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git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
tick/broadcast: Split __tick_broadcast_oneshot_control() into a helper
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
authored by
Will Deacon
and committed by
Thomas Gleixner
e5007c28
c2d4fee3
+20
-13
+20
-13
kernel/time/tick-broadcast.c
+20
-13
kernel/time/tick-broadcast.c
···
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clockevents_switch_state(dev, CLOCK_EVT_STATE_SHUTDOWN);
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}
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-
int __tick_broadcast_oneshot_control(enum tick_broadcast_state state)
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static int ___tick_broadcast_oneshot_control(enum tick_broadcast_state state,
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struct tick_device *td,
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int cpu)
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{
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struct clock_event_device *bc, *dev;
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int cpu, ret = 0;
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struct clock_event_device *bc, *dev = td->evtdev;
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int ret = 0;
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ktime_t now;
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-
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/*
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* If there is no broadcast device, tell the caller not to go
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* into deep idle.
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*/
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if (!tick_broadcast_device.evtdev)
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return -EBUSY;
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dev = this_cpu_ptr(&tick_cpu_device)->evtdev;
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raw_spin_lock(&tick_broadcast_lock);
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bc = tick_broadcast_device.evtdev;
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cpu = smp_processor_id();
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if (state == TICK_BROADCAST_ENTER) {
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/*
···
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out:
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raw_spin_unlock(&tick_broadcast_lock);
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return ret;
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}
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int __tick_broadcast_oneshot_control(enum tick_broadcast_state state)
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{
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struct tick_device *td = this_cpu_ptr(&tick_cpu_device);
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int cpu = smp_processor_id();
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+
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if (tick_broadcast_device.evtdev)
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return ___tick_broadcast_oneshot_control(state, td, cpu);
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+
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/*
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* If there is no broadcast device, tell the caller not
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* to go into deep idle.
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*/
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return -EBUSY;
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}
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/*