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authorH. Peter Anvin <hpa@linux.intel.com>2012-04-20 04:07:34 +0400
committerH. Peter Anvin <hpa@linux.intel.com>2012-04-20 04:07:34 +0400
commit060feb650010c261fcfbae9de9348b46cedcd3cd (patch)
tree4b9c478222c77bd572201086b62f3c2ec808a171
parent4c5023a3fa2ec12b7ed313b276b157917575745b (diff)
downloadlinux-060feb650010c261fcfbae9de9348b46cedcd3cd.tar.xz
x86, doc: Revert "x86: Document rdmsr_safe restrictions"
This reverts commit ce37defc0f6673f5ca2c92ed5cfcaf290ae7dd16 "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>
-rw-r--r--arch/x86/include/asm/msr.h9
1 files changed, 1 insertions, 8 deletions
diff --git a/arch/x86/include/asm/msr.h b/arch/x86/include/asm/msr.h
index 95203d40ffdd..084ef95274cd 100644
--- a/arch/x86/include/asm/msr.h
+++ b/arch/x86/include/asm/msr.h
@@ -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; \