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arm64/FP/SIMD: Convert to hotplug state machine 

Install the callbacks via the state machine.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: Will Deacon <will.deacon@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: rt@linutronix.de
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20160906170457.32393-2-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Sebastian Andrzej Siewior 2016-09-06 19:04:37 +02:00 committed by Thomas Gleixner
parent da3ed6519b
commit c23a7266e6
2 changed files with 6 additions and 17 deletions
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22
arch/arm64/kernel/fpsimd.c
View File

@ -299,28 +299,16 @@ static inline void fpsimd_pm_init(void) { }
#endif /* CONFIG_CPU_PM */
#ifdef CONFIG_HOTPLUG_CPU
static int fpsimd_cpu_hotplug_notifier(struct notifier_block *nfb,
unsigned long action,
void *hcpu)
static int fpsimd_cpu_dead(unsigned int cpu)
{
unsigned int cpu = (long)hcpu;
switch (action) {
case CPU_DEAD:
case CPU_DEAD_FROZEN:
per_cpu(fpsimd_last_state, cpu) = NULL;
break;
}
return NOTIFY_OK;
per_cpu(fpsimd_last_state, cpu) = NULL;
return 0;
}
static struct notifier_block fpsimd_cpu_hotplug_notifier_block = {
.notifier_call = fpsimd_cpu_hotplug_notifier,
};
static inline void fpsimd_hotplug_init(void)
{
register_cpu_notifier(&fpsimd_cpu_hotplug_notifier_block);
cpuhp_setup_state_nocalls(CPUHP_ARM64_FPSIMD_DEAD, "arm64/fpsimd:dead",
NULL, fpsimd_cpu_dead);
}
#else

1
include/linux/cpuhotplug.h
View File

@ -20,6 +20,7 @@ enum cpuhp_state {
CPUHP_SOFTIRQ_DEAD,
CPUHP_NET_MVNETA_DEAD,
CPUHP_CPUIDLE_DEAD,
CPUHP_ARM64_FPSIMD_DEAD,
CPUHP_WORKQUEUE_PREP,
CPUHP_POWER_NUMA_PREPARE,
CPUHP_HRTIMERS_PREPARE,