From: "Paul E. McKenney" <paulmck@kernel.org>
To: kernel test robot <lkp@intel.com>
Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
Linux Memory Management List <linux-mm@kvack.org>
Subject: Re: [linux-next:master 2524/3504] kernel/locking/rtmutex.c:218:9: error: incompatible pointer to integer conversion passing 'typeof (*(((__ai_ptr))))' (aka 'struct task_struct *') to parameter of type 'uintptr_t' (aka 'unsigned long')
Date: Thu, 4 Apr 2024 10:44:48 -0700 [thread overview]
Message-ID: <302e5ce2-5a65-4e07-8ca8-cced83e9af5b@paulmck-laptop> (raw)
In-Reply-To: <202404040526.GVzaL2io-lkp@intel.com>
On Thu, Apr 04, 2024 at 05:13:20AM +0800, kernel test robot wrote:
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head: 727900b675b749c40ba1f6669c7ae5eb7eb8e837
> commit: df35ee400e06b23ecd44fdb66451a5343932f834 [2524/3504] riscv: Emulate one-byte and two-byte cmpxchg
> config: riscv-nommu_virt_defconfig (https://download.01.org/0day-ci/archive/20240404/202404040526.GVzaL2io-lkp@intel.com/config)
> compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 546dc2245ffc4cccd0b05b58b7a5955e355a3b27)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240404/202404040526.GVzaL2io-lkp@intel.com/reproduce)
>
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@intel.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202404040526.GVzaL2io-lkp@intel.com/
I believe that this is fixed by the following updated commit in -rcu:
27011e7159ef ("riscv: Emulate one-byte cmpxchg")
But please let me know if I am missing something.
Thanx, Paul
> All errors (new ones prefixed by >>):
>
> In file included from kernel/locking/rtmutex_api.c:9:
> >> kernel/locking/rtmutex.c:218:9: error: incompatible pointer to integer conversion passing 'typeof (*(((__ai_ptr))))' (aka 'struct task_struct *') to parameter of type 'uintptr_t' (aka 'unsigned long') [-Wint-conversion]
> 218 | return try_cmpxchg_acquire(&lock->owner, &old, new);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-instrumented.h:4889:2: note: expanded from macro 'try_cmpxchg_acquire'
> 4889 | raw_try_cmpxchg_acquire(__ai_ptr, __ai_oldp, __VA_ARGS__); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:210:9: note: expanded from macro 'raw_try_cmpxchg_acquire'
> 210 | ___r = raw_cmpxchg_acquire((_ptr), ___o, (_new)); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:65:29: note: expanded from macro 'raw_cmpxchg_acquire'
> 65 | #define raw_cmpxchg_acquire arch_cmpxchg_acquire
> | ^
> arch/riscv/include/asm/cmpxchg.h:264:23: note: expanded from macro 'arch_cmpxchg_acquire'
> 264 | (__typeof__(*(ptr))) __cmpxchg_acquire((ptr), \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 265 | _o_, _n_, sizeof(*(ptr))); \
> | ~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/riscv/include/asm/cmpxchg.h:225:48: note: expanded from macro '__cmpxchg_acquire'
> 225 | __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \
> | ^~~~~
> include/linux/cmpxchg-emu.h:13:52: note: passing argument to parameter 'old' here
> 13 | uintptr_t cmpxchg_emu_u8(volatile u8 *p, uintptr_t old, uintptr_t new);
> | ^
> In file included from kernel/locking/rtmutex_api.c:9:
> >> kernel/locking/rtmutex.c:218:9: error: incompatible pointer to integer conversion passing 'typeof (*(((__ai_ptr))))' (aka 'struct task_struct *') to parameter of type 'uintptr_t' (aka 'unsigned long') [-Wint-conversion]
> 218 | return try_cmpxchg_acquire(&lock->owner, &old, new);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-instrumented.h:4889:2: note: expanded from macro 'try_cmpxchg_acquire'
