autofs: make autofs_expire_indirect() static

autofs_expire_indirect() isn't used outside of fs/autofs/expire.c so make
it static.

Link: http://lkml.kernel.org/r/152937733512.21213.10509996499623738446.stgit@pluto.themaw.net
Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/autofs/autofs_i.h

@@ -156,9 +156,6 @@ int autofs_do_expire_multi(struct super_block *sb, struct vfsmount *mnt,
 			   struct autofs_sb_info *sbi, int when);
 int autofs_expire_multi(struct super_block *, struct vfsmount *,
 			struct autofs_sb_info *, int __user *);
-struct dentry *autofs_expire_indirect(struct super_block *sb,
-				      struct vfsmount *mnt,
-				      struct autofs_sb_info *sbi, int how);
 
 /* Device node initialization */
 

fs/autofs/expire.c

@@ -424,10 +424,10 @@ static struct dentry *should_expire(struct dentry *dentry,
  *  - it is unused by any user process
  *  - it has been unused for exp_timeout time
  */
-struct dentry *autofs_expire_indirect(struct super_block *sb,
-				      struct vfsmount *mnt,
-				      struct autofs_sb_info *sbi,
-				      int how)
+static struct dentry *autofs_expire_indirect(struct super_block *sb,
+					     struct vfsmount *mnt,
+					     struct autofs_sb_info *sbi,
+					     int how)
 {
 	unsigned long timeout;
 	struct dentry *root = sb->s_root;