From 0637e029392386e6996f5d6574aadccee8315efa Mon Sep 17 00:00:00 2001
From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Mon, 22 Apr 2013 21:15:59 +0200
Subject: [PATCH] nohz: Select wide RCU nocb for full dynticks

It makes testing and implementation much easier as we
know in advance that all CPUs are RCU nocbs.

Also this prepares to remove the dynamic check for
nohz_full= boot mask to be a subset of rcu_nocbs=

Eventually this should also help removing the requirement
for the boot CPU to be outside the full dynticks range.

Suggested-by: Christoph Lameter <cl@linux.com>
Suggested-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Geoff Levand <geoff@infradead.org>
Cc: Gilad Ben Yossef <gilad@benyossef.com>
Cc: Hakan Akkan <hakanakkan@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kevin Hilman <khilman@linaro.org>
Cc: Li Zhong <zhong@linux.vnet.ibm.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
---
 kernel/time/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig
index f6a792ab4983..e1ac129b01c9 100644
--- a/kernel/time/Kconfig
+++ b/kernel/time/Kconfig
@@ -110,6 +110,7 @@ config NO_HZ_FULL
 	select NO_HZ_COMMON
 	select RCU_USER_QS
 	select RCU_NOCB_CPU
+	select RCU_NOCB_CPU_ALL
 	select CONTEXT_TRACKING_FORCE
 	select IRQ_WORK
 	help