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    Subject[PATCH 19/54] drivers/irqchip: replace cpumask_weight with cpumask_empty where appropriate
    Date
    bcm6345_l1_of_init() calls cpumask_weight() to check if any bit of a given
    cpumask is set. We can do it more efficiently with cpumask_empty() because
    cpumask_empty() stops traversing the cpumask as soon as it finds first set
    bit, while cpumask_weight() counts all bits unconditionally.

    Signed-off-by: Yury Norov <yury.norov@gmail.com>
    ---
    drivers/irqchip/irq-bcm6345-l1.c | 2 +-
    1 file changed, 1 insertion(+), 1 deletion(-)

    diff --git a/drivers/irqchip/irq-bcm6345-l1.c b/drivers/irqchip/irq-bcm6345-l1.c
    index fd079215c17f..142a7431745f 100644
    --- a/drivers/irqchip/irq-bcm6345-l1.c
    +++ b/drivers/irqchip/irq-bcm6345-l1.c
    @@ -315,7 +315,7 @@ static int __init bcm6345_l1_of_init(struct device_node *dn,
    cpumask_set_cpu(idx, &intc->cpumask);
    }

    - if (!cpumask_weight(&intc->cpumask)) {
    + if (cpumask_empty(&intc->cpumask)) {
    ret = -ENODEV;
    goto out_free;
    }
    --
    2.30.2
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