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 <[email protected]>
Acked-by: Hugh Dickins <[email protected]>
Cc: Petr Holasek <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/mm/ksm.c b/mm/ksm.c
index 9f182f99ff5e5e89c87eba4bd4df4afa6a683026..d4ee1591520b2d8cf4867eea3f64a472535cfae3 100644 (file)
--- 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--;