mm: fix -Wmissing-prototypes warnings

We get two warnings when build kernel W=1:

  mm/shuffle.c:36:12: warning: no previous prototype for `shuffle_show' [-Wmissing-prototypes]
  mm/sparse.c:220:6: warning: no previous prototype for `subsection_mask_set' [-Wmissing-prototypes]

Make the functions static to fix this.

Link: http://lkml.kernel.org/r/1566978161-7293-1-git-send-email-wang.yi59@zte.com.cn
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/shuffle.c b/mm/shuffle.c
index 3ce12481b1dccfb01112ca9b168a442cc81d5d4f..b3fe97fd665418adeb0b2d75419b5bd425db945e 100644 (file)
--- 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 bf32de9e666b5697f74cdbe319d4c783237065ab..f6891c1992b181cfd2c48b9b84dcd5c0ee1244ae 100644 (file)
--- 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);