tree 4e65c171448f013eddcdad3075b06608f0fc24f9
parent 4a770891d9ddf94df985ca438e78d355b8469247
author Byongho Lee <bhlee.kernel@gmail.com> 1436501426 +0900
committer Chris Mason <clm@fb.com> 1439130867 -0700

Btrfs: remove unused mutex from struct 'btrfs_fs_info'

The code using 'ordered_extent_flush_mutex' mutex has removed by below
commit.
 - 8d875f95da43c6a8f18f77869f2ef26e9594fecc
   btrfs: disable strict file flushes for renames and truncates
But the mutex still lives in struct 'btrfs_fs_info'.

So, this patch removes the mutex from struct 'btrfs_fs_info' and its
initialization code.

Signed-off-by: Byongho Lee <bhlee.kernel@gmail.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>