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tick/broadcast: Split __tick_broadcast_oneshot_control() into a helper

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In preparation for adding support for per-cpu wakeup timers, split
_tick_broadcast_oneshot_control() into a helper function which deals
only with the broadcast timer management across idle transitions.

Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20210524221818.15850-3-will@kernel.org
This commit is contained in:
Will Deacon 2021-05-24 23:18:15 +01:00 committed by Thomas Gleixner
parent c2d4fee3f6
commit e5007c288e
1 changed files with 20 additions and 13 deletions
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33
kernel/time/tick-broadcast.c
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@ -717,24 +717,16 @@ static void broadcast_shutdown_local(struct clock_event_device *bc,
clockevents_switch_state(dev, CLOCK_EVT_STATE_SHUTDOWN);
}
int __tick_broadcast_oneshot_control(enum tick_broadcast_state state)
static int ___tick_broadcast_oneshot_control(enum tick_broadcast_state state,
struct tick_device *td,
int cpu)
{
struct clock_event_device *bc, *dev;
int cpu, ret = 0;
struct clock_event_device *bc, *dev = td->evtdev;
int ret = 0;
ktime_t now;
/*
* If there is no broadcast device, tell the caller not to go
* into deep idle.
*/
if (!tick_broadcast_device.evtdev)
return -EBUSY;
dev = this_cpu_ptr(&tick_cpu_device)->evtdev;
raw_spin_lock(&tick_broadcast_lock);
bc = tick_broadcast_device.evtdev;
cpu = smp_processor_id();
if (state == TICK_BROADCAST_ENTER) {
/*
@ -863,6 +855,21 @@ out:
return ret;
}
int __tick_broadcast_oneshot_control(enum tick_broadcast_state state)
{
struct tick_device *td = this_cpu_ptr(&tick_cpu_device);
int cpu = smp_processor_id();
if (tick_broadcast_device.evtdev)
return ___tick_broadcast_oneshot_control(state, td, cpu);
/*
* If there is no broadcast device, tell the caller not
* to go into deep idle.
*/
return -EBUSY;
}
/*
* Reset the one shot broadcast for a cpu
*