From: Vegard Nossum <vegard.nossum@gmail.com>
Date: Sun, 14 Sep 2008 17:03:53 +0000 (+0200)
Subject: x86: add memory clobber in switch_to()
X-Git-Tag: v2.6.28-rc1~611^2~63
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=33f8c40a30ae99e971d068c9ec6088e713c46f5f;p=pandora-kernel.git

x86: add memory clobber in switch_to()

Segment registers are reloaded, so we should add a memory clobber. The
generated assembly code is identical in my tests, but this doesn't mean
it is necessarily true for all configurations/compilers.

x86_64 already has the memory clobber.

Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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