Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755148AbaDGKNf (ORCPT ); Mon, 7 Apr 2014 06:13:35 -0400 Received: from www.linutronix.de ([62.245.132.108]:50060 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754636AbaDGKNY (ORCPT ); Mon, 7 Apr 2014 06:13:24 -0400 From: Sebastian Andrzej Siewior 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 Subject: [PATCH 2/5] gpio: dwapb: use irq_linear_revmap() for the faster lookup Date: Mon, 7 Apr 2014 12:13:06 +0200 Message-Id: <1396865589-9972-3-git-send-email-bigeasy@linutronix.de> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1396865589-9972-1-git-send-email-bigeasy@linutronix.de> References: <1396865589-9972-1-git-send-email-bigeasy@linutronix.de> X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 --- 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/