From: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Date: Mon, 26 Oct 2009 23:50:23 +0000 (-0700)
Subject: mm: don't call pte_unmap() against an improper pte
X-Git-Tag: v2.6.32-rc6~60
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c36987e2ef32e1bb7850379515f21187cba44754;p=pandora-kernel.git

mm: don't call pte_unmap() against an improper pte

There are some places where we do like:

	pte = pte_map();
	do {
		(do break in some conditions)
	} while (pte++, ...);
	pte_unmap(pte - 1);

But if the loop breaks at the first loop, pte_unmap() unmaps invalid pte.

This patch is a fix for this problem.

Signed-off-by: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Reviewd-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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