[kbuild-all] Re: [PATCH] ext4: use min() to make code cleaner

Hi, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on tytso-ext4/dev] [also build test WARNING on v5.16-rc5 next-20211217] [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/cgel-zte-gmail-com/ext4-use-min-... base: https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev config: arc-randconfig-s032-20211218 (https://download.01.org/0day-ci/archive/20211219/202112190602.FX1i96n9-lk...) compiler: arc-elf-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://github.com/0day-ci/linux/commit/ff519f2d7d41c154cb0d31a9aebe16ce1... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review cgel-zte-gmail-com/ext4-use-min-to-make-code-cleaner/20211216-171213 git checkout ff519f2d7d41c154cb0d31a9aebe16ce1f6af7ed # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arc SHELL=/bin/bash drivers/iio/accel/ fs/ext4/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) fs/ext4/super.c:2643:46: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const *objp @@ got char [noderef] __rcu * @@ fs/ext4/super.c:2643:46: sparse: expected void const *objp fs/ext4/super.c:2643:46: sparse: got char [noderef] __rcu * fs/ext4/super.c:2698:51: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected char const *cs @@ got char [noderef] __rcu * @@ fs/ext4/super.c:2698:51: sparse: expected char const *cs fs/ext4/super.c:2698:51: sparse: got char [noderef] __rcu * fs/ext4/super.c:993:6: sparse: sparse: context imbalance in '__ext4_grp_locked_error' - different lock contexts for basic block fs/ext4/super.c:3321:9: sparse: sparse: context imbalance in 'ext4_check_descriptors' - different lock contexts for basic block vim +6926 fs/ext4/super.c 6904 6905 /* Read data from quotafile - avoid pagecache and such because we cannot afford 6906 * acquiring the locks... As quota files are never truncated and quota code 6907 * itself serializes the operations (and no one else should touch the files) 6908 * we don't have to be afraid of races */ 6909 static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 6910 size_t len, loff_t off) 6911 { 6912 struct inode *inode = sb_dqopt(sb)->files[type]; 6913 ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 6914 int offset = off & (sb->s_blocksize - 1); 6915 int tocopy; 6916 size_t toread; 6917 struct buffer_head *bh; 6918 loff_t i_size = i_size_read(inode); 6919 6920 if (off > i_size) 6921 return 0; 6922 if (off+len > i_size) 6923 len = i_size-off; 6924 toread = len; 6925 while (toread > 0) { 6927 bh = ext4_bread(NULL, inode, blk, 0); 6928 if (IS_ERR(bh)) 6929 return PTR_ERR(bh); 6930 if (!bh) /* A hole? */ 6931 memset(data, 0, tocopy); 6932 else 6933 memcpy(data, bh->b_data+offset, tocopy); 6934 brelse(bh); 6935 offset = 0; 6936 toread -= tocopy; 6937 data += tocopy; 6938 blk++; 6939 } 6940 return len; 6941 } 6942 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org