From: Andrea Arcangeli <aarcange@redhat.com>
Date: Fri, 6 Nov 2015 02:49:13 +0000 (-0800)
Subject: ksm: use the helper method to do the hlist_empty check
X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=98666f8a2576b12f5f3ebcef61a8cdbefede1be3;p=deliverable%2Flinux.git

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>
---

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--;