diff options
Diffstat (limited to 'arch/x86/include/asm/alternative-asm.h')
| -rw-r--r-- | arch/x86/include/asm/alternative-asm.h | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/arch/x86/include/asm/alternative-asm.h b/arch/x86/include/asm/alternative-asm.h new file mode 100644 index 00000000000..372231c22a4 --- /dev/null +++ b/arch/x86/include/asm/alternative-asm.h @@ -0,0 +1,31 @@ +#ifndef _ASM_X86_ALTERNATIVE_ASM_H +#define _ASM_X86_ALTERNATIVE_ASM_H + +#ifdef __ASSEMBLY__ + +#include <asm/asm.h> + +#ifdef CONFIG_SMP + .macro LOCK_PREFIX +672: lock + .pushsection .smp_locks,"a" + .balign 4 + .long 672b - . + .popsection + .endm +#else + .macro LOCK_PREFIX + .endm +#endif + +.macro altinstruction_entry orig alt feature orig_len alt_len + .long \orig - . + .long \alt - . + .word \feature + .byte \orig_len + .byte \alt_len +.endm + +#endif /* __ASSEMBLY__ */ + +#endif /* _ASM_X86_ALTERNATIVE_ASM_H */ |