From cef37d3ae1c1847b553e22160fe33f2892bd39d4 Mon Sep 17 00:00:00 2001
From: Liu Bo <bo.li.liu@oracle.com>
Date: Wed, 28 Nov 2012 10:43:11 +0000
Subject: [PATCH] Btrfs: skip adding an acl attribute if we don't have to

commit 755ac67f83e515af55adbfe55134eb7d90839cdb upstream.

If the acl can be exactly represented in the traditional file
mode permission bits, we don't set another acl attribute.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 fs/btrfs/acl.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index 89b156d85d63..a1f6a1be8e3e 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -121,6 +121,8 @@ static int btrfs_set_acl(struct btrfs_trans_handle *trans,
 			ret = posix_acl_equiv_mode(acl, &inode->i_mode);
 			if (ret < 0)
 				return ret;
+			if (ret == 0)
+				acl = NULL;
 		}
 		ret = 0;
 		break;
-- 
2.39.2