[PATCH 2/5] tick/broadcast: Split __tick_broadcast_oneshot_control() into a helper
From: Will Deacon <will@kernel.org>
Date: 2021-05-20 18:47:36
Also in:
lkml
Subsystem:
nohz, dynticks support, the rest · Maintainers:
Anna-Maria Behnsen, Frederic Weisbecker, Ingo Molnar, Thomas Gleixner, Linus Torvalds
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. Cc: Frederic Weisbecker <redacted> Cc: Thomas Gleixner <redacted> Cc: Marc Zyngier <maz@kernel.org> Cc: Lorenzo Colitti <redacted> Cc: John Stultz <redacted> Cc: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Will Deacon <will@kernel.org> --- kernel/time/tick-broadcast.c | 33 ++++++++++++++++++++------------- 1 file changed, 20 insertions(+), 13 deletions(-)
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index fb794ff4855e..f3f2f4ba4321 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c@@ -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 @@ int __tick_broadcast_oneshot_control(enum tick_broadcast_state state) 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 *
--
2.31.1.818.g46aad6cb9e-goog
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