tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git iversion
head:   dd6d62518f85963515225826455d92be6671f7d6
commit: dd6d62518f85963515225826455d92be6671f7d6 [17/17] ext4: update times after I/O in write codepaths
config: i386-randconfig-a002-20221003
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git/commit/?id=dd6d62518f85963515225826455d92be6671f7d6
        git remote add jlayton https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git
        git fetch --no-tags jlayton iversion
        git checkout dd6d62518f85963515225826455d92be6671f7d6
        # 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=i386 SHELL=/bin/bash fs/ext4/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> fs/ext4/file.c:290:72: warning: format specifies type 'long' but the argument has type 'ssize_t' (aka 'int') [-Wformat]
                           pr_warn_once("ext4: failed to update i_version after write: %ld\n", ret2);
                                                                                       ~~~     ^~~~
                                                                                       %zd
   include/linux/printk.h:622:42: note: expanded from macro 'pr_warn_once'
           printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
                                           ~~~     ^~~~~~~~~~~
   include/linux/printk.h:603:30: note: expanded from macro 'printk_once'
           DO_ONCE_LITE(printk, fmt, ##__VA_ARGS__)
                                ~~~    ^~~~~~~~~~~
   include/linux/once_lite.h:11:32: note: expanded from macro 'DO_ONCE_LITE'
           DO_ONCE_LITE_IF(true, func, ##__VA_ARGS__)
                                         ^~~~~~~~~~~
   include/linux/once_lite.h:31:9: note: expanded from macro 'DO_ONCE_LITE_IF'
                           func(__VA_ARGS__);                              \
                                ^~~~~~~~~~~
   include/linux/printk.h:464:60: note: expanded from macro 'printk'
   #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
                                                       ~~~    ^~~~~~~~~~~
   include/linux/printk.h:436:19: note: expanded from macro 'printk_index_wrap'
                   _p_func(_fmt, ##__VA_ARGS__);                           \
                           ~~~~    ^~~~~~~~~~~
   fs/ext4/file.c:597:72: warning: format specifies type 'long' but the argument has type 'ssize_t' (aka 'int') [-Wformat]
                           pr_warn_once("ext4: failed to update i_version after write: %ld\n", ret2);
                                                                                       ~~~     ^~~~
                                                                                       %zd
   include/linux/printk.h:622:42: note: expanded from macro 'pr_warn_once'
           printk_once(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
                                           ~~~     ^~~~~~~~~~~
   include/linux/printk.h:603:30: note: expanded from macro 'printk_once'
           DO_ONCE_LITE(printk, fmt, ##__VA_ARGS__)
                                ~~~    ^~~~~~~~~~~
   include/linux/once_lite.h:11:32: note: expanded from macro 'DO_ONCE_LITE'
           DO_ONCE_LITE_IF(true, func, ##__VA_ARGS__)
                                         ^~~~~~~~~~~
   include/linux/once_lite.h:31:9: note: expanded from macro 'DO_ONCE_LITE_IF'
                           func(__VA_ARGS__);                              \
                                ^~~~~~~~~~~
   include/linux/printk.h:464:60: note: expanded from macro 'printk'
   #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
                                                       ~~~    ^~~~~~~~~~~
   include/linux/printk.h:436:19: note: expanded from macro 'printk_index_wrap'
                   _p_func(_fmt, ##__VA_ARGS__);                           \
                           ~~~~    ^~~~~~~~~~~
   2 warnings generated.


vim +290 fs/ext4/file.c

   269	
   270	static ssize_t ext4_buffered_write_iter(struct kiocb *iocb,
   271						struct iov_iter *from)
   272	{
   273		ssize_t ret;
   274		struct inode *inode = file_inode(iocb->ki_filp);
   275	
   276		if (iocb->ki_flags & IOCB_NOWAIT)
   277			return -EOPNOTSUPP;
   278	
   279		inode_lock(inode);
   280		ret = ext4_write_checks(iocb, from);
   281		if (ret <= 0)
   282			goto out;
   283	
   284		current->backing_dev_info = inode_to_bdi(inode);
   285		ret = generic_perform_write(iocb, from);
   286		current->backing_dev_info = NULL;
   287		if (ret > 0) {
   288			ssize_t ret2 = file_update_iversion(iocb->ki_filp);
   289			if (ret2)
 > 290				pr_warn_once("ext4: failed to update i_version after write: %ld\n", ret2);
   291		}
   292	out:
   293		inode_unlock(inode);
   294		if (likely(ret > 0)) {
   295			iocb->ki_pos += ret;
   296			ret = generic_write_sync(iocb, ret);
   297		}
   298	
   299		return ret;
   300	}
   301	

-- 
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