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csky/smp: Switch to hotplug core state synchronization 

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/20230512205256.747254502@linutronix.de
This commit is contained in:
Thomas Gleixner 2023-05-12 23:07:35 +02:00 committed by Peter Zijlstra
parent b3091f172f
commit 7202e97964
3 changed files with 4 additions and 7 deletions
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1
arch/csky/Kconfig
View File

@ -96,6 +96,7 @@ config CSKY
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_STACKPROTECTOR
select HAVE_SYSCALL_TRACEPOINTS
select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU
select MAY_HAVE_SPARSE_IRQ
select MODULES_USE_ELF_RELA if MODULES
select OF

2
arch/csky/include/asm/smp.h
View File

@ -23,7 +23,7 @@ void __init set_send_ipi(void (*func)(const struct cpumask *mask), int irq);
int __cpu_disable(void);
void __cpu_die(unsigned int cpu);
static inline void __cpu_die(unsigned int cpu) { }
#endif /* CONFIG_SMP */

8
arch/csky/kernel/smp.c
View File

@ -291,12 +291,8 @@ int __cpu_disable(void)
return 0;
}
void __cpu_die(unsigned int cpu)
void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu)
{
if (!cpu_wait_death(cpu, 5)) {
pr_crit("CPU%u: shutdown failed\n", cpu);
return;
}
pr_notice("CPU%u: shutdown\n", cpu);
}
@ -304,7 +300,7 @@ void __noreturn arch_cpu_idle_dead(void)
{
idle_task_exit();
cpu_report_death();
cpuhp_ap_report_dead();
while (!secondary_stack)
arch_cpu_idle();