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parisc: Switch to hotplug core state synchronization

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Switch to the CPU hotplug core state tracking and synchronization
mechanim. No functional change intended.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Tested-by: Helge Deller <deller@gmx.de> # parisc
Tested-by: Guilherme G. Piccoli <gpiccoli@igalia.com> # Steam Deck
Link: https://lore.kernel.org/r/20230512205256.859920443@linutronix.de
This commit is contained in:
Thomas Gleixner 2023-05-12 23:07:38 +02:00 committed by Peter Zijlstra
parent c8d2bcc467
commit 51e0efe1f2
3 changed files with 6 additions and 6 deletions
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1
arch/parisc/Kconfig
View File

@ -57,6 +57,7 @@ config PARISC
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_TRACEHOOK
select HAVE_REGS_AND_STACK_ACCESS_API
select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU
select GENERIC_SCHED_CLOCK
select GENERIC_IRQ_MIGRATION if SMP
select HAVE_UNSTABLE_SCHED_CLOCK if SMP

4
arch/parisc/kernel/process.c
View File

@ -166,8 +166,8 @@ void __noreturn arch_cpu_idle_dead(void)
local_irq_disable();
/* Tell __cpu_die() that this CPU is now safe to dispose of. */
(void)cpu_report_death();
/* Tell the core that this CPU is now safe to dispose of. */
cpuhp_ap_report_dead();
/* Ensure that the cache lines are written out. */
flush_cache_all_local();

7
arch/parisc/kernel/smp.c
View File

@ -500,11 +500,10 @@ int __cpu_disable(void)
void __cpu_die(unsigned int cpu)
{
pdc_cpu_rendezvous_lock();
}
if (!cpu_wait_death(cpu, 5)) {
pr_crit("CPU%u: cpu didn't die\n", cpu);
return;
}
void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu)
{
pr_info("CPU%u: is shutting down\n", cpu);
/* set task's state to interruptible sleep */