From: "Serge E. Hallyn" <serue@us.ibm.com>

For i386, an include of utsname.h by asm/elf.h hides the fact that
user_namespace needs sched.h.  To fix compilation for x86_64, just include
sched.h explicitly.

Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Cc: Herbert Poetzl <herbert@13thfloor.at>
Cc: Kirill Korotaev <dev@sw.ru>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 include/linux/user_namespace.h |    1 +
 1 files changed, 1 insertion(+)

diff -puN include/linux/user_namespace.h~user-namespace-add-the-framework-fix include/linux/user_namespace.h
--- a/include/linux/user_namespace.h~user-namespace-add-the-framework-fix
+++ a/include/linux/user_namespace.h
@@ -3,6 +3,7 @@
 
 #include <linux/kref.h>
 #include <linux/nsproxy.h>
+#include <linux/sched.h>
 
 #define UIDHASH_BITS	(CONFIG_BASE_SMALL ? 3 : 8)
 #define UIDHASH_SZ	(1 << UIDHASH_BITS)
_