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x86, doc: Revert "x86: Document rdmsr_safe restrictions"

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This reverts commit ce37defc0f
"x86: Document rdmsr_safe restrictions", as these restrictions no longer apply.

Reported-by: Borislav Petkov <borislav.petkov@amd.com>
Link: http://lkml.kernel.org/r/20120419171609.GH3221@aftab.osrc.amd.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
H. Peter Anvin 2012-04-19 17:07:34 -07:00
parent 4c5023a3fa
commit 060feb6500
1 changed files with 1 additions and 8 deletions
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9
arch/x86/include/asm/msr.h
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@ -169,14 +169,7 @@ static inline int wrmsr_safe(unsigned msr, unsigned low, unsigned high)
return native_write_msr_safe(msr, low, high);
}
/*
* rdmsr with exception handling.
*
* Please note that the exception handling works only after we've
* switched to the "smart" #GP handler in trap_init() which knows about
* exception tables - using this macro earlier than that causes machine
* hangs on boxes which do not implement the @msr in the first argument.
*/
/* rdmsr with exception handling */
#define rdmsr_safe(msr, p1, p2) \
({ \
int __err; \