ksm: use the helper method to do the hlist_empty check

This just uses the helper function to cleanup the assumption on the
hlist_node internals.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Petr Holasek <pholasek@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/mm/ksm.c b/mm/ksm.c
index 9f182f99ff5e..d4ee1591520b 100644
--- a/mm/ksm.c
+++ b/mm/ksm.c
@@ -625,7 +625,7 @@ static void remove_rmap_item_from_tree(struct rmap_item *rmap_item)
                 unlock_page(page);
                 put_page(page);
 
-                if (stable_node->hlist.first)
+                if (!hlist_empty(&stable_node->hlist))
                         ksm_pages_sharing--;
                 else
                         ksm_pages_shared--;