linux-kernel - [jlayton:iversion 18/18] fs/ext4/file.c:276:71: warning: format specifies type 'ssize_t' (aka 'long') but the argument has type 'int'

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Message-ID: <202210072348.kwgFhnhW-lkp@intel.com>
Date:   Fri, 7 Oct 2022 23:30:22 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jeff Layton <jlayton@...nel.org>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: [jlayton:iversion 18/18] fs/ext4/file.c:276:71: warning: format
 specifies type 'ssize_t' (aka 'long') but the argument has type 'int'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git iversion
head:   8c967bcb92934a21384bde38df3eda9c854d76be
commit: 8c967bcb92934a21384bde38df3eda9c854d76be [18/18] ext4: update times after I/O in write codepaths
config: riscv-randconfig-r003-20221003
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
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
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git/commit/?id=8c967bcb92934a21384bde38df3eda9c854d76be
        git remote add jlayton https://git.kernel.org/pub/scm/linux/kernel/git/jlayton/linux.git
        git fetch --no-tags jlayton iversion
        git checkout 8c967bcb92934a21384bde38df3eda9c854d76be
        # 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=riscv SHELL=/bin/bash fs/ext4/

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

All warnings (new ones prefixed by >>):

>> fs/ext4/file.c:276:71: warning: format specifies type 'ssize_t' (aka 'long') but the argument has type 'int' [-Wformat]
                   pr_warn_once("ext4: failed to update i_version after write: %zd\n", ret);
                                                                               ~~~     ^~~
                                                                               %d
   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__);                           \
                           ~~~~    ^~~~~~~~~~~
   1 warning generated.


vim +276 fs/ext4/file.c

   269	
   270	static void ext4_update_iversion(struct file *file)
   271	{
   272		int ret;
   273	
   274		ret = file_update_iversion(file);
   275		if (ret)
 > 276			pr_warn_once("ext4: failed to update i_version after write: %zd\n", ret);
   277	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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