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sh/SH-X3 SMP: Convert to hotplug state machine

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Install the callbacks via the state machine.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-sh@vger.kernel.org
Cc: rt@linutronix.de
Link: http://lkml.kernel.org/r/20160906170457.32393-6-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Sebastian Andrzej Siewior 2016-09-06 19:04:41 +02:00 committed by Thomas Gleixner
parent 6b8d642239
commit 515332336b
2 changed files with 6 additions and 21 deletions
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26
arch/sh/kernel/cpu/sh4a/smp-shx3.c
View file

@ -122,32 +122,16 @@ static void shx3_update_boot_vector(unsigned int cpu)
__raw_writel(STBCR_RESET, STBCR_REG(cpu));
}
static int
shx3_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
static int shx3_cpu_prepare(unsigned int cpu)
{
unsigned int cpu = (unsigned int)hcpu;
switch (action) {
case CPU_UP_PREPARE:
shx3_update_boot_vector(cpu);
break;
case CPU_ONLINE:
pr_info("CPU %u is now online\n", cpu);
break;
case CPU_DEAD:
break;
}
return NOTIFY_OK;
shx3_update_boot_vector(cpu);
return 0;
}
static struct notifier_block shx3_cpu_notifier = {
.notifier_call = shx3_cpu_callback,
};
static int register_shx3_cpu_notifier(void)
{
register_hotcpu_notifier(&shx3_cpu_notifier);
cpuhp_setup_state_nocalls(CPUHP_SH_SH3X_PREPARE, "sh/shx3:prepare",
shx3_cpu_prepare, NULL);
return 0;
}
late_initcall(register_shx3_cpu_notifier);

1
include/linux/cpuhotplug.h
View file

@ -37,6 +37,7 @@ enum cpuhp_state {
CPUHP_POWERPC_MMU_CTX_PREPARE,
CPUHP_NOTIFY_PREPARE,
CPUHP_ARM_SHMOBILE_SCU_PREPARE,
CPUHP_SH_SH3X_PREPARE,
CPUHP_TIMERS_DEAD,
CPUHP_BRINGUP_CPU,
CPUHP_AP_IDLE_DEAD,