diff --git a/kernel/printk.c b/kernel/printk.c
index 185bb45..c770e1a 100644
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -335,7 +335,7 @@
 
 static int __read_mostly ignore_loglevel;
 
-int __init ignore_loglevel_setup(char *str)
+static int __init ignore_loglevel_setup(char *str)
 {
 	ignore_loglevel = 1;
 	printk(KERN_INFO "debug: ignoring loglevel setting.\n");