afs: Need linux/random.h

We should #include linux/random.h to use get_random().

Signed-off-by: David Howells <[email protected]>
diff --git a/fs/afs/main.c b/fs/afs/main.c
index 35de0c0..0b187ef 100644
--- a/fs/afs/main.c
+++ b/fs/afs/main.c
@@ -14,6 +14,7 @@
 #include <linux/init.h>
 #include <linux/completion.h>
 #include <linux/sched.h>
+#include <linux/random.h>
 #include "internal.h"
 
 MODULE_DESCRIPTION("AFS Client File System");