tree 9a7ca00d88f64ba69abb3cc1cb7a4a803033b12a
parent 9ea2b82ed6265a31f9a84886d74d8a2ef01b27c8
author H. Peter Anvin <hpa@zytor.com> 1219729155 -0700
committer H. Peter Anvin <hpa@zytor.com> 1219729155 -0700

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>