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

mm/migrate.c: In function 'sys_move_pages':
mm/migrate.c:921: 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/migrate.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN mm/migrate.c~pid-namespaces-changes-to-show-virtual-ids-to-user-use-find_task_by_pid_ns-in-places-that-operate-with-virtual-fix-2 mm/migrate.c
--- a/mm/migrate.c~pid-namespaces-changes-to-show-virtual-ids-to-user-use-find_task_by_pid_ns-in-places-that-operate-with-virtual-fix-2
+++ a/mm/migrate.c
@@ -19,6 +19,7 @@
 #include <linux/pagemap.h>
 #include <linux/buffer_head.h>
 #include <linux/mm_inline.h>
+#include <linux/nsproxy.h>
 #include <linux/pagevec.h>
 #include <linux/rmap.h>
 #include <linux/topology.h>
_