diff --git a/mm/shuffle.c b/mm/shuffle.c
index 3ce12481b1dc..b3fe97fd6654 100644
--- a/mm/shuffle.c
+++ b/mm/shuffle.c
@@ -33,7 +33,7 @@ __meminit void page_alloc_shuffle(enum mm_shuffle_ctl ctl)
 }
 
 static bool shuffle_param;
-extern int shuffle_show(char *buffer, const struct kernel_param *kp)
+static int shuffle_show(char *buffer, const struct kernel_param *kp)
 {
 	return sprintf(buffer, "%c\n", test_bit(SHUFFLE_ENABLE, &shuffle_state)
 			? 'Y' : 'N');
diff --git a/mm/sparse.c b/mm/sparse.c
index bf32de9e666b..f6891c1992b1 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -219,7 +219,7 @@ static inline unsigned long first_present_section_nr(void)
 	return next_present_section_nr(-1);
 }
 
-void subsection_mask_set(unsigned long *map, unsigned long pfn,
+static void subsection_mask_set(unsigned long *map, unsigned long pfn,
 		unsigned long nr_pages)
 {
 	int idx = subsection_map_index(pfn);