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Date:	Mon,  7 Apr 2014 12:13:06 +0200
From:	Sebastian Andrzej Siewior <>
	Sebastian Andrzej Siewior <>
Subject: [PATCH 2/5] gpio: dwapb: use irq_linear_revmap() for the faster lookup

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

Signed-off-by: Sebastian Andrzej Siewior <>
 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);
 		irq_status &= ~BIT(hwirq);

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