cpumask: Optimize cpumask_of_cpu in kernel/time/tick-common.c

 */

static void tick_setup_device(struct tick_device *td,

			      struct clock_event_device *newdev, int cpu,

			      cpumask_t cpumask)

			      const cpumask_t *cpumask)

{

	ktime_t next_event;

	void (*handler)(struct clock_event_device *) = NULL;

	 * When the device is not per cpu, pin the interrupt to the

	 * current cpu:

	 */

	if (!cpus_equal(newdev->cpumask, cpumask))

		irq_set_affinity(newdev->irq, cpumask);

	if (!cpus_equal(newdev->cpumask, *cpumask))

		irq_set_affinity(newdev->irq, *cpumask);

	/*

	 * When global broadcasting is active, check if the current

	struct tick_device *td;

	int cpu, ret = NOTIFY_OK;

	unsigned long flags;

	cpumask_t cpumask;

	cpumask_of_cpu_ptr_declare(cpumask);

	spin_lock_irqsave(&tick_device_lock, flags);

	cpu = smp_processor_id();

	cpumask_of_cpu_ptr_next(cpumask, cpu);

	if (!cpu_isset(cpu, newdev->cpumask))

		goto out_bc;

	td = &per_cpu(tick_cpu_device, cpu);

	curdev = td->evtdev;

	cpumask = cpumask_of_cpu(cpu);

	/* cpu local device ? */

	if (!cpus_equal(newdev->cpumask, cpumask)) {

	if (!cpus_equal(newdev->cpumask, *cpumask)) {

		/*

		 * If the cpu affinity of the device interrupt can not

		 * If we have a cpu local device already, do not replace it

		 * by a non cpu local device

		 */

		if (curdev && cpus_equal(curdev->cpumask, cpumask))

		if (curdev && cpus_equal(curdev->cpumask, *cpumask))

			goto out_bc;

	}