Re: [PATCH v3] f2fs: dax: implement direct access

[kbuild test robot]

Hi Qiuyang,

[auto build test WARNING on f2fs/dev]
[also build test WARNING on v4.12-rc4 next-20170607]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/sunqiuyang/f2fs-dax-implement-direct-access/20170608-140734
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git dev
config: i386-randconfig-x070-06040719 (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   In file included from include/linux/linkage.h:4:0,
                    from include/linux/fs.h:4,
                    from fs/f2fs/gc.c:11:
   fs/f2fs/gc.c: In function 'dax_move_data_page':
   fs/f2fs/gc.c:731:40: error: 'struct f2fs_inode_info' has no member named 'i_mmap_sem'; did you mean 'i_sem'?
     if (!down_write_trylock(&F2FS_I(inode)->i_mmap_sem))
                                           ^
   include/linux/compiler.h:160:30: note: in definition of macro '__trace_if'
     if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
                                 ^~~~
>> fs/f2fs/gc.c:731:2: note: in expansion of macro 'if'
     if (!down_write_trylock(&F2FS_I(inode)->i_mmap_sem))
     ^~
   fs/f2fs/gc.c:731:40: error: 'struct f2fs_inode_info' has no member named 'i_mmap_sem'; did you mean 'i_sem'?
     if (!down_write_trylock(&F2FS_I(inode)->i_mmap_sem))
                                           ^
   include/linux/compiler.h:160:42: note: in definition of macro '__trace_if'
     if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
                                             ^~~~
>> fs/f2fs/gc.c:731:2: note: in expansion of macro 'if'
     if (!down_write_trylock(&F2FS_I(inode)->i_mmap_sem))
     ^~
   fs/f2fs/gc.c:731:40: error: 'struct f2fs_inode_info' has no member named 'i_mmap_sem'; did you mean 'i_sem'?
     if (!down_write_trylock(&F2FS_I(inode)->i_mmap_sem))
                                           ^
   include/linux/compiler.h:171:16: note: in definition of macro '__trace_if'
      ______r = !!(cond);     \
                   ^~~~
>> fs/f2fs/gc.c:731:2: note: in expansion of macro 'if'
     if (!down_write_trylock(&F2FS_I(inode)->i_mmap_sem))
     ^~
   fs/f2fs/gc.c:783:25: error: 'struct f2fs_inode_info' has no member named 'i_mmap_sem'; did you mean 'i_sem'?
     up_write(&F2FS_I(inode)->i_mmap_sem);
                            ^~

vim +/if +731 fs/f2fs/gc.c

   715		long map_len;
   716		pgoff_t pgoff;
   717		void *kaddr_old, *kaddr_new;
   718		pfn_t pfn;
   719	
   720		if (blk_queue_dax(bdev->bd_queue))
   721			dax_dev = dax_get_by_host(bdev->bd_disk->disk_name);
   722		else
   723			return;
   724	
   725		if (!check_valid_map(sbi, segno, off))
   726			return;
   727	
   728		if (f2fs_is_atomic_file(inode))
   729			return;
   730	
 > 731		if (!down_write_trylock(&F2FS_I(inode)->i_mmap_sem))
   732			return;
   733	
   734		unmap_mapping_range(inode->i_mapping, (loff_t)bidx << PAGE_SHIFT,
   735				PAGE_SIZE, 1);
   736		/* find the old block address */
   737		set_new_dnode(&dn, inode, NULL, NULL, 0);
   738		err = get_dnode_of_data(&dn, bidx, LOOKUP_NODE);
   739		if (err)

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