linux-kernel - [PATCH 3.11 208/208] clocksource: em_sti: Set cpu_possible

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Date:	Mon, 13 Jan 2014 16:00:49 +0000
From:	Luis Henriques <luis.henriques@...onical.com>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	kernel-team@...ts.ubuntu.com
Cc:	Magnus Damm <damm@...nsource.se>,
	Simon Horman <horms+renesas@...ge.net.au>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Luis Henriques <luis.henriques@...onical.com>
Subject: [PATCH 3.11 208/208] clocksource: em_sti: Set cpu_possible_mask to fix SMP broadcast

3.11.10.3 -stable review patch.  If anyone has any objections, please let me know.

------------------

From: Magnus Damm <damm@...nsource.se>

commit 2199a5574b6d94b9ca26c6345356f45ec60fef8b upstream.

Update the STI driver by setting cpu_possible_mask to make EMEV2
SMP work as expected together with the ARM broadcast timer.

This breakage was introduced by:

f7db706 ARM: 7674/1: smp: Avoid dummy clockevent being preferred over real hardware clock-event

Without this fix SMP operation is broken on EMEV2 since no
broadcast timer interrupts trigger on the secondary CPU cores.

Signed-off-by: Magnus Damm <damm@...nsource.se>
Tested-by: Simon Horman <horms+renesas@...ge.net.au>
Reviewed-by: Stephen Boyd <sboyd@...eaurora.org>
Signed-off-by: Simon Horman <horms+renesas@...ge.net.au>
Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Signed-off-by: Luis Henriques <luis.henriques@...onical.com>
---
 drivers/clocksource/em_sti.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/clocksource/em_sti.c b/drivers/clocksource/em_sti.c
index 4329a29..3141849 100644
--- a/drivers/clocksource/em_sti.c
+++ b/drivers/clocksource/em_sti.c
@@ -301,7 +301,7 @@ static void em_sti_register_clockevent(struct em_sti_priv *p)
 	ced->name = dev_name(&p->pdev->dev);
 	ced->features = CLOCK_EVT_FEAT_ONESHOT;
 	ced->rating = 200;
-	ced->cpumask = cpumask_of(0);
+	ced->cpumask = cpu_possible_mask;
 	ced->set_next_event = em_sti_clock_event_next;
 	ced->set_mode = em_sti_clock_event_mode;
 
-- 
1.8.3.2

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