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

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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>
This commit is contained in:
Dave Jones 2016-01-28 15:28:35 -05:00 committed by David Sterba
parent ac1407ba24
commit 8f682f6955
1 changed files with 3 additions and 6 deletions
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9
fs/btrfs/backref.c
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@ -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;