Include internal.h to get the definition of simple_dname, to fix the
following sparse warning:

fs/d_path.c:317:6: warning: symbol 'simple_dname' was not declared. Should it be static?

Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
---
 fs/d_path.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/d_path.c b/fs/d_path.c
index 56a6ee4c6331..5f4da5c8d5db 100644
--- a/fs/d_path.c
+++ b/fs/d_path.c
@@ -7,6 +7,7 @@
 #include <linux/slab.h>
 #include <linux/prefetch.h>
 #include "mount.h"
+#include "internal.h"
 
 struct prepend_buffer {
 	char *buf;
-- 
2.39.2