Netfilter flowtable.
  Disable explicitly PPE 6RD offloading in order to prevent PPE to learn
  6RD flows and eventually interrupt the traffic.
- Add missing PPE bind rate configuration for L3 and L2 traffic.
  PPE bind rate configuration specifies the pps threshold to move a PPE
  entry state from UNBIND to BIND. Without this configuration this value
  is random.
- Set ageing thresholds to the values used in the vendor SDK in order to
  improve connection stability under load and avoid packet loss caused by
  fast aging.

Fixes: 00a7678310 ("net: airoha: Introduce flowtable offload support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20260412-airoha_ppe_hw_init-missing-bits-v1-1-06ac670819e3@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-04-14 15:16:29 +02:00
Johan Hovold
978df76153
MAINTAINERS: update second Socionext SPI maintainer address
The Linaro address is bouncing so switch to Jassi's gmail address also
found in MAINTAINERS.

Cc: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260410083423.504695-3-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2026-04-14 13:22:31 +01:00
Johan Hovold
9c53a0379e
MAINTAINERS: update Socionext SPI maintainer address
The Linaro address is bouncing so switch to Masahisa's Socionext address
also found in MAINTAINERS.

Acked-by: Masahisa Kojima <kojima.masahisa@socionext.com>
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://patch.msgid.link/20260410083423.504695-2-johan@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2026-04-14 13:22:30 +01:00
Krzysztof Kozlowski
ebeef57b7b
spi: dt-bindings: fsl: Correct GPIO flags in the example
IRQ_TYPE_xxx flags are not correct in the context of GPIO flags.
These are simple defines so they could be used in DTS but they will not
have the same meaning: IRQ_TYPE_EDGE_RISING = 1 = GPIO_ACTIVE_LOW.

Correct the example DTS to use proper flags for chip select GPIOs,
assuming the author of the code wanted similar logical behavior:

  IRQ_TYPE_EDGE_RISING => GPIO_ACTIVE_HIGH

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Link: https://patch.msgid.link/20260413085947.51047-2-krzysztof.kozlowski@oss.qualcomm.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2026-04-14 12:56:00 +01:00
Mark Brown
6e5b0fac10
ASoC: SOF: Intel: NVL/NVL-S: add platform name
Bard Liao <yung-chuan.liao@linux.intel.com> says:

The platform name will be used in the topology name.

Link: https://patch.msgid.link/20260413060800.3156425-1-yung-chuan.liao@linux.intel.com
2026-04-14 12:47:16 +01:00
Bard Liao
a158fe7b0c
ASoC: SOF: Intel: NVL-S: add platform name
The platform name will be used in the topology name.

Fixes: d3df422f66 ("ASoC: SOF: Intel: add initial support for NVL-S")
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://patch.msgid.link/20260413060800.3156425-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2026-04-14 12:47:14 +01:00
Bard Liao
ab463b4655
ASoC: SOF: Intel: NVL: add platform name
The platform name will be used in the topology name.

Fixes: 1800bcdc68 ("ASoC: SOF: Intel: add support for Nova Lake NVL")
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Link: https://patch.msgid.link/20260413060800.3156425-2-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2026-04-14 12:47:14 +01:00
Lorenzo Bianconi
1acdfbdb51 net: airoha: Fix VIP configuration for AN7583 SoC
EN7581 and AN7583 SoCs have different VIP definitions. Introduce
get_vip_port callback in airoha_eth_soc_data struct in order to take
into account EN7581 and AN7583 VIP register layout and definition
differences.
Introduce nbq parameter in airoha_gdm_port struct. At the moment nbq
is set statically to value previously used in airhoha_set_gdm2_loopback
routine and it will be read from device tree in subsequent patches.

Fixes: e4e5ce823b ("net: airoha: Add AN7583 SoC support")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260412-airoha-7583-vip-fix-v1-1-c35e02b054bb@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-04-14 13:26:23 +02:00
Zhengchuan Liang
f7cf8ece8c net: caif: clear client service pointer on teardown
`caif_connect()` can tear down an existing client after remote shutdown by
calling `caif_disconnect_client()` followed by `caif_free_client()`.
`caif_free_client()` releases the service layer referenced by
`adap_layer->dn`, but leaves that pointer stale.

When the socket is later destroyed, `caif_sock_destructor()` calls
`caif_free_client()` again and dereferences the freed service pointer.

Clear the client/service links before releasing the service object so
repeated teardown becomes harmless.

Fixes: 43e3692101 ("caif: Move refcount from service layer to sock and dev.")
Cc: stable@kernel.org
Reported-by: Yifan Wu <yifanwucs@gmail.com>
Reported-by: Juefei Pu <tomapufckgml@gmail.com>
Co-developed-by: Yuan Tan <yuantan098@gmail.com>
Signed-off-by: Yuan Tan <yuantan098@gmail.com>
Suggested-by: Xin Liu <bird@lzu.edu.cn>
Tested-by: Ren Wei <enjou1224z@gmail.com>
Signed-off-by: Zhengchuan Liang <zcliangcn@gmail.com>
Signed-off-by: Ren Wei <n05ec@lzu.edu.cn>
Link: https://patch.msgid.link/9f3d37847c0037568aae698ca23cd47c6691acb0.1775897577.git.zcliangcn@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2026-04-14 13:21:54 +02:00
Shuming Fan
cf162476f7
ASoC: rt1320: fix the warning 'rae_fw' from request_firmware() not released
New smatch warnings:
sound/soc/codecs/rt1320-sdw.c:1575 rt1320_rae_load() warn: 'rae_fw' from
request_firmware() not released on lines: 1575.

Fixes: 22937af75a ("ASoC: rt1320: support RAE parameters loading")
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <error27@gmail.com>
Closes: https://lore.kernel.org/r/202604111548.EL450PMb-lkp@intel.com/
Signed-off-by: Shuming Fan <shumingf@realtek.com>
Link: https://patch.msgid.link/20260414071441.1524039-1-shumingf@realtek.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2026-04-14 12:13:53 +01:00