x86: Make alternative instruction pointers relative
This save a few bytes on x86-64 and means that future patches can
apply alternatives to unrelocated code.
Signed-off-by: Andy Lutomirski <luto@mit.edu>
Link: http://lkml.kernel.org/r/ff64a6b9a1a3860ca4a7b8b6dc7b4754f9491cd7.1310563276.git.luto@mit.edu
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 71cc380..9929b35 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -331,8 +331,8 @@
"2:\n"
".section .altinstructions,\"a\"\n"
_ASM_ALIGN "\n"
- _ASM_PTR "1b\n"
- _ASM_PTR "0\n" /* no replacement */
+ " .long 1b - .\n"
+ " .long 0\n" /* no replacement */
" .word %P0\n" /* feature bit */
" .byte 2b - 1b\n" /* source len */
" .byte 0\n" /* replacement len */
@@ -349,8 +349,8 @@
"2:\n"
".section .altinstructions,\"a\"\n"
_ASM_ALIGN "\n"
- _ASM_PTR "1b\n"
- _ASM_PTR "3f\n"
+ " .long 1b - .\n"
+ " .long 3f - .\n"
" .word %P1\n" /* feature bit */
" .byte 2b - 1b\n" /* source len */
" .byte 4f - 3f\n" /* replacement len */