[PATCH] fix remaining missing includes

Fix more include file problems that surfaced since I submitted the previous
fix-missing-includes.patch.  This should now allow not to include sched.h
from module.h, which is done by a followup patch.

Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/fs/9p/error.c b/fs/9p/error.c
index fee5d19..834cb17 100644
--- a/fs/9p/error.c
+++ b/fs/9p/error.c
@@ -33,6 +33,7 @@
 
 #include <linux/list.h>
 #include <linux/jhash.h>
+#include <linux/string.h>
 
 #include "debug.h"
 #include "error.h"