Hi Zhihao, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.18 next-20220601] [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] url: https://github.com/intel-lab-lkp/linux/commits/Zhihao-Cheng/proc-Fix-a-dentry-lock-race-between-release_task-and-lookup/20220601-102513 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 700170bf6b4d773e328fa54ebb70ba444007c702 config: x86_64-randconfig-a005 (https://download.01.org/0day-ci/archive/20220601/202206011314.dh4oSNjS-lkp@xxxxxxxxx/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project c825abd6b0198fb088d9752f556a70705bc99dfd) 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 # https://github.com/intel-lab-lkp/linux/commit/9dfec748ded82f145043dc08a944e1a9af7a640d git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Zhihao-Cheng/proc-Fix-a-dentry-lock-race-between-release_task-and-lookup/20220601-102513 git checkout 9dfec748ded82f145043dc08a944e1a9af7a640d # 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=x86_64 SHELL=/bin/bash fs/proc/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): >> fs/proc/base.c:1929:15: warning: no previous prototype for function 'proc_pid_make_base_inode' [-Wmissing-prototypes] struct inode *proc_pid_make_base_inode(struct super_block *sb, ^ fs/proc/base.c:1929:1: note: declare 'static' if the function is not intended to be used outside of this translation unit struct inode *proc_pid_make_base_inode(struct super_block *sb, ^ static 1 warning generated. vim +/proc_pid_make_base_inode +1929 fs/proc/base.c 1928 > 1929 struct inode *proc_pid_make_base_inode(struct super_block *sb, 1930 struct task_struct *task, umode_t mode) 1931 { 1932 struct inode *inode; 1933 struct proc_inode *ei; 1934 struct pid *pid; 1935 1936 inode = proc_pid_make_inode(sb, task, mode); 1937 if (!inode) 1938 return NULL; 1939 1940 /* Let proc_flush_pid find this directory inode */ 1941 ei = PROC_I(inode); 1942 pid = ei->pid; 1943 spin_lock(&pid->lock); 1944 hlist_add_head_rcu(&ei->sibling_inodes, &pid->inodes); 1945 spin_unlock(&pid->lock); 1946 1947 return inode; 1948 } 1949 -- 0-DAY CI Kernel Test Service https://01.org/lkp