> 4889 | raw_try_cmpxchg_acquire(__ai_ptr, __ai_oldp, __VA_ARGS__); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:210:9: note: expanded from macro 'raw_try_cmpxchg_acquire'
> 210 | ___r = raw_cmpxchg_acquire((_ptr), ___o, (_new)); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:65:29: note: expanded from macro 'raw_cmpxchg_acquire'
> 65 | #define raw_cmpxchg_acquire arch_cmpxchg_acquire
> | ^
> arch/riscv/include/asm/cmpxchg.h:264:23: note: expanded from macro 'arch_cmpxchg_acquire'
> 264 | (__typeof__(*(ptr))) __cmpxchg_acquire((ptr), \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 265 | _o_, _n_, sizeof(*(ptr))); \
> | ~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/riscv/include/asm/cmpxchg.h:225:55: note: expanded from macro '__cmpxchg_acquire'
> 225 | __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \
> | ^~~~~
> include/linux/cmpxchg-emu.h:13:67: note: passing argument to parameter 'new' here
> 13 | uintptr_t cmpxchg_emu_u8(volatile u8 *p, uintptr_t old, uintptr_t new);
> | ^
> In file included from kernel/locking/rtmutex_api.c:9:
> >> kernel/locking/rtmutex.c:218:9: error: incompatible integer to pointer conversion assigning to 'typeof (*(((__ai_ptr))))' (aka 'struct task_struct *') from 'uintptr_t' (aka 'unsigned long') [-Wint-conversion]
> 218 | return try_cmpxchg_acquire(&lock->owner, &old, new);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-instrumented.h:4889:2: note: expanded from macro 'try_cmpxchg_acquire'
> 4889 | raw_try_cmpxchg_acquire(__ai_ptr, __ai_oldp, __VA_ARGS__); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:210:9: note: expanded from macro 'raw_try_cmpxchg_acquire'
> 210 | ___r = raw_cmpxchg_acquire((_ptr), ___o, (_new)); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:65:29: note: expanded from macro 'raw_cmpxchg_acquire'
> 65 | #define raw_cmpxchg_acquire arch_cmpxchg_acquire
> | ^
> arch/riscv/include/asm/cmpxchg.h:264:23: note: expanded from macro 'arch_cmpxchg_acquire'
> 264 | (__typeof__(*(ptr))) __cmpxchg_acquire((ptr), \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 265 | _o_, _n_, sizeof(*(ptr))); \
> | ~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/riscv/include/asm/cmpxchg.h:225:9: note: expanded from macro '__cmpxchg_acquire'
> 225 | __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \
> | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In file included from kernel/locking/rtmutex_api.c:9:
> >> kernel/locking/rtmutex.c:218:9: error: incompatible pointer to integer conversion passing 'typeof (*(((__ai_ptr))))' (aka 'struct task_struct *') to parameter of type 'uintptr_t' (aka 'unsigned long') [-Wint-conversion]
> 218 | return try_cmpxchg_acquire(&lock->owner, &old, new);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-instrumented.h:4889:2: note: expanded from macro 'try_cmpxchg_acquire'
> 4889 | raw_try_cmpxchg_acquire(__ai_ptr, __ai_oldp, __VA_ARGS__); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:210:9: note: expanded from macro 'raw_try_cmpxchg_acquire'
> 210 | ___r = raw_cmpxchg_acquire((_ptr), ___o, (_new)); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:65:29: note: expanded from macro 'raw_cmpxchg_acquire'
> 65 | #define raw_cmpxchg_acquire arch_cmpxchg_acquire
> | ^
> arch/riscv/include/asm/cmpxchg.h:264:23: note: expanded from macro 'arch_cmpxchg_acquire'
> 264 | (__typeof__(*(ptr))) __cmpxchg_acquire((ptr), \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 265 | _o_, _n_, sizeof(*(ptr))); \
