From patchwork Tue Dec 17 00:08:19 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Felipe Balbi X-Patchwork-Id: 3357721 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 8D3819F314 for ; Tue, 17 Dec 2013 00:13:01 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B60462025B for ; Tue, 17 Dec 2013 00:13:00 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CB8362024D for ; Tue, 17 Dec 2013 00:12:59 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VsiFs-00044X-Rh; Tue, 17 Dec 2013 00:11:21 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VsiFQ-00029F-Ne; Tue, 17 Dec 2013 00:10:52 +0000 Received: from arroyo.ext.ti.com ([192.94.94.40]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VsiE9-00020N-Ah for linux-arm-kernel@lists.infradead.org; Tue, 17