mm, hugetlb: remove redundant list_empty check in gather_surplus_pages()

If list is empty, list_for_each_entry_safe() doesn't do anything.  So,
this check is redundant.  Remove it.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Hillf Danton <dhillf@gmail.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Davidlohr Bueso <davidlohr.bueso@hp.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit c0d934ba278935fa751057091fe4a7c02d814f68)
Signed-off-by: Mark Brown <broonie@linaro.org>

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 9998630727085611e5d4717ee65b23420db26895..39b717e1267d1649908df2942cc044e9bff7cdf1 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1020,11 +1020,8 @@ free:
        spin_unlock(&hugetlb_lock);
 
        /* Free unnecessary surplus pages to the buddy allocator */
-       if (!list_empty(&surplus_list)) {
-               list_for_each_entry_safe(page, tmp, &surplus_list, lru) {
-                       put_page(page);
-               }
-       }
+       list_for_each_entry_safe(page, tmp, &surplus_list, lru)
+               put_page(page);
        spin_lock(&hugetlb_lock);
 
        return ret;