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authorWill Deacon <will.deacon@arm.com>2012-11-23 18:55:30 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2012-11-28 09:46:57 +0000
commitea3aacf5f22c1002cac97985354658072232e280 (patch)
treeaecbe3136c65dccf303001668da3ff257a4deac5 /arch
parente23739b4ade80a3a7f87198f008f6c44a7cbc9fd (diff)
downloadlinux-ea3aacf5f22c1002cac97985354658072232e280.tar.bz2
ARM: 7586/1: sp804: set cpumask to cpu_possible_mask for clock event device
The SP804 driver statically initialises the cpumask of the clock event device to be cpu_all_mask, which is derived from the compile-time constant NR_CPUS. This breaks SMP_ON_UP systems where the interrupt controller handling the sp804 doesn't have the irq_set_affinity callback on the irq_chip, because the common timer code fails to identify the device as cpu-local and ends up treating it as a broadcast device instead. This patch fixes the problem by using cpu_possible_mask at runtime, which will correctly represent the possible CPUs when SMP_ON_UP is being used. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch')
-rw-r--r--arch/arm/common/timer-sp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm/common/timer-sp.c b/arch/arm/common/timer-sp.c
index df13a3ffff35..9d2d3ba339ff 100644
--- a/arch/arm/common/timer-sp.c
+++ b/arch/arm/common/timer-sp.c
@@ -162,7 +162,6 @@ static struct clock_event_device sp804_clockevent = {
.set_mode = sp804_set_mode,
.set_next_event = sp804_set_next_event,
.rating = 300,
- .cpumask = cpu_all_mask,
};
static struct irqaction sp804_timer_irq = {
@@ -185,6 +184,7 @@ void __init sp804_clockevents_init(void __iomem *base, unsigned int irq,
clkevt_reload = DIV_ROUND_CLOSEST(rate, HZ);
evt->name = name;
evt->irq = irq;
+ evt->cpumask = cpu_possible_mask;
setup_irq(irq, &sp804_timer_irq);
clockevents_config_and_register(evt, rate, 0xf, 0xffffffff);