Hi Chao,

I love your patch! Yet something to improve:

[auto build test ERROR on f2fs/dev-test]
[also build test ERROR on linux/master linus/master v5.14-rc2 next-20210716]
[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/Chao-Yu/f2fs-fix-wrong-inflight-page-stats-for-directIO/20210719-170844
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev-test
config: nios2-randconfig-r031-20210719 (attached as .config)
compiler: nios2-linux-gcc (GCC) 10.3.0
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/5fc42a72cb1e41b799ea659d710c091804fb648a
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Chao-Yu/f2fs-fix-wrong-inflight-page-stats-for-directIO/20210719-170844
        git checkout 5fc42a72cb1e41b799ea659d710c091804fb648a
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=nios2 SHELL=/bin/bash fs/

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

All errors (new ones prefixed by >>):

   fs/f2fs/data.c: In function 'f2fs_dio_submit_bio':
>> fs/f2fs/data.c:3523:16: error: 'blkcnt' undeclared (first use in this function); did you mean 'blkcg'?
    3523 |  dio->blkcnt = blkcnt;
         |                ^~~~~~
         |                blkcg
   fs/f2fs/data.c:3523:16: note: each undeclared identifier is reported only once for each function it appears in


vim +3523 fs/f2fs/data.c

  3508	
  3509	static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
  3510								loff_t file_offset)
  3511	{
  3512		struct f2fs_private_dio *dio;
  3513		bool write = (bio_op(bio) == REQ_OP_WRITE);
  3514	
  3515		dio = f2fs_kzalloc(F2FS_I_SB(inode),
  3516				sizeof(struct f2fs_private_dio), GFP_NOFS);
  3517		if (!dio)
  3518			goto out;
  3519	
  3520		dio->inode = inode;
  3521		dio->orig_end_io = bio->bi_end_io;
  3522		dio->orig_private = bio->bi_private;
> 3523		dio->blkcnt = blkcnt;
  3524		dio->write = write;
  3525	
  3526		bio->bi_end_io = f2fs_dio_end_io;
  3527		bio->bi_private = dio;
  3528	
  3529		inc_page_counts(F2FS_I_SB(inode),
  3530				write ? F2FS_DIO_WRITE : F2FS_DIO_READ, dio->blkcnt);
  3531	
  3532		submit_bio(bio);
  3533		return;
  3534	out:
  3535		bio->bi_status = BLK_STS_IOERR;
  3536		bio_endio(bio);
  3537	}
  3538	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org