Commit-ID: cf8c5009ee37d25cf4da0a250f3044ec6d1144a0
Gitweb: http://git.kernel.org/tip/cf8c5009ee37d25cf4da0a250f3044ec6d1144a0
Author: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
AuthorDate: Wed, 23 Dec 2015 16:59:12 +0530
Committer: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
CommitDate: Thu, 25 Feb 2016 14:34:05 +0100
clockevents/drivers/arm_arch_timer: Implement ->set_state_oneshot_stopped()
set_state_oneshot_stopped() is called by the clkevt core, when the next
event is required at an expiry time of 'KTIME_MAX'. This normally
happens with NO_HZ_{IDLE|FULL} in both LOWRES/HIGHRES modes.
This patch makes the clockevent device to stop on such an event, to
avoid spurious interrupts, as explained by: commit 8fff52fd5093
("clockevents: Introduce CLOCK_EVT_STATE_ONESHOT_STOPPED state").
Signed-off-by: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
---
drivers/clocksource/arm_arch_timer.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c
index 7c567f0..f0dd9d4 100644
--- a/drivers/clocksource/arm_arch_timer.c
+++ b/drivers/clocksource/arm_arch_timer.c
@@ -274,10 +274,12 @@ static void __arch_timer_setup(unsigned type,
if (arch_timer_use_virtual) {
clk->irq = arch_timer_ppi[VIRT_PPI];
clk->set_state_shutdown = arch_timer_shutdown_virt;
+ clk->set_state_oneshot_stopped = arch_timer_shutdown_virt;
clk->set_next_event = arch_timer_set_next_event_virt;
} else {
clk->irq = arch_timer_ppi[PHYS_SECURE_PPI];
clk->set_state_shutdown = arch_timer_shutdown_phys;
+ clk->set_state_oneshot_stopped = arch_timer_shutdown_phys;
clk->set_next_event = arch_timer_set_next_event_phys;
}
} else {
@@ -287,10 +289,12 @@ static void __arch_timer_setup(unsigned type,
clk->cpumask = cpu_all_mask;
if (arch_timer_mem_use_virtual) {
clk->set_state_shutdown = arch_timer_shutdown_virt_mem;
+ clk->set_state_oneshot_stopped = arch_timer_shutdown_virt_mem;
clk->set_next_event =
arch_timer_set_next_event_virt_mem;
} else {
clk->set_state_shutdown = arch_timer_shutdown_phys_mem;
+ clk->set_state_oneshot_stopped = arch_timer_shutdown_phys_mem;
clk->set_next_event =
arch_timer_set_next_event_phys_mem;
}
--
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