| From | Sebastian Andrzej Siewior <> | Subject | [PATCH 4/7] gpio: dwapb: use irq_linear_revmap() for the faster lookup | Date | Sat, 22 Mar 2014 17:16:41 +0100 |
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According to irq_linear_revmap() comment, it is slightly faster compared to irq_find_mapping() since we don't use a radix tree but a linear mapping.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> --- drivers/gpio/gpio-dwapb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index 4d25a06b..541b893 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -92,7 +92,7 @@ static void dwapb_irq_handler(u32 irq, struct irq_desc *desc) while (irq_status) { int hwirq = fls(irq_status) - 1; - int gpio_irq = irq_find_mapping(gpio->domain, hwirq); + int gpio_irq = irq_linear_revmap(gpio->domain, hwirq); generic_handle_irq(gpio_irq); irq_status &= ~BIT(hwirq); -- 1.9.1
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