[PATCH 4/4] ubifs: Convert do_writepage() to take a folio

[kernel test robot]

Hi Matthew,

kernel test robot noticed the following build warnings:

[auto build test WARNING on rw-ubifs/next]
[also build test WARNING on linus/master v6.4-rc5 next-20230605]
[cannot apply to rw-ubifs/fixes]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Matthew-Wilcox-Oracle/ubifs-Convert-from-writepage-to-writepages/20230606-005309
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs.git next
patch link:    https://lore.kernel.org/r/20230605165029.2908304-5-willy%40infradead.org
patch subject: [PATCH 4/4] ubifs: Convert do_writepage() to take a folio
config: alpha-allyesconfig (https://download.01.org/0day-ci/archive/20230606/202306060302.sCFYZsJ5-lkp@intel.com/config)
compiler: alpha-linux-gcc (GCC) 12.3.0
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        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/4f6ac0962f61cc07c95177f78cf1f3b03e79d822
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Matthew-Wilcox-Oracle/ubifs-Convert-from-writepage-to-writepages/20230606-005309
        git checkout 4f6ac0962f61cc07c95177f78cf1f3b03e79d822
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=alpha olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=alpha SHELL=/bin/bash fs/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp at intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306060302.sCFYZsJ5-lkp@intel.com/

All warnings (new ones prefixed by >>):

   fs/ubifs/file.c: In function 'do_writepage':
>> fs/ubifs/file.c:905:22: warning: variable 'i' set but not used [-Wunused-but-set-variable]
     905 |         int err = 0, i, blen;
         |                      ^


vim +/i +905 fs/ubifs/file.c

1e51764a3c2ac0 Artem Bityutskiy        2008-07-14  902  
4f6ac0962f61cc Matthew Wilcox (Oracle  2023-06-05  903) static int do_writepage(struct folio *folio, size_t len)
1e51764a3c2ac0 Artem Bityutskiy        2008-07-14  904  {
1e51764a3c2ac0 Artem Bityutskiy        2008-07-14 @905  	int err = 0, i, blen;
1e51764a3c2ac0 Artem Bityutskiy        2008-07-14  906  	unsigned int block;
1e51764a3c2ac0 Artem Bityutskiy        2008-07-14  907  	void *addr;
4f6ac0962f61cc Matthew Wilcox (Oracle  2023-06-05  908) 	size_t offset = 0;
1e51764a3c2ac0 Artem Bityutskiy        2008-07-14  909  	union ubifs_key key;
4f6ac0962f61cc Matthew Wilcox (Oracle  2023-06-05  910) 	struct inode *inode = folio->mapping->host;
1e51764a3c2ac0 Artem Bityutskiy        2008-07-14  911  	struct ubifs_info *c = inode->i_sb->s_fs_info;
1e51764a3c2ac0 Artem Bityutskiy        2008-07-14  912  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki