From: Wen Congyang <wency@cn.fujitsu.com>
Date: Mon, 17 Sep 2012 21:08:55 +0000 (-0700)
Subject: memory hotplug: reset pgdat->kswapd to NULL if creating kernel thread fails
X-Git-Tag: v3.6-rc7~34^2~12
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=18b48d5873a6fc8e0e6044ddb572fcda26988f19;p=pandora-kernel.git

memory hotplug: reset pgdat->kswapd to NULL if creating kernel thread fails

If kthread_run() fails, pgdat->kswapd contains errno.  When we stop this
thread, we only check whether pgdat->kswapd is NULL and access it.  If
it contains errno, it will cause page fault.  Reset pgdat->kswapd to
NULL when creating kernel thread fails can avoid this problem.

Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Reviewed-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

Reading git-diff-tree failed