linux-kernel - [PATCH 7/7] gpio: dwapb: use d->mask instead od BIT(bit)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Sat, 22 Mar 2014 17:16:44 +0100
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	atull@...era.com
Cc:	linus.walleij@...aro.org, gnurou@...il.com,
	linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
	dinguyen@...era.com, delicious.quinoa@...il.com,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH 7/7] gpio: dwapb: use d->mask instead od BIT(bit)

d->mask contains exact the same information as BIT(bit) so we could save
a few cycles here.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 drivers/gpio/gpio-dwapb.c | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index 3c9cdda..ebfcf5c 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -113,7 +113,7 @@ static void dwapb_irq_enable(struct irq_data *d)
 
 	irq_gc_lock(igc);
 	val = readl(gpio->regs + GPIO_INTEN);
-	val |= BIT(d->hwirq);
+	val |= d->mask;
 	writel(val, gpio->regs + GPIO_INTEN);
 	irq_gc_unlock(igc);
 }
@@ -126,7 +126,7 @@ static void dwapb_irq_disable(struct irq_data *d)
 
 	irq_gc_lock(igc);
 	val = readl(gpio->regs + GPIO_INTEN);
-	val &= ~BIT(d->hwirq);
+	val &= d->mask;
 	writel(val, gpio->regs + GPIO_INTEN);
 	irq_gc_unlock(igc);
 }
@@ -158,7 +158,6 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type)
 {
 	struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);
 	struct dwapb_gpio *gpio = igc->private;
-	int bit = d->hwirq;
 	unsigned long level, polarity;
 
 	if (type & ~(IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
@@ -171,24 +170,24 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type)
 
 	switch (type) {
 	case IRQ_TYPE_EDGE_BOTH:
-		level |= BIT(bit);
-		dwapb_toggle_trigger(gpio, bit);
+		level |= d->mask;
+		dwapb_toggle_trigger(gpio, d->hwirq);
 		break;
 	case IRQ_TYPE_EDGE_RISING:
-		level |= BIT(bit);
-		polarity |= BIT(bit);
+		level |= d->mask;
+		polarity |= d->mask;
 		break;
 	case IRQ_TYPE_EDGE_FALLING:
-		level |= BIT(bit);
-		polarity &= ~BIT(bit);
+		level |= d->mask;
+		polarity &= ~d->mask;
 		break;
 	case IRQ_TYPE_LEVEL_HIGH:
-		level &= ~BIT(bit);
-		polarity |= BIT(bit);
+		level &= ~d->mask;
+		polarity |= d->mask;
 		break;
 	case IRQ_TYPE_LEVEL_LOW:
-		level &= ~BIT(bit);
-		polarity &= ~BIT(bit);
+		level &= ~d->mask;
+		polarity &= ~d->mask;
 		break;
 	}
 
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/