btrfs: qgroup: Cleanup open-coded old/new_refcnt update and read.

Use inline functions to do such things, to improve readability.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Acked-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Qu Wenruo 2015-03-12 16:10:13 +08:00 • committed by Chris Mason
commit 9c542136fd