> | ~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/riscv/include/asm/cmpxchg.h:229:50: note: expanded from macro '__cmpxchg_acquire'
> 229 | __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, __old, __new); \
> | ^~~~~
> include/linux/cmpxchg-emu.h:14:54: note: passing argument to parameter 'old' here
> 14 | uintptr_t cmpxchg_emu_u16(volatile u16 *p, uintptr_t old, uintptr_t new);
> | ^
> In file included from kernel/locking/rtmutex_api.c:9:
> >> kernel/locking/rtmutex.c:218:9: error: incompatible pointer to integer conversion passing 'typeof (*(((__ai_ptr))))' (aka 'struct task_struct *') to parameter of type 'uintptr_t' (aka 'unsigned long') [-Wint-conversion]
> 218 | return try_cmpxchg_acquire(&lock->owner, &old, new);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-instrumented.h:4889:2: note: expanded from macro 'try_cmpxchg_acquire'
> 4889 | raw_try_cmpxchg_acquire(__ai_ptr, __ai_oldp, __VA_ARGS__); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:210:9: note: expanded from macro 'raw_try_cmpxchg_acquire'
> 210 | ___r = raw_cmpxchg_acquire((_ptr), ___o, (_new)); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:65:29: note: expanded from macro 'raw_cmpxchg_acquire'
> 65 | #define raw_cmpxchg_acquire arch_cmpxchg_acquire
> | ^
> arch/riscv/include/asm/cmpxchg.h:264:23: note: expanded from macro 'arch_cmpxchg_acquire'
> 264 | (__typeof__(*(ptr))) __cmpxchg_acquire((ptr), \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 265 | _o_, _n_, sizeof(*(ptr))); \
> | ~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/riscv/include/asm/cmpxchg.h:229:57: note: expanded from macro '__cmpxchg_acquire'
> 229 | __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, __old, __new); \
> | ^~~~~
> include/linux/cmpxchg-emu.h:14:69: note: passing argument to parameter 'new' here
> 14 | uintptr_t cmpxchg_emu_u16(volatile u16 *p, uintptr_t old, uintptr_t new);
> | ^
> In file included from kernel/locking/rtmutex_api.c:9:
> >> kernel/locking/rtmutex.c:218:9: error: incompatible integer to pointer conversion assigning to 'typeof (*(((__ai_ptr))))' (aka 'struct task_struct *') from 'uintptr_t' (aka 'unsigned long') [-Wint-conversion]
> 218 | return try_cmpxchg_acquire(&lock->owner, &old, new);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-instrumented.h:4889:2: note: expanded from macro 'try_cmpxchg_acquire'
> 4889 | raw_try_cmpxchg_acquire(__ai_ptr, __ai_oldp, __VA_ARGS__); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:210:9: note: expanded from macro 'raw_try_cmpxchg_acquire'
> 210 | ___r = raw_cmpxchg_acquire((_ptr), ___o, (_new)); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:65:29: note: expanded from macro 'raw_cmpxchg_acquire'
> 65 | #define raw_cmpxchg_acquire arch_cmpxchg_acquire
> | ^
> arch/riscv/include/asm/cmpxchg.h:264:23: note: expanded from macro 'arch_cmpxchg_acquire'
> 264 | (__typeof__(*(ptr))) __cmpxchg_acquire((ptr), \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 265 | _o_, _n_, sizeof(*(ptr))); \
> | ~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/riscv/include/asm/cmpxchg.h:229:9: note: expanded from macro '__cmpxchg_acquire'
> 229 | __ret = cmpxchg_emu_u16((volatile u16 *)__ptr, __old, __new); \
> | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In file included from kernel/locking/rtmutex_api.c:9:
> kernel/locking/rtmutex.c:230:9: error: incompatible pointer to integer conversion passing 'typeof (*(((__ai_ptr))))' (aka 'struct task_struct *') to parameter of type 'uintptr_t' (aka 'unsigned long') [-Wint-conversion]
