x86, alternative: Add altinstruction_entry macro
authorFenghua Yu <fenghua.yu@intel.com>
Tue, 17 May 2011 22:29:13 +0000 (15:29 -0700)
committerH. Peter Anvin <hpa@linux.intel.com>
Tue, 17 May 2011 22:40:25 +0000 (15:40 -0700)
Add altinstruction_entry macro to generate .altinstructions section
entries from assembly code.  This should be less failure-prone than
open-coding.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Link: http://lkml.kernel.org/r/1305671358-14478-5-git-send-email-fenghua.yu@intel.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
arch/x86/include/asm/alternative-asm.h

index a63a68be1cce2258daf9cadf0d465b291296c930..94d420b360d11cdfbbd4a39f13c19bd8d76fc7e0 100644 (file)
        .endm
 #endif
 
+.macro altinstruction_entry orig alt feature orig_len alt_len
+       .align 8
+       .quad \orig
+       .quad \alt
+       .word \feature
+       .byte \orig_len
+       .byte \alt_len
+.endm
+
 #endif  /*  __ASSEMBLY__  */