diff --git a/arch/x86/include/asm/ftrace.h b/arch/x86/include/asm/ftrace.h
index b5ef474be858..908d99b127d3 100644
--- a/arch/x86/include/asm/ftrace.h
+++ b/arch/x86/include/asm/ftrace.h
@@ -23,7 +23,6 @@
 #define HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
 
 #ifndef __ASSEMBLY__
-extern atomic_t modifying_ftrace_code;
 extern void __fentry__(void);
 
 static inline unsigned long ftrace_call_adjust(unsigned long addr)