Merge branch 'setns'

* setns:
  ns: Wire up the setns system call

Done as a merge to make it easier to fix up conflicts in arm due to
addition of sendmmsg system call
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index 24cdac3..80f7896 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -384,6 +384,7 @@
 		CALL(sys_clock_adjtime)
 		CALL(sys_syncfs)
 		CALL(sys_sendmmsg)
+/* 375 */	CALL(sys_setns)
 #ifndef syscalls_counted
 .equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
 #define syscalls_counted