[PATCH 3.10 02/62] clocksource: em_sti: Set cpu_possible_mask to fix SMP broadcast

From: Greg Kroah-Hartman
Date: Mon Jan 13 2014 - 20:03:20 EST


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

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

From: Magnus Damm <damm@xxxxxxxxxxxxx>

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@xxxxxxxxxxxxx>
Tested-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>
Reviewed-by: Stephen Boyd <sboyd@xxxxxxxxxxxxxx>
Signed-off-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
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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