From: Ralf Baechle <ralf@linux-mips.org>
Date: Mon, 15 Oct 2007 15:30:24 +0000 (+0100)
Subject: [MIPS] Fix aliasing bug in copy_user_highpage, take 2.
X-Git-Tag: v2.6.24-rc1~831^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=985c30ef4d7c2a4f0e979a507a7e2f7f09b096c3;p=pandora-kernel.git

[MIPS] Fix aliasing bug in copy_user_highpage, take 2.

Turns out b868868ae0f7272228c95cc760338ffe35bb739d  wasn't quite right.
When called for a page that isn't marked dirty it would artificially
create an alias instead of doing the obvious thing and access the page
via KSEG0.

The same issue also exists in copy_to_user_page and copy_from_user_page
which was causing the machine to die under rare circumstances for example
when running ps if the BUG_ON() assertion added by the earlier fix was
getting triggered.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

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