Commit 7202e979 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Peter Zijlstra
Browse files

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: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: default avatarMichael Kelley <mikelley@microsoft.com>
Tested-by: default avatarOleksandr 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
parent b3091f17

arch/csky/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/csky/include/asm/smp.h

+1 −1
Original line number Diff line number Diff line
@@ -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 */

arch/csky/kernel/smp.c

+2 −6
Original line number Diff line number Diff line
@@ -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();