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arm64/cpuinfo: Make hotplug notifier symmetric

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There is no requirement to keep the sysfs files around until the CPU is
completely dead. Remove them during the DOWN_PREPARE notification. This is
a preparatory patch for converting to the hotplug state machine.

Signed-off-by: Anna-Maria Gleixner <anna-maria@linutronix.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: rt@linutronix.de
Cc: linux-arm-kernel@lists.infradead.org
Link: http://lkml.kernel.org/r/20161126231350.10321-16-bigeasy@linutronix.de
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Anna-Maria Gleixner 2016-11-27 00:13:43 +01:00 committed by Thomas Gleixner
parent e46b1db249
commit 914fb85f01
1 changed files with 2 additions and 1 deletions
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3
arch/arm64/kernel/cpuinfo.c
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@ -272,9 +272,10 @@ static int cpuid_callback(struct notifier_block *nb,
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_ONLINE:
case CPU_DOWN_FAILED:
rc = cpuid_add_regs(cpu);
break;
case CPU_DEAD:
case CPU_DOWN_PREPARE:
rc = cpuid_remove_regs(cpu);
break;
}