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Diffstat (limited to 'include/asm-x86/ftrace.h')
-rw-r--r--include/asm-x86/ftrace.h16
1 files changed, 13 insertions, 3 deletions
diff --git a/include/asm-x86/ftrace.h b/include/asm-x86/ftrace.h
index 5c68b32ee1c..1bb6f9bbe1a 100644
--- a/include/asm-x86/ftrace.h
+++ b/include/asm-x86/ftrace.h
@@ -1,5 +1,5 @@
-#ifndef _ASM_X86_FTRACE
-#define _ASM_X86_FTRACE
+#ifndef ASM_X86__FTRACE_H
+#define ASM_X86__FTRACE_H
#ifdef CONFIG_FTRACE
#define MCOUNT_ADDR ((long)(mcount))
@@ -7,8 +7,18 @@
#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 */
-#endif /* _ASM_X86_FTRACE */
+#endif /* ASM_X86__FTRACE_H */