x86, alternative: Add altinstruction_entry macro

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>
git-mirror · May 17, 2011 · 9072d11 · 9072d11
1 parent 5097313
commit 9072d11
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/arch/x86/include/asm/alternative-asm.h b/arch/x86/include/asm/alternative-asm.h
@@ -15,4 +15,13 @@
 	.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__  */