Hi Junwen, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on hnaz-mm/master] [also build test WARNING on kees/for-next/pstore linus/master linux/master v5.18-rc3 next-20220422] [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/Junwen-Wu/proc-limit-schedstate-node-write-operation/20220423-103457 base: https://github.com/hnaz/linux-mm master config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20220423/202204231250.LYIILAXn-lkp@xxxxxxxxx/config) compiler: alpha-linux-gcc (GCC) 11.2.0 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/e7bc039b7c0aa4e9a5bb3ae2340769a451f795db git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Junwen-Wu/proc-limit-schedstate-node-write-operation/20220423-103457 git checkout e7bc039b7c0aa4e9a5bb3ae2340769a451f795db # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross W=1 O=build_dir ARCH=alpha SHELL=/bin/bash fs/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): fs/proc/base.c: In function 'sched_write': >> fs/proc/base.c:1468:13: warning: 'strcmp' of a string of length 5 and an array of size 5 evaluates to nonzero [-Wstring-compare] 1468 | if (strcmp(ubuf, "reset") == 0) { | ^~~~~~~~~~~~~~~~~~~~~ vim +/strcmp +1468 fs/proc/base.c 1454 1455 static ssize_t 1456 sched_write(struct file *file, const char __user *buf, 1457 size_t count, loff_t *offset) 1458 { 1459 struct inode *inode = file_inode(file); 1460 struct task_struct *p; 1461 char ubuf[5]; 1462 1463 memset(ubuf, 0, sizeof(ubuf)); 1464 if (count > 5) 1465 count = 0; 1466 if (copy_from_user(ubuf, buf, count)) 1467 return -EFAULT; > 1468 if (strcmp(ubuf, "reset") == 0) { 1469 p = get_proc_task(inode); 1470 if (!p) 1471 return -ESRCH; 1472 proc_sched_set_task(p); 1473 1474 put_task_struct(p); 1475 } 1476 1477 return count; 1478 } 1479 -- 0-DAY CI Kernel Test Service https://01.org/lkp
