From: Rusty Russell <rusty@rustcorp.com.au>
Date: Tue, 11 Sep 2007 07:06:37 +0000 (+1000)
Subject: lguest: Fix guest crash when CONFIG_X86_USE_3DNOW=y
X-Git-Tag: v2.6.23-rc7~58
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c413fecc763e380ec93dc6faf726e7e735ade04e;p=pandora-kernel.git

lguest: Fix guest crash when CONFIG_X86_USE_3DNOW=y

One of the very first things lguest_init() does is a memcpy.  On
Athlon/Duron/K7 or CyrixIII/VIA-C3 or Geode GX/LX, this tries to use
MMX.

memcpy -> _mmx_memcpy -> kernel_fpu_begin -> clts -> paravirt_ops.clts

But we haven't set paravirt_ops.clts yet, so we do the native version
and crash.  The simplest solution is to use __memcpy.

Thanks to Michael Rasenberger for the bug report.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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