Merge tag 'locking-urgent-2024-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Ingo Molnar:
"lockdep:
- Fix potential deadlock between lockdep and RCU

Merge tag 'locking-urgent-2024-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Ingo Molnar:
"lockdep:
- Fix potential deadlock between lockdep and RCU (Zhiguo Niu)
- Use str_plural() to address Coccinelle warning (Thorsten Blum)
- Add debuggability enhancement (Luis Claudio R. Goncalves)

static keys & calls:
- Fix static_key_slow_dec() yet again (Peter Zijlstra)
- Handle module init failure correctly in static_call_del_module()
(Thomas Gleixner)
- Replace pointless WARN_ON() in static_call_module_notify() (Thomas
Gleixner)

<linux/cleanup.h>:
- Add usage and style documentation (Dan Williams)

rwsems:
- Move is_rwsem_reader_owned() and rwsem_owner() under
CONFIG_DEBUG_RWSEMS (Waiman Long)

atomic ops, x86:
- Redeclare x86_32 arch_atomic64_{add,sub}() as void (Uros Bizjak)
- Introduce the read64_nonatomic macro to x86_32 with cx8 (Uros
Bizjak)"

Signed-off-by: Ingo Molnar <mingo@kernel.org>

* tag 'locking-urgent-2024-09-29' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/rwsem: Move is_rwsem_reader_owned() and rwsem_owner() under CONFIG_DEBUG_RWSEMS
jump_label: Fix static_key_slow_dec() yet again
static_call: Replace pointless WARN_ON() in static_call_module_notify()
static_call: Handle module init failure correctly in static_call_del_module()
locking/lockdep: Simplify character output in seq_line()
lockdep: fix deadlock issue between lockdep and rcu
lockdep: Use str_plural() to fix Coccinelle warning
cleanup: Add usage and style documentation
lockdep: suggest the fix for "lockdep bfs error:-1" on print_bfs_bug
locking/atomic/x86: Redeclare x86_32 arch_atomic64_{add,sub}() as void
locking/atomic/x86: Introduce the read64_nonatomic macro to x86_32 with cx8

show more ...

Merge branch 'locking/core' into locking/urgent, to pick up pending commits

Merge all pending locking commits into a single branch.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

locking/atomic/x86: Redeclare x86_32 arch_atomic64_{add,sub}() as void

Correct the return type of x86_32 arch_atomic64_add() and
arch_atomic64_sub() functions to 'void' and remove redundant return.

locking/atomic/x86: Redeclare x86_32 arch_atomic64_{add,sub}() as void

Correct the return type of x86_32 arch_atomic64_add() and
arch_atomic64_sub() functions to 'void' and remove redundant return.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20240605181424.3228-2-ubizjak@gmail.com

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Merge branch 'next' into for-linus

Prepare input updates for 6.12 merge window.

Merge tag 'v6.10' into next

Sync up with mainline to bring in device_for_each_child_node_scoped()
and other newer APIs.

Merge drm-misc-next-2024-07-04 into drm-misc-next-fixes

Let's start the drm-misc-next-fixes cycle.

Signed-off-by: Maxime Ripard <mripard@kernel.org>

Merge drm/drm-next into drm-intel-next

Sync to v6.10-rc3.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge drm/drm-next into drm-xe-next

Needed to get tracing cleanup and add mmio tracing series.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Merge remote-tracking branch 'drm-misc/drm-misc-next' into HEAD

Merge drm-misc-next tree into the msm-next tree in order to be able to
use HDMI connector framework for the MSM HDMI driver.

Merge drm/drm-next into drm-misc-next

Let's start the new release cycle.

Signed-off-by: Maxime Ripard <mripard@kernel.org>

Merge branch 'tip/x86/cpu'

The Lunarlake patches rely on the new VFM stuff.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>

Merge topic branches 'clkdev' and 'fixes' into for-linus

Merge remote-tracking branch 'drm/drm-fixes' into drm-misc-fixes

v6.10-rc1 is released, forward from v6.9

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Cross merge.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Merge tag 'x86-asm-2024-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 asm updates from Ingo Molnar:

- Clean up & fix asm() operand modifiers & constraints

- Misc clean

Merge tag 'x86-asm-2024-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 asm updates from Ingo Molnar:

- Clean up & fix asm() operand modifiers & constraints

- Misc cleanups

* tag 'x86-asm-2024-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/alternatives: Remove a superfluous newline in _static_cpu_has()
x86/asm/64: Clean up memset16(), memset32(), memset64() assembly constraints in <asm/string_64.h>
x86/asm: Use "m" operand constraint in WRUSSQ asm template
x86/asm: Use %a instead of %P operand modifier in asm templates
x86/asm: Use %c/%n instead of %P operand modifier in asm templates
x86/asm: Remove %P operand modifier from altinstr asm templates

show more ...

