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Commit c23a7266 authored by Sebastian Andrzej Siewior's avatar Sebastian Andrzej Siewior Committed by Thomas Gleixner
Browse files

arm64/FP/SIMD: Convert to hotplug state machine 



Install the callbacks via the state machine.

Signed-off-by: default avatarSebastian Andrzej Siewior <bigeasy@linutronix.de>
Acked-by: default avatarWill 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: default avatarThomas Gleixner <tglx@linutronix.de>
parent da3ed651

arch/arm64/kernel/fpsimd.c

+5 −17
Original line number Diff line number Diff line
@@ -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;

	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

include/linux/cpuhotplug.h

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