diff --git a/include/linux/ftrace.h b/include/linux/ftrace.h
index 366c730..402fc06 100644
--- a/include/linux/ftrace.h
+++ b/include/linux/ftrace.h
@@ -980,7 +980,7 @@
 #define CALLER_ADDR5 ((unsigned long)ftrace_return_address(5))
 #define CALLER_ADDR6 ((unsigned long)ftrace_return_address(6))
 
-static inline unsigned long get_lock_parent_ip(void)
+static __always_inline unsigned long get_lock_parent_ip(void)
 {
 	unsigned long addr = CALLER_ADDR0;