Merge tag 'locking-core-2024-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Ingo Molnar:

- Over a dozen code generation micro-optimizations for the atomi

Merge tag 'locking-core-2024-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull locking updates from Ingo Molnar:

- Over a dozen code generation micro-optimizations for the atomic
and spinlock code

- Add more __ro_after_init attributes

- Robustify the lockdevent_*() macros

* tag 'locking-core-2024-05-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
locking/pvqspinlock/x86: Use _Q_LOCKED_VAL in PV_UNLOCK_ASM macro
locking/qspinlock/x86: Micro-optimize virt_spin_lock()
locking/atomic/x86: Merge __arch{,_try}_cmpxchg64_emu_local() with __arch{,_try}_cmpxchg64_emu()
locking/atomic/x86: Introduce arch_try_cmpxchg64_local()
locking/pvqspinlock/x86: Remove redundant CMP after CMPXCHG in __raw_callee_save___pv_queued_spin_unlock()
locking/pvqspinlock: Use try_cmpxchg() in qspinlock_paravirt.h
locking/pvqspinlock: Use try_cmpxchg_acquire() in trylock_clear_pending()
locking/qspinlock: Use atomic_try_cmpxchg_relaxed() in xchg_tail()
locking/atomic/x86: Define arch_atomic_sub() family using arch_atomic_add() functions
locking/atomic/x86: Rewrite x86_32 arch_atomic64_{,fetch}_{and,or,xor}() functions
locking/atomic/x86: Introduce arch_atomic64_read_nonatomic() to x86_32
locking/atomic/x86: Introduce arch_atomic64_try_cmpxchg() to x86_32
locking/atomic/x86: Introduce arch_try_cmpxchg64() for !CONFIG_X86_CMPXCHG64
locking/atomic/x86: Modernize x86_32 arch_{,try_}_cmpxchg64{,_local}()
locking/atomic/x86: Correct the definition of __arch_try_cmpxchg128()
x86/tsc: Make __use_tsc __ro_after_init
x86/kvm: Make kvm_async_pf_enabled __ro_after_init
context_tracking: Make context_tracking_key __ro_after_init
jump_label,module: Don't alloc static_key_mod for __ro_after_init keys
locking/qspinlock: Always evaluate lockevent* non-event parameter once

show more ...

locking/atomic/x86: Rewrite x86_32 arch_atomic64_{,fetch}_{and,or,xor}() functions

Rewrite x86_32 arch_atomic64_{,fetch}_{and,or,xor}() functions to
use arch_atomic64_try_cmpxchg(). This implementa

locking/atomic/x86: Rewrite x86_32 arch_atomic64_{,fetch}_{and,or,xor}() functions

Rewrite x86_32 arch_atomic64_{,fetch}_{and,or,xor}() functions to
use arch_atomic64_try_cmpxchg(). This implementation avoids one extra
trip through the CMPXCHG loop.

The value preload before the cmpxchg loop does not need to be atomic.
Use arch_atomic64_read_nonatomic(v) to load the value from atomic_t
location in a non-atomic way.

The generated code improves from:

1917d5: 31 c9 xor %ecx,%ecx
1917d7: 31 db xor %ebx,%ebx
1917d9: 89 4c 24 3c mov %ecx,0x3c(%esp)
1917dd: 8b 74 24 24 mov 0x24(%esp),%esi
1917e1: 89 c8 mov %ecx,%eax
1917e3: 89 5c 24 34 mov %ebx,0x34(%esp)
1917e7: 8b 7c 24 28 mov 0x28(%esp),%edi
1917eb: 21 ce and %ecx,%esi
1917ed: 89 74 24 4c mov %esi,0x4c(%esp)
1917f1: 21 df and %ebx,%edi
1917f3: 89 de mov %ebx,%esi
1917f5: 89 7c 24 50 mov %edi,0x50(%esp)
1917f9: 8b 54 24 4c mov 0x4c(%esp),%edx
1917fd: 8b 7c 24 2c mov 0x2c(%esp),%edi
191801: 8b 4c 24 50 mov 0x50(%esp),%ecx
191805: 89 d3 mov %edx,%ebx
191807: 89 f2 mov %esi,%edx
191809: f0 0f c7 0f lock cmpxchg8b (%edi)
19180d: 89 c1 mov %eax,%ecx
19180f: 8b 74 24 34 mov 0x34(%esp),%esi
191813: 89 d3 mov %edx,%ebx
191815: 89 44 24 4c mov %eax,0x4c(%esp)
191819: 8b 44 24 3c mov 0x3c(%esp),%eax
19181d: 89 df mov %ebx,%edi
19181f: 89 54 24 44 mov %edx,0x44(%esp)
191823: 89 ca mov %ecx,%edx
191825: 31 de xor %ebx,%esi
191827: 31 c8 xor %ecx,%eax
191829: 09 f0 or %esi,%eax
19182b: 75 ac jne 1917d9 <...>

to:

