btrfs: use the assigned fs_devices instead of the dereference

We have assigned the %fs_info->fs_devices in %fs_devices as its not
modified just use it for the mutex_lock().

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2018-07-16 22:58:09 +08:00 • committed by David Sterba
commit 321a4bf72b