x86/hpet: Use proper mask to modify hotplug action

Magic hex constants are a guarantee for wreckage when the defines change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index be0ebbb..a1f0e4a 100644 (file)
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -717,7 +717,7 @@ static int hpet_cpuhp_notify(struct notifier_block *n,
        struct hpet_work_struct work;
        struct hpet_dev *hdev = per_cpu(cpu_hpet_dev, cpu);
 
-       switch (action & 0xf) {
+       switch (action & ~CPU_TASKS_FROZEN) {
        case CPU_ONLINE:
                INIT_DELAYED_WORK_ONSTACK(&work.work, hpet_work);
                init_completion(&work.complete);