From: Dave Jones <dsj@fb.com>
Date: Thu, 28 Jan 2016 20:28:35 +0000 (-0500)
Subject: btrfs: remove open-coded swap() in backref.c:__merge_refs
X-Git-Tag: v4.6-rc2~13^2~17^2~2^2~5
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8f682f6955b94ddfb548a1db23c1dd633d90f7de;p=platform%2Fkernel%2Flinux-exynos.git

btrfs: remove open-coded swap() in backref.c:__merge_refs

The kernel provides a swap() that does the same thing as this code.

Signed-off-by: Dave Jones <dsj@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index b90cd37..dc6e9a3 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -566,17 +566,14 @@ static void __merge_refs(struct list_head *head, int mode)
 		struct __prelim_ref *pos2 = pos1, *tmp;
 
 		list_for_each_entry_safe_continue(pos2, tmp, head, list) {
-			struct __prelim_ref *xchg, *ref1 = pos1, *ref2 = pos2;
+			struct __prelim_ref *ref1 = pos1, *ref2 = pos2;
 			struct extent_inode_elem *eie;
 
 			if (!ref_for_same_block(ref1, ref2))
 				continue;
 			if (mode == 1) {
-				if (!ref1->parent && ref2->parent) {
-					xchg = ref1;
-					ref1 = ref2;
-					ref2 = xchg;
-				}
+				if (!ref1->parent && ref2->parent)
+					swap(ref1, ref2);
 			} else {
 				if (ref1->parent != ref2->parent)
 					continue;