Hi Muneendra, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on scsi/for-next] [also build test ERROR on mkp-scsi/for-next cgroup/for-next v5.9 next-20201016] [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/0day-ci/linux/commits/Muneendra/blkcg-Support-to-track... base: https://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git for-next config: h8300-randconfig-r026-20201019 (attached as .config) compiler: h8300-linux-gcc (GCC) 9.3.0 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/0day-ci/linux/commit/59922d2173fdbcd3bf8c22d8ae58bf8b8... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Muneendra/blkcg-Support-to-track-FC-storage-blk-io-traffic/20201019-223933 git checkout 59922d2173fdbcd3bf8c22d8ae58bf8b82e8d39e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=h8300 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/nvme/host/fc.c: In function 'fc_update_appid': 3824 | ret = blkcg_set_app_identifier(app_id, cgrp_id, sizeof(app_id)); | ^~~~~~~~~~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/blkcg_set_app_identifier +3824 drivers/nvme/host/fc.c 3793 3794 /* 3795 * fc_update_appid :parses and updates the appid in the blkcg associated with 3796 * cgroupid. 3797 * @buf: buf contains both cgrpid and appid info 3798 * @count: size of the buffer 3799 */ 3800 static int fc_update_appid(const char *buf, size_t count) 3801 { 3802 u64 cgrp_id; 3803 int appid_len = 0; 3804 int cgrpid_len = 0; 3805 char app_id[APPID_LEN]; 3806 int ret = 0; 3807 3808 if (buf[count-1] == '\n') 3809 count--; 3810 3811 if ((count > (16+1+APPID_LEN)) || (!strchr(buf, ':'))) 3812 return -EINVAL; 3813 3814 cgrpid_len = fc_parse_cgrpid(buf, &cgrp_id); 3815 if (cgrpid_len < 0) 3816 return -EINVAL; 3817 /*appid len is count - cgrpid_len -1 (: + \n) */ 3818 appid_len = count - cgrpid_len - 1; 3819 if (appid_len > APPID_LEN) 3820 return -EINVAL; 3821 3822 memset(app_id, 0x0, sizeof(app_id)); 3823 memcpy(app_id, &buf[cgrpid_len+1], appid_len); 3825 if (ret < 0) 3826 return ret; 3827 return count; 3828 } 3829 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org