From: H. Peter Anvin <hpa@zytor.com>
Date: Tue, 26 Aug 2008 05:39:15 +0000 (-0700)
Subject: x86: msr: fix bogus return values from rdmsr_safe/wrmsr_safe
X-Git-Tag: v2.6.27-rc5~5^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=08970fc4e0385790a7b093adfaa4165a189f9eb0;p=pandora-kernel.git

x86: msr: fix bogus return values from rdmsr_safe/wrmsr_safe

Impact: bogus error codes (+other?) on x86-64

The rdmsr_safe/wrmsr_safe routines have macros for the handling of the
edx:eax arguments.  Those macros take a variable number of assembly
arguments.  This is rather inherently incompatible with using
%digit-style escapes in the inline assembly; replace those with
%[name]-style escapes.

This fixes miscompilation on x86-64, which at the very least caused
bogus return values.  It is possible that this could also corrupt the
return value; I am not sure.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
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