From: Petr Holasek <pholasek@redhat.com>
Date: Thu, 13 Jan 2011 01:00:34 +0000 (-0800)
Subject: kpagecount: add slab page checking because _mapcount is in a union
X-Git-Tag: v2.6.38-rc1~312
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a6fc86d2b43bf1086557f023a24adf91db915559;p=pandora-kernel.git

kpagecount: add slab page checking because _mapcount is in a union

Add a PageSlab() check before adding the _mapcount value to /kpagecount.
page->_mapcount is in a union with the SLAB structure so for pages
controlled by SLAB, page_mapcount() returns nonsense.

Signed-off-by: Petr Holasek <pholasek@redhat.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Cc: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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