Merge branch 'perf-probes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel...

[cascardo/linux.git] / arch / x86 / include / asm / alternative.h

diff --git a/arch/x86/include/asm/alternative.h b/arch/x86/include/asm/alternative.h
index 643d6ab..b09ec55 100644 (file)
--- a/arch/x86/include/asm/alternative.h
+++ b/arch/x86/include/asm/alternative.h
@@ -130,11 +130,16 @@ static inline int alternatives_text_reserved(void *start, void *end)
        asm volatile (ALTERNATIVE(oldinstr, newinstr, feature)          \
                : output : "i" (0), ## input)
 
+/* Like alternative_io, but for replacing a direct call with another one. */
+#define alternative_call(oldfunc, newfunc, feature, output, input...)  \
+       asm volatile (ALTERNATIVE("call %P[old]", "call %P[new]", feature) \
+               : output : [old] "i" (oldfunc), [new] "i" (newfunc), ## input)
+
 /*
  * use this macro(s) if you need more than one output parameter
  * in alternative_io
  */
-#define ASM_OUTPUT2(a, b) a, b
+#define ASM_OUTPUT2(a...) a
 
 struct paravirt_patch_site;
 #ifdef CONFIG_PARAVIRT