From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: jamie@jamieiles.com
Cc: atull@altera.com, gnurou@gmail.com, linux-gpio@vger.kernel.org,
linux-kernel@vger.kernel.org, dinguyen@altera.com,
linus.walleij@linaro.org, sebastian.hesselbarth@gmail.com,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Subject: [PATCH 2/5] gpio: dwapb: use irq_linear_revmap() for the faster lookup
Date: Mon, 7 Apr 2014 12:13:06 +0200 [thread overview]
Message-ID: <1396865589-9972-3-git-send-email-bigeasy@linutronix.de> (raw)
In-Reply-To: <1396865589-9972-1-git-send-email-bigeasy@linutronix.de>
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
next prev parent reply other threads:[~2014-04-07 10:13 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-07 10:13 patches for the synopsys gpio controller, rount 3 Sebastian Andrzej Siewior
2014-04-07 10:13 ` [PATCH 1/5] gpio: dwapb: drop irq_setup_generic_chip() Sebastian Andrzej Siewior
2014-04-08 19:57 ` delicious quinoa
2014-04-10 17:35 ` Linus Walleij
2014-04-07 10:13 ` Sebastian Andrzej Siewior [this message]
2014-04-07 10:13 ` [PATCH 3/5] gpio: dwapb: use irq_gc_lock() for locking instead bc's lock Sebastian Andrzej Siewior
2014-04-07 10:13 ` [PATCH 4/5] gpio: dwapb: use a second irq chip Sebastian Andrzej Siewior
2014-04-07 10:13 ` [PATCH 5/5] gpio: dwapb: use d->mask instead od BIT(bit) Sebastian Andrzej Siewior
2014-04-07 12:26 ` Gerhard Sittig
2014-04-07 18:26 ` Sebastian Andrzej Siewior
2014-04-07 19:01 ` Gerhard Sittig
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