linux-kernel - [PATCH 3.10 02/62] clocksource: em_sti: Set cpu_possible

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Date:	Mon, 13 Jan 2014 16:26:27 -0800
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Magnus Damm <damm@...nsource.se>,
	Simon Horman <horms+renesas@...ge.net.au>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>
Subject: [PATCH 3.10 02/62] clocksource: em_sti: Set cpu_possible_mask to fix SMP broadcast

3.10-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: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/clocksource/em_sti.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/clocksource/em_sti.c
+++ b/drivers/clocksource/em_sti.c
@@ -301,7 +301,7 @@ static void em_sti_register_clockevent(s
 	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;
 


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