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McKenney" , Metin Kaya , Xuewen Yan , K Prateek Nayak , Thomas Gleixner , Daniel Lezcano , Suleiman Souhlal , kuyo chang , hupu , kernel-team@android.com Subject: Re: [PATCH v2 2/2] locking: mutex: Fix proxy-exec potentially deactivating tasks marked TASK_RUNNING Message-ID: <202605050032.Sh1SUziK-lkp@intel.com> References: <20260430215103.2978955-3-jstultz@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260430215103.2978955-3-jstultz@google.com> 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 | 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