Hi Masami, kernel test robot noticed the following build warnings: [auto build test WARNING on linus/master] [also build test WARNING on v6.7-rc2 next-20231124] [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/Masami-Hiramatsu-Google/rethook-Use-__rcu-pointer-for-rethook-handler/20231124-090634 base: linus/master patch link: https://lore.kernel.org/r/170078778632.209874.7893551840863388753.stgit%40devnote2 patch subject: [PATCH] rethook: Use __rcu pointer for rethook::handler config: x86_64-randconfig-r113-20231124 (https://download.01.org/0day-ci/archive/20231124/202311241808.rv9ceuAh-lkp@xxxxxxxxx/config) compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231124/202311241808.rv9ceuAh-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202311241808.rv9ceuAh-lkp@xxxxxxxxx/ sparse warnings: (new ones prefixed by >>) >> kernel/trace/rethook.c:51:9: sparse: sparse: incompatible types in comparison expression (different address spaces): >> kernel/trace/rethook.c:51:9: sparse: void ( [noderef] __rcu * )( ... ) >> kernel/trace/rethook.c:51:9: sparse: void ( * )( ... ) kernel/trace/rethook.c:66:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/trace/rethook.c:66:9: sparse: void ( [noderef] __rcu * )( ... ) kernel/trace/rethook.c:66:9: sparse: void ( * )( ... ) kernel/trace/rethook.c:110:9: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/trace/rethook.c:110:9: sparse: void ( [noderef] __rcu * )( ... ) kernel/trace/rethook.c:110:9: sparse: void ( * )( ... ) kernel/trace/rethook.c:140:19: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/trace/rethook.c:140:19: sparse: void ( [noderef] __rcu * )( ... ) kernel/trace/rethook.c:140:19: sparse: void ( * )( ... ) kernel/trace/rethook.c:161:19: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/trace/rethook.c:161:19: sparse: void ( [noderef] __rcu * )( ... ) kernel/trace/rethook.c:161:19: sparse: void ( * )( ... ) kernel/trace/rethook.c:305:27: sparse: sparse: incompatible types in comparison expression (different address spaces): kernel/trace/rethook.c:305:27: sparse: void ( [noderef] __rcu * )( ... ) kernel/trace/rethook.c:305:27: sparse: void ( * )( ... ) vim +51 kernel/trace/rethook.c 40 41 /** 42 * rethook_stop() - Stop using a rethook. 43 * @rh: the struct rethook to stop. 44 * 45 * Stop using a rethook to prepare for freeing it. If you want to wait for 46 * all running rethook handler before calling rethook_free(), you need to 47 * call this first and wait RCU, and call rethook_free(). 48 */ 49 void rethook_stop(struct rethook *rh) 50 { > 51 rcu_assign_pointer(rh->handler, NULL); 52 } 53 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
