ftrace: mcount call site on boot nops core

[deliverable/linux.git] / include / asm-x86 / ftrace.h

diff --git a/include/asm-x86/ftrace.h b/include/asm-x86/ftrace.h
index be0e004ad148123fc5f4b85e2c5a6c2ce8569aea..1bb6f9bbe1ab99319d4df113086e46ec17e9c7e7 100644 (file)
--- a/include/asm-x86/ftrace.h
+++ b/include/asm-x86/ftrace.h
@@ -7,6 +7,16 @@
 
 #ifndef __ASSEMBLY__
 extern void mcount(void);
+
+static inline unsigned long ftrace_call_adjust(unsigned long addr)
+{
+       /*
+        * call mcount is "e8 <4 byte offset>"
+        * The addr points to the 4 byte offset and the caller of this
+        * function wants the pointer to e8. Simply subtract one.
+        */
+       return addr - 1;
+}
 #endif
 
 #endif /* CONFIG_FTRACE */