* Re: [PATCH v2 2/2] locking: mutex: Fix proxy-exec potentially deactivating tasks marked TASK_RUNNING
[not found] <20260430215103.2978955-3-jstultz@google.com>
@ 2026-05-04 22:30 ` kernel test robot
2026-05-12 18:19 ` kernel test robot
1 sibling, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-05-04 22:30 UTC (permalink / raw)
To: John Stultz, LKML
Cc: oe-kbuild-all, John Stultz, Vineeth Pillai, Sonam Sanju,
Sean Christopherson, Kunwu Chan, Tejun Heo, Joel Fernandes,
Qais Yousef, Ingo Molnar, Peter Zijlstra, Juri Lelli,
Vincent Guittot, Dietmar Eggemann, Valentin Schneider,
Steven Rostedt, Will Deacon, Waiman Long, Boqun Feng,
Paul E. McKenney, Metin Kaya, Xuewen Yan, K Prateek Nayak,
Thomas Gleixner, Daniel Lezcano, Suleiman Souhlal, kuyo chang,
hupu, kernel-team
Hi John,
kernel test robot noticed the following build warnings:
[auto build test WARNING on tip/sched/core]
[also build test WARNING on tip/master next-20260430]
[cannot apply to tip/locking/core tip/auto-latest linus/master v6.16-rc1]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/John-Stultz/sched-proxy-exec-Close-race-causing-workqueue-work-being-delayed/20260504-045026
base: tip/sched/core
patch link: https://lore.kernel.org/r/20260430215103.2978955-3-jstultz%40google.com
patch subject: [PATCH v2 2/2] locking: mutex: Fix proxy-exec potentially deactivating tasks marked TASK_RUNNING
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20260505/202605050032.Sh1SUziK-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260505/202605050032.Sh1SUziK-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/202605050032.Sh1SUziK-lkp@intel.com/
All warnings (new ones prefixed by >>):
In file included from arch/x86/kernel/asm-offsets.c:9:
In file included from include/linux/crypto.h:18:
In file included from include/linux/slab.h:17:
In file included from include/linux/gfp.h:7:
In file included from include/linux/mmzone.h:22:
In file included from include/linux/mm_types.h:11:
In file included from include/linux/rbtree.h:24:
In file included from include/linux/rcupdate.h:27:
>> include/linux/sched.h:2209:10: warning: expression which evaluates to zero treated as a null pointer constant of type 'struct mutex *' [-Wnon-literal-null-conversion]
2209 | return false;
| ^~~~~
1 warning generated.
--
>> clang diag: include/linux/sched.h:2209:10: warning: expression which evaluates to zero treated as a null pointer constant of type 'struct mutex *' [-Wnon-literal-null-conversion]
vim +2209 include/linux/sched.h
2205
2206 static inline struct mutex *task_is_blocked_on(struct task_struct *p)
2207 {
2208 if (!sched_proxy_exec())
> 2209 return false;
2210 return (struct mutex *)((unsigned long)p->blocked_on & PROXY_BLOCKED_LATCH);
2211 }
2212
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH v2 2/2] locking: mutex: Fix proxy-exec potentially deactivating tasks marked TASK_RUNNING
[not found] <20260430215103.2978955-3-jstultz@google.com>
2026-05-04 22:30 ` [PATCH v2 2/2] locking: mutex: Fix proxy-exec potentially deactivating tasks marked TASK_RUNNING kernel test robot
@ 2026-05-12 18:19 ` kernel test robot
1 sibling, 0 replies; 2+ messages in thread
From: kernel test robot @ 2026-05-12 18:19 UTC (permalink / raw)
To: John Stultz, LKML
Cc: llvm, oe-kbuild-all, John Stultz, Vineeth Pillai, Sonam Sanju,
Sean Christopherson, Kunwu Chan, Tejun Heo, Joel Fernandes,
Qais Yousef, Ingo Molnar, Peter Zijlstra, Juri Lelli,
Vincent Guittot, Dietmar Eggemann, Valentin Schneider,
Steven Rostedt, Will Deacon, Waiman Long, Boqun Feng,
Paul E. McKenney, Metin Kaya, Xuewen Yan, K Prateek Nayak,
Thomas Gleixner, Daniel Lezcano, Suleiman Souhlal, kuyo chang,
hupu, kernel-team
Hi John,
kernel test robot noticed the following build errors:
[auto build test ERROR on tip/sched/core]
[also build test ERROR on tip/locking/core tip/master next-20260508]
[cannot apply to tip/auto-latest linus/master v6.16-rc1]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/John-Stultz/sched-proxy-exec-Close-race-causing-workqueue-work-being-delayed/20260504-045026
base: tip/sched/core
patch link: https://lore.kernel.org/r/20260430215103.2978955-3-jstultz%40google.com
patch subject: [PATCH v2 2/2] locking: mutex: Fix proxy-exec potentially deactivating tasks marked TASK_RUNNING
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20260512/202605122052.5KWIaVj6-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260512/202605122052.5KWIaVj6-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/202605122052.5KWIaVj6-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from lib/test_bitops.c:10:
In file included from include/linux/module.h:13:
In file included from include/linux/stat.h:19:
In file included from include/linux/time.h:60:
In file included from include/linux/time32.h:13:
In file included from include/linux/timex.h:67:
In file included from arch/x86/include/asm/timex.h:6:
In file included from arch/x86/include/asm/tsc.h:11:
In file included from arch/x86/include/asm/msr.h:16:
In file included from include/linux/percpu.h:12:
>> include/linux/sched.h:2209:10: error: expression which evaluates to zero treated as a null pointer constant of type 'struct mutex *' [-Werror,-Wnon-literal-null-conversion]
2209 | return false;
| ^~~~~
1 error generated.
vim +2209 include/linux/sched.h
2205
2206 static inline struct mutex *task_is_blocked_on(struct task_struct *p)
2207 {
2208 if (!sched_proxy_exec())
> 2209 return false;
2210 return (struct mutex *)((unsigned long)p->blocked_on & PROXY_BLOCKED_LATCH);
2211 }
2212
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
^ permalink raw reply [flat|nested] 2+ messages in thread