fs/drop_caches.c: make 2 functions static

Make the following needlessly global functions static:

- drop_pagecache()
- drop_slab()

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/drop_caches.c b/fs/drop_caches.c
index 59375ef..e2c6b65 100644
--- a/fs/drop_caches.c
+++ b/fs/drop_caches.c
@@ -25,7 +25,7 @@
 	spin_unlock(&inode_lock);
 }
 
-void drop_pagecache(void)
+static void drop_pagecache(void)
 {
 	struct super_block *sb;
 
@@ -45,7 +45,7 @@
 	spin_unlock(&sb_lock);
 }
 
-void drop_slab(void)
+static void drop_slab(void)
 {
 	int nr_objects;