From: Christoph Lameter <clameter@sgi.com>
Date: Thu, 27 Mar 2008 04:03:04 +0000 (-0700)
Subject: x86: stricter check in follow_huge_addr()
X-Git-Tag: v2.6.25-rc8~73^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=25e59881f109dc6378ebc463ae4c2de907435de3;p=pandora-kernel.git

x86: stricter check in follow_huge_addr()

The first page of the compound page is determined in follow_huge_addr()
but then PageCompound() only checks if the page is part of a compound page.
PageHead() allows checking if this is indeed the first page of the
compound.

Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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