Hi Zqiang, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on paulmck-rcu/dev] [also build test WARNING on next-20230209] [cannot apply to linus/master v6.2-rc7] [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/Zqiang/rcu-Keeping-rcu-related-kthreads-running-on-housekeeping-CPUS/20230209-182311 base: https://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu.git dev patch link: https://lore.kernel.org/r/20230209102730.974465-1-qiang1.zhang%40intel.com patch subject: [PATCH v2] rcu: Keeping rcu-related kthreads running on housekeeping CPUS config: riscv-randconfig-r016-20230209 (https://download.01.org/0day-ci/archive/20230209/202302092209.AYjmQ4Id-lkp@xxxxxxxxx/config) compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project db0e6591612b53910a1b366863348bdb9d7d2fb1) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://github.com/intel-lab-lkp/linux/commit/af15a3ade363b21d823918088623f8564cbd9d08 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Zqiang/rcu-Keeping-rcu-related-kthreads-running-on-housekeeping-CPUS/20230209-182311 git checkout af15a3ade363b21d823918088623f8564cbd9d08 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv olddefconfig COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash kernel/ If you fix the issue, kindly add following tag where applicable | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Link: https://lore.kernel.org/oe-kbuild-all/202302092209.AYjmQ4Id-lkp@xxxxxxxxx/ All warnings (new ones prefixed by >>): In file included from kernel/torture.c:40: >> kernel/rcu/rcu.h:509:6: warning: no previous prototype for function 'rcu_tasks_generic_setaffinity' [-Wmissing-prototypes] void rcu_tasks_generic_setaffinity(int cpu) {} ^ kernel/rcu/rcu.h:509:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void rcu_tasks_generic_setaffinity(int cpu) {} ^ static 1 warning generated. vim +/rcu_tasks_generic_setaffinity +509 kernel/rcu/rcu.h 484 485 #ifdef CONFIG_TINY_RCU 486 /* Tiny RCU doesn't expedite, as its purpose in life is instead to be tiny. */ 487 static inline bool rcu_gp_is_normal(void) { return true; } 488 static inline bool rcu_gp_is_expedited(void) { return false; } 489 static inline bool rcu_async_should_hurry(void) { return false; } 490 static inline void rcu_expedite_gp(void) { } 491 static inline void rcu_unexpedite_gp(void) { } 492 static inline void rcu_async_hurry(void) { } 493 static inline void rcu_async_relax(void) { } 494 static inline void rcu_request_urgent_qs_task(struct task_struct *t) { } 495 #else /* #ifdef CONFIG_TINY_RCU */ 496 bool rcu_gp_is_normal(void); /* Internal RCU use. */ 497 bool rcu_gp_is_expedited(void); /* Internal RCU use. */ 498 bool rcu_async_should_hurry(void); /* Internal RCU use. */ 499 void rcu_expedite_gp(void); 500 void rcu_unexpedite_gp(void); 501 void rcu_async_hurry(void); 502 void rcu_async_relax(void); 503 void rcupdate_announce_bootup_oddness(void); 504 #ifdef CONFIG_TASKS_RCU_GENERIC 505 void show_rcu_tasks_gp_kthreads(void); 506 void rcu_tasks_generic_setaffinity(int cpu); 507 #else /* #ifdef CONFIG_TASKS_RCU_GENERIC */ 508 static inline void show_rcu_tasks_gp_kthreads(void) {} > 509 void rcu_tasks_generic_setaffinity(int cpu) {} 510 #endif /* #else #ifdef CONFIG_TASKS_RCU_GENERIC */ 511 void rcu_request_urgent_qs_task(struct task_struct *t); 512 #endif /* #else #ifdef CONFIG_TINY_RCU */ 513 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests
