x86: make fixups wordsize agnostic
This patch uses the _ASM_ALIGN and _ASM_PTR macros
to make the fixups in native_read/write_msr_safe look the same
for x86_64 and i386. Besides using this macros, we also have to
take the explicit instruction suffixes out. It's okay
because all this instructions uses registers, and can be sized by
them.
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/include/asm-x86/msr.h b/include/asm-x86/msr.h
index cb72223..792fde2 100644
--- a/include/asm-x86/msr.h
+++ b/include/asm-x86/msr.h
@@ -33,6 +33,7 @@
#ifdef __KERNEL__
#ifndef __ASSEMBLY__
+#include <asm/asm.h>
#include <asm/errno.h>
static inline unsigned long long native_read_msr(unsigned int msr)
@@ -48,14 +49,14 @@
{
unsigned long long val;
- asm volatile("2: rdmsr ; xorl %0,%0\n"
+ asm volatile("2: rdmsr ; xor %0,%0\n"
"1:\n\t"
".section .fixup,\"ax\"\n\t"
- "3: movl %3,%0 ; jmp 1b\n\t"
+ "3: mov %3,%0 ; jmp 1b\n\t"
".previous\n\t"
".section __ex_table,\"a\"\n"
- " .align 4\n\t"
- " .long 2b,3b\n\t"
+ _ASM_ALIGN "\n\t"
+ _ASM_PTR " 2b,3b\n\t"
".previous"
: "=r" (*err), "=A" (val)
: "c" (msr), "i" (-EFAULT));
@@ -73,14 +74,14 @@
unsigned low, unsigned high)
{
int err;
- asm volatile("2: wrmsr ; xorl %0,%0\n"
+ asm volatile("2: wrmsr ; xor %0,%0\n"
"1:\n\t"
".section .fixup,\"ax\"\n\t"
- "3: movl %4,%0 ; jmp 1b\n\t"
+ "3: mov %4,%0 ; jmp 1b\n\t"
".previous\n\t"
".section __ex_table,\"a\"\n"
- " .align 4\n\t"
- " .long 2b,3b\n\t"
+ _ASM_ALIGN "\n\t"
+ _ASM_PTR " 2b,3b\n\t"
".previous"
: "=a" (err)
: "c" (msr), "0" (low), "d" (high),