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authorJeff Layton <jlayton@poochiereds.net>2015-09-09 01:03:44 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-09 01:35:28 +0300
commit26f5d7609f03ad8d6dc552458e4e371a62416b37 (patch)
tree33868d7b635a40367d0848dc4b049a8485d1572d
parent21cd3a604797c2774676926a95a3d17d4cd5cbb3 (diff)
downloadlinux-26f5d7609f03ad8d6dc552458e4e371a62416b37.tar.xz
list_lru: don't call list_lru_from_kmem if the list_head is empty
If the list_head is empty then we'll have called list_lru_from_kmem for nothing. Move that call inside of the list_empty if block. Signed-off-by: Jeff Layton <jeff.layton@primarydata.com> Reviewed-by: Vladimir Davydov <vdavydov@parallels.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/list_lru.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/list_lru.c b/mm/list_lru.c
index 909eca2c820e..e1da19fac1b3 100644
--- a/mm/list_lru.c
+++ b/mm/list_lru.c
@@ -99,8 +99,8 @@ bool list_lru_add(struct list_lru *lru, struct list_head *item)
struct list_lru_one *l;
spin_lock(&nlru->lock);
- l = list_lru_from_kmem(nlru, item);
if (list_empty(item)) {
+ l = list_lru_from_kmem(nlru, item);
list_add_tail(item, &l->list);
l->nr_items++;
spin_unlock(&nlru->lock);
@@ -118,8 +118,8 @@ bool list_lru_del(struct list_lru *lru, struct list_head *item)
struct list_lru_one *l;
spin_lock(&nlru->lock);
- l = list_lru_from_kmem(nlru, item);
if (!list_empty(item)) {
+ l = list_lru_from_kmem(nlru, item);
list_del_init(item);
l->nr_items--;
spin_unlock(&nlru->lock);