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authorAndy Lutomirski <luto@mit.edu>2011-07-13 09:24:10 -0400
committerH. Peter Anvin <hpa@linux.intel.com>2011-07-13 11:22:56 -0700
commit59e97e4d6fbcd5b74a94cb48bcbfc6f8478a5e93 (patch)
tree015fd8e63e1fcd8fdf7a066bd2e09a5636a14449 /arch/x86/lib/memmove_64.S
parentc9712944b2a12373cb6ff8059afcfb7e826a6c54 (diff)
downloadop-kernel-dev-59e97e4d6fbcd5b74a94cb48bcbfc6f8478a5e93.zip
op-kernel-dev-59e97e4d6fbcd5b74a94cb48bcbfc6f8478a5e93.tar.gz
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>
Diffstat (limited to 'arch/x86/lib/memmove_64.S')
-rw-r--r--arch/x86/lib/memmove_64.S11
1 files changed, 5 insertions, 6 deletions
diff --git a/arch/x86/lib/memmove_64.S b/arch/x86/lib/memmove_64.S
index d0ec9c2..ee16461 100644
--- a/arch/x86/lib/memmove_64.S
+++ b/arch/x86/lib/memmove_64.S
@@ -9,6 +9,7 @@
#include <linux/linkage.h>
#include <asm/dwarf2.h>
#include <asm/cpufeature.h>
+#include <asm/alternative-asm.h>
#undef memmove
@@ -214,11 +215,9 @@ ENTRY(memmove)
.previous
.section .altinstructions,"a"
- .align 8
- .quad .Lmemmove_begin_forward
- .quad .Lmemmove_begin_forward_efs
- .word X86_FEATURE_ERMS
- .byte .Lmemmove_end_forward-.Lmemmove_begin_forward
- .byte .Lmemmove_end_forward_efs-.Lmemmove_begin_forward_efs
+ altinstruction_entry .Lmemmove_begin_forward, \
+ .Lmemmove_begin_forward_efs,X86_FEATURE_ERMS, \
+ .Lmemmove_end_forward-.Lmemmove_begin_forward, \
+ .Lmemmove_end_forward_efs-.Lmemmove_begin_forward_efs
.previous
ENDPROC(memmove)
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