From: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Tue, 26 Sep 2006 08:52:34 +0000 (+0200)
Subject: [PATCH] i386: fix dubious segment register clear in cpu_init()
X-Git-Tag: v2.6.19-rc1~1077^2~107
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5758d5dfef1c514200bda3f29ba700f1c3e3bc99;p=pandora-kernel.git

[PATCH] i386: fix dubious segment register clear in cpu_init()

Fix a very dubious piece of code in
arch/i386/kernel/cpu/common.c:cpu_init().  This clears out %fs and
%gs, but clobbers %eax in the process without telling gcc.  It turns
out that gcc happens to be not using %eax at that point anyway so it
doesn't matter much, but it looks like a bomb waiting to go off.

This does end up saving an instruction, because gcc wants %eax==0 for
the set_debugreg()s below.

Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andi Kleen <ak@suse.de>
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