From: Joakim Tjernlund <joakim.tjernlund@transmode.se>
Date: Tue, 29 Dec 2009 05:10:58 +0000 (+0000)
Subject: powerpc/8xx: Always pin kernel instruction TLB
X-Git-Tag: v2.6.33-rc5~21^2~15
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9f4f04ba2b117a5c741d019629d7ffccdc621122;p=pandora-kernel.git

powerpc/8xx: Always pin kernel instruction TLB

Various kernel asm modifies SRR0/SRR1 just before executing
a rfi. If such code crosses a page boundary you risk a TLB miss
which will clobber SRR0/SRR1. Avoid this by always pinning
kernel instruction TLB space.

Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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