> 230 | return try_cmpxchg_release(&lock->owner, &old, new);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-instrumented.h:4899:2: note: expanded from macro 'try_cmpxchg_release'
> 4899 | raw_try_cmpxchg_release(__ai_ptr, __ai_oldp, __VA_ARGS__); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:228:9: note: expanded from macro 'raw_try_cmpxchg_release'
> 228 | ___r = raw_cmpxchg_release((_ptr), ___o, (_new)); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:77:29: note: expanded from macro 'raw_cmpxchg_release'
> 77 | #define raw_cmpxchg_release arch_cmpxchg_release
> | ^
> arch/riscv/include/asm/cmpxchg.h:316:23: note: expanded from macro 'arch_cmpxchg_release'
> 316 | (__typeof__(*(ptr))) __cmpxchg_release((ptr), \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 317 | _o_, _n_, sizeof(*(ptr))); \
> | ~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/riscv/include/asm/cmpxchg.h:277:48: note: expanded from macro '__cmpxchg_release'
> 277 | __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \
> | ^~~~~
> include/linux/cmpxchg-emu.h:13:52: note: passing argument to parameter 'old' here
> 13 | uintptr_t cmpxchg_emu_u8(volatile u8 *p, uintptr_t old, uintptr_t new);
> | ^
> In file included from kernel/locking/rtmutex_api.c:9:
> kernel/locking/rtmutex.c:230:9: error: incompatible pointer to integer conversion passing 'typeof (*(((__ai_ptr))))' (aka 'struct task_struct *') to parameter of type 'uintptr_t' (aka 'unsigned long') [-Wint-conversion]
> 230 | return try_cmpxchg_release(&lock->owner, &old, new);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-instrumented.h:4899:2: note: expanded from macro 'try_cmpxchg_release'
> 4899 | raw_try_cmpxchg_release(__ai_ptr, __ai_oldp, __VA_ARGS__); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:228:9: note: expanded from macro 'raw_try_cmpxchg_release'
> 228 | ___r = raw_cmpxchg_release((_ptr), ___o, (_new)); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:77:29: note: expanded from macro 'raw_cmpxchg_release'
> 77 | #define raw_cmpxchg_release arch_cmpxchg_release
> | ^
> arch/riscv/include/asm/cmpxchg.h:316:23: note: expanded from macro 'arch_cmpxchg_release'
> 316 | (__typeof__(*(ptr))) __cmpxchg_release((ptr), \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 317 | _o_, _n_, sizeof(*(ptr))); \
> | ~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/riscv/include/asm/cmpxchg.h:277:55: note: expanded from macro '__cmpxchg_release'
> 277 | __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \
> | ^~~~~
> include/linux/cmpxchg-emu.h:13:67: note: passing argument to parameter 'new' here
> 13 | uintptr_t cmpxchg_emu_u8(volatile u8 *p, uintptr_t old, uintptr_t new);
> | ^
> In file included from kernel/locking/rtmutex_api.c:9:
> kernel/locking/rtmutex.c:230:9: error: incompatible integer to pointer conversion assigning to 'typeof (*(((__ai_ptr))))' (aka 'struct task_struct *') from 'uintptr_t' (aka 'unsigned long') [-Wint-conversion]
> 230 | return try_cmpxchg_release(&lock->owner, &old, new);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-instrumented.h:4899:2: note: expanded from macro 'try_cmpxchg_release'
> 4899 | raw_try_cmpxchg_release(__ai_ptr, __ai_oldp, __VA_ARGS__); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:228:9: note: expanded from macro 'raw_try_cmpxchg_release'
> 228 | ___r = raw_cmpxchg_release((_ptr), ___o, (_new)); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:77:29: note: expanded from macro 'raw_cmpxchg_release'
> 77 | #define raw_cmpxchg_release arch_cmpxchg_release
> | ^
> arch/riscv/include/asm/cmpxchg.h:316:23: note: expanded from macro 'arch_cmpxchg_release'
