proc: Split the namespace stuff out into linux/proc_ns.h

Split the proc namespace stuff out into linux/proc_ns.h.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: netdev@vger.kernel.org
cc: Serge E. Hallyn <serge.hallyn@ubuntu.com>
cc: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/ipc/msgutil.c b/ipc/msgutil.c
index 5df8e4b..8f02017 100644
--- a/ipc/msgutil.c
+++ b/ipc/msgutil.c
@@ -16,7 +16,7 @@
 #include <linux/msg.h>
 #include <linux/ipc_namespace.h>
 #include <linux/utsname.h>
-#include <linux/proc_fs.h>
+#include <linux/proc_ns.h>
 #include <asm/uaccess.h>
 
 #include "util.h"