From: Li Zefan <lizf@cn.fujitsu.com>
Date: Sat, 23 Feb 2008 23:24:13 +0000 (-0800)
Subject: memcgroup: remove a useless VM_BUG_ON()
X-Git-Tag: v2.6.25-rc3~17
X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=7fde4c3eb7ee68828d76a2148ed6d70b6a794add;p=linux-2.6-omap-h63xx.git

memcgroup: remove a useless VM_BUG_ON()

Remove this VM_BUG_ON(), as Balbir stated:

We used to have a for loop with !list_empty() as a termination condition
and VM_BUG_ON(!pc) is a spill over.  With the new loop, VM_BUG_ON(!pc) does
not make sense.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Balbir Singh <balbir@in.ibm.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 6bded84c20c..bb4d7acfbca 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -534,7 +534,6 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan,
 		if (scan >= nr_to_scan)
 			break;
 		page = pc->page;
-		VM_BUG_ON(!pc);
 
 		if (unlikely(!PageLRU(page)))
 			continue;