> 316 | (__typeof__(*(ptr))) __cmpxchg_release((ptr), \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 317 | _o_, _n_, sizeof(*(ptr))); \
> | ~~~~~~~~~~~~~~~~~~~~~~~~~
> arch/riscv/include/asm/cmpxchg.h:277:9: note: expanded from macro '__cmpxchg_release'
> 277 | __ret = cmpxchg_emu_u8((volatile u8 *)__ptr, __old, __new); \
> | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> In file included from kernel/locking/rtmutex_api.c:9:
> kernel/locking/rtmutex.c:230:9: error: incompatible pointer to integer conversion passing 'typeof (*(((__ai_ptr))))' (aka 'struct task_struct *') to parameter of type 'uintptr_t' (aka 'unsigned long') [-Wint-conversion]
> 230 | return try_cmpxchg_release(&lock->owner, &old, new);
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-instrumented.h:4899:2: note: expanded from macro 'try_cmpxchg_release'
> 4899 | raw_try_cmpxchg_release(__ai_ptr, __ai_oldp, __VA_ARGS__); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:228:9: note: expanded from macro 'raw_try_cmpxchg_release'
> 228 | ___r = raw_cmpxchg_release((_ptr), ___o, (_new)); \
> | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> include/linux/atomic/atomic-arch-fallback.h:77:29: note: expanded from macro 'raw_cmpxchg_release'
> 77 | #define raw_cmpxchg_release arch_cmpxchg_release
>
>
> vim +218 kernel/locking/rtmutex.c
>
> 23f78d4a03c53c kernel/rtmutex.c Ingo Molnar 2006-06-27 208
> bd197234b0a616 kernel/rtmutex.c Thomas Gleixner 2007-06-17 209 /*
> cede88418b385b kernel/locking/rtmutex.c Sebastian Andrzej Siewior 2015-02-25 210 * We can speed up the acquire/release, if there's no debugging state to be
> cede88418b385b kernel/locking/rtmutex.c Sebastian Andrzej Siewior 2015-02-25 211 * set up.
> bd197234b0a616 kernel/rtmutex.c Thomas Gleixner 2007-06-17 212 */
> cede88418b385b kernel/locking/rtmutex.c Sebastian Andrzej Siewior 2015-02-25 213 #ifndef CONFIG_DEBUG_RT_MUTEXES
> 830e6acc8a1caf kernel/locking/rtmutex.c Peter Zijlstra 2021-08-15 214 static __always_inline bool rt_mutex_cmpxchg_acquire(struct rt_mutex_base *lock,
> 785159301bedea kernel/locking/rtmutex.c Sebastian Andrzej Siewior 2021-08-15 215 struct task_struct *old,
> 785159301bedea kernel/locking/rtmutex.c Sebastian Andrzej Siewior 2021-08-15 216 struct task_struct *new)
> 785159301bedea kernel/locking/rtmutex.c Sebastian Andrzej Siewior 2021-08-15 217 {
> 709e0b62869f62 kernel/locking/rtmutex.c Thomas Gleixner 2021-08-15 @218 return try_cmpxchg_acquire(&lock->owner, &old, new);
> 785159301bedea kernel/locking/rtmutex.c Sebastian Andrzej Siewior 2021-08-15 219 }
> 785159301bedea kernel/locking/rtmutex.c Sebastian Andrzej Siewior 2021-08-15 220
>
> :::::: The code at line 218 was first introduced by commit
> :::::: 709e0b62869f625afd18edd79f190c38cb39dfb2 locking/rtmutex: Switch to from cmpxchg_*() to try_cmpxchg_*()
>
> :::::: TO: Thomas Gleixner <tglx@linutronix.de>
> :::::: CC: Ingo Molnar <mingo@kernel.org>
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
next prev parent reply other threads:[~2024-04-04 17:44 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-03 21:13 kernel test robot
2024-04-04 17:44 ` Paul E. McKenney [this message]
2024-04-07 4:41 ` Liu, Yujie
2024-04-08 17:40 ` Paul E. McKenney
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=302e5ce2-5a65-4e07-8ca8-cced83e9af5b@paulmck-laptop \
--to=paulmck@kernel.org \
--cc=linux-mm@kvack.org \
--cc=lkp@intel.com \
--cc=llvm@lists.linux.dev \
--cc=oe-kbuild-all@lists.linux.dev \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox