Hi Liu,

[auto build test WARNING on btrfs/next]
[also build test WARNING on v4.4-rc3 next-20151203]

url:    
https://github.com/0day-ci/linux/commits/Liu-Bo/Btrfs-disable-online-scrub-repair-on-ro-cases/20151204-205115
base:   https://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs.git 
next
config: i386-randconfig-c0-12042053 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   In file included from include/uapi/linux/stddef.h:1:0,
                    from include/linux/stddef.h:4,
                    from include/uapi/linux/posix_types.h:4,
                    from include/uapi/linux/types.h:13,
                    from include/linux/types.h:5,
                    from include/uapi/linux/capability.h:16,
                    from include/linux/capability.h:15,
                    from include/linux/sched.h:15,
                    from include/linux/blkdev.h:4,
                    from fs/btrfs/scrub.c:19:
   fs/btrfs/scrub.c: In function 'scrub_fixup_readpage':
   fs/btrfs/scrub.c:703:10: error: invalid type argument of '->' (have 'u64 
{aka long long unsigned int}')
     if (root->fs_info->sb->s_flags & MS_RDONLY)
             ^
   include/linux/compiler.h:147:28: note: in definition of macro '__trace_if'
     if (__builtin_constant_p((cond)) ? !!(cond) :   \
                               ^
>> fs/btrfs/scrub.c:703:2: note: in expansion of macro 'if'
     if (root->fs_info->sb->s_flags & MS_RDONLY)
     ^
   fs/btrfs/scrub.c:703:10: error: invalid type argument of '->' (have 'u64 
{aka long long unsigned int}')
     if (root->fs_info->sb->s_flags & MS_RDONLY)
             ^
   include/linux/compiler.h:147:40: note: in definition of macro '__trace_if'
     if (__builtin_constant_p((cond)) ? !!(cond) :   \
                                           ^
>> fs/btrfs/scrub.c:703:2: note: in expansion of macro 'if'
     if (root->fs_info->sb->s_flags & MS_RDONLY)
     ^
   fs/btrfs/scrub.c:703:10: error: invalid type argument of '->' (have 'u64 
{aka long long unsigned int}')
     if (root->fs_info->sb->s_flags & MS_RDONLY)
             ^
   include/linux/compiler.h:158:16: note: in definition of macro '__trace_if'
      ______r = !!(cond);     \
                   ^
>> fs/btrfs/scrub.c:703:2: note: in expansion of macro 'if'
     if (root->fs_info->sb->s_flags & MS_RDONLY)
     ^

vim +/if +703 fs/btrfs/scrub.c

   687  }
   688  
   689  static int scrub_fixup_readpage(u64 inum, u64 offset, u64 root, void 
*fixup_ctx)
   690  {
   691          struct page *page = NULL;
   692          unsigned long index;
   693          struct scrub_fixup_nodatasum *fixup = fixup_ctx;
   694          int ret;
   695          int corrected = 0;
   696          struct btrfs_key key;
   697          struct inode *inode = NULL;
   698          struct btrfs_fs_info *fs_info;
   699          u64 end = offset + PAGE_SIZE - 1;
   700          struct btrfs_root *local_root;
   701          int srcu_index;
   702  
 > 703          if (root->fs_info->sb->s_flags & MS_RDONLY)
   704                  return -EROFS;
   705  
   706          key.objectid = root;
   707          key.type = BTRFS_ROOT_ITEM_KEY;
   708          key.offset = (u64)-1;
   709  
   710          fs_info = fixup->root->fs_info;
   711          srcu_index = srcu_read_lock(&fs_info->subvol_srcu);

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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