1912ba: 8b 06 mov (%esi),%eax
1912bc: 8b 56 04 mov 0x4(%esi),%edx
1912bf: 89 44 24 3c mov %eax,0x3c(%esp)
1912c3: 89 c1 mov %eax,%ecx
1912c5: 23 4c 24 34 and 0x34(%esp),%ecx
1912c9: 89 d3 mov %edx,%ebx
1912cb: 23 5c 24 38 and 0x38(%esp),%ebx
1912cf: 89 54 24 40 mov %edx,0x40(%esp)
1912d3: 89 4c 24 2c mov %ecx,0x2c(%esp)
1912d7: 89 5c 24 30 mov %ebx,0x30(%esp)
1912db: 8b 5c 24 2c mov 0x2c(%esp),%ebx
1912df: 8b 4c 24 30 mov 0x30(%esp),%ecx
1912e3: f0 0f c7 0e lock cmpxchg8b (%esi)
1912e7: 0f 85 f3 02 00 00 jne 1915e0 <...>

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20240410062957.322614-3-ubizjak@gmail.com

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locking/atomic/x86: Introduce arch_atomic64_read_nonatomic() to x86_32

Introduce arch_atomic64_read_nonatomic() for 32-bit targets to load
the value from atomic64_t location in a non-atomic way. Thi

locking/atomic/x86: Introduce arch_atomic64_read_nonatomic() to x86_32

Introduce arch_atomic64_read_nonatomic() for 32-bit targets to load
the value from atomic64_t location in a non-atomic way. This
function is intended to be used in cases where a subsequent atomic
operation will handle the torn value, and can be used to prime the
first iteration of unconditional try_cmpxchg() loops.

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20240410062957.322614-2-ubizjak@gmail.com

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locking/atomic/x86: Introduce arch_atomic64_try_cmpxchg() to x86_32

Introduce arch_atomic64_try_cmpxchg() for 32-bit targets to use
optimized target specific implementation instead of a generic one.

locking/atomic/x86: Introduce arch_atomic64_try_cmpxchg() to x86_32

Introduce arch_atomic64_try_cmpxchg() for 32-bit targets to use
optimized target specific implementation instead of a generic one.
This implementation eliminates dual-word compare after
cmpxchg8b instruction and improves generated asm code from:

2273: f0 0f c7 0f lock cmpxchg8b (%edi)
2277: 8b 74 24 2c mov 0x2c(%esp),%esi
227b: 89 d3 mov %edx,%ebx
227d: 89 c2 mov %eax,%edx
227f: 89 5c 24 10 mov %ebx,0x10(%esp)
2283: 8b 7c 24 30 mov 0x30(%esp),%edi
2287: 89 44 24 1c mov %eax,0x1c(%esp)
228b: 31 f2 xor %esi,%edx
228d: 89 d0 mov %edx,%eax
228f: 89 da mov %ebx,%edx
2291: 31 fa xor %edi,%edx
2293: 09 d0 or %edx,%eax
2295: 0f 85 a5 00 00 00 jne 2340 <...>

to:

2270: f0 0f c7 0f lock cmpxchg8b (%edi)
2274: 0f 85 a6 00 00 00 jne 2320 <...>

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20240410062957.322614-1-ubizjak@gmail.com

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x86/asm: Use %c/%n instead of %P operand modifier in asm templates

The "P" asm operand modifier is a x86 target-specific modifier.

When used with a constant, the "P" modifier emits "cst" instead of

x86/asm: Use %c/%n instead of %P operand modifier in asm templates

The "P" asm operand modifier is a x86 target-specific modifier.

When used with a constant, the "P" modifier emits "cst" instead of
"$cst". This property is currently used to emit the bare constant
without all syntax-specific prefixes.

The generic "c" resp. "n" operand modifier should be used instead.

No functional changes intended.

Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lore.kernel.org/r/20240319104418.284519-3-ubizjak@gmail.com

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Merge branch 'next' into for-linus

Prepare input updates for 6.7 merge window.

Merge tag 'v6.5' into next

Sync up with mainline to bring in updates to the shared infrastructure.

Merge drm/drm-next into drm-intel-next

Catching-up with drm-next and drm-intel-gt-next.
It will unblock a code refactor around the platform
definitions (names vs acronyms).

Signed-off-by: Rodrigo V

Merge drm/drm-next into drm-intel-next

Catching-up with drm-next and drm-intel-gt-next.
It will unblock a code refactor around the platform
definitions (names vs acronyms).

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

show more ...

Merge drm/drm-next into drm-intel-gt-next

Need to pull in b3e4aae612ec ("drm/i915/hdcp: Modify hdcp_gsc_message msg sending mechanism") as
a dependency for https://patchwork.freedesktop.org/series/1

Merge drm/drm-next into drm-intel-gt-next

Need to pull in b3e4aae612ec ("drm/i915/hdcp: Modify hdcp_gsc_message msg sending mechanism") as
a dependency for https://patchwork.freedesktop.org/series/121735/

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

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Merge drm/drm-next into drm-misc-next

Backmerging to get v6.5-rc2.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>