linux-kernel - [PATCH 05/10] mfd: menelaus: Use for_each_set

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <1387238904-7843-5-git-send-email-balbi@ti.com>
Date:	Mon, 16 Dec 2013 18:08:19 -0600
From:	Felipe Balbi <balbi@...com>
To:	<lee.jones@...aro.org>
CC:	Tony Lindgren <tony@...mide.com>,
	Linux OMAP Mailing List <linux-omap@...r.kernel.org>,
	Linux ARM Kernel Mailing List 
	<linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Aaro Koskinen <aaro.koskinen@....fi>,
	Felipe Balbi <balbi@...com>
Subject: [PATCH 05/10] mfd: menelaus: Use for_each_set_bit()

That macro just helps removing some extra line of code and hides ffs()
calls.

While at that, also fix a variable shadowing bug where 'int irq' was
being redeclared inside inner loop while it was also argument to
interrupt handler.

Tested-by: Aaro Koskinen <aaro.koskinen@....fi>
Signed-off-by: Felipe Balbi <balbi@...com>
---
 drivers/mfd/menelaus.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/mfd/menelaus.c b/drivers/mfd/menelaus.c
index 87d80a8..d3e3022 100644
--- a/drivers/mfd/menelaus.c
+++ b/drivers/mfd/menelaus.c
@@ -795,24 +795,22 @@ static irqreturn_t menelaus_irq(int irq, void *_menelaus)
 {
 	struct menelaus_chip *menelaus = _menelaus;
 	void (*handler)(struct menelaus_chip *menelaus);
-	unsigned isr;
+	unsigned long isr;
+	unsigned long i;
 
 	isr = (menelaus_read_reg(MENELAUS_INT_STATUS2)
 			& ~menelaus->mask2) << 8;
 	isr |= menelaus_read_reg(MENELAUS_INT_STATUS1)
 		& ~menelaus->mask1;
 
-	while (isr) {
-		int irq = fls(isr) - 1;
-		isr &= ~(1 << irq);
-
+	for_each_set_bit(i, &isr, 16) {
 		mutex_lock(&menelaus->lock);
-		menelaus_disable_irq(irq);
-		menelaus_ack_irq(irq);
-		handler = menelaus->handlers[irq];
+		menelaus_disable_irq(i);
+		menelaus_ack_irq(i);
+		handler = menelaus->handlers[i];
 		if (handler)
 			handler(menelaus);
-		menelaus_enable_irq(irq);
+		menelaus_enable_irq(i);
 		mutex_unlock(&menelaus->lock);
 	}
 
-- 
1.8.4.GIT

--
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/