From: Andrew Morton <akpm@linux-foundation.org>

mm/mempolicy.c: In function 'sys_migrate_pages':
mm/mempolicy.c:934: error: dereferencing pointer to incomplete type

Cc: Alexey Dobriyan <adobriyan@openvz.org>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Pavel Emelyanov <xemul@openvz.org>
Cc: Sukadev Bhattiprolu <sukadev@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/mempolicy.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN mm/mempolicy.c~pid-namespaces-changes-to-show-virtual-ids-to-user-use-find_task_by_pid_ns-in-places-that-operate-with-virtual-fix mm/mempolicy.c
--- a/mm/mempolicy.c~pid-namespaces-changes-to-show-virtual-ids-to-user-use-find_task_by_pid_ns-in-places-that-operate-with-virtual-fix
+++ a/mm/mempolicy.c
@@ -78,6 +78,7 @@
 #include <linux/slab.h>
 #include <linux/string.h>
 #include <linux/module.h>
+#include <linux/nsproxy.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
 #include <linux/compat.h>
_