[PATCH 15/22] arm64/cpuinfo: Make hotplug notifier symmetric

[Sebastian Andrzej Siewior]

From: Anna-Maria Gleixner <anna-maria@xxxxxxxxxxxxx>

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.

Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will.deacon@xxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Signed-off-by: Anna-Maria Gleixner <anna-maria@xxxxxxxxxxxxx>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
 arch/arm64/kernel/cpuinfo.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c
index b3d5b3e8fbcb..19aad7041e14 100644
--- a/arch/arm64/kernel/cpuinfo.c
+++ b/arch/arm64/kernel/cpuinfo.c
@@ -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;
 	}
-- 
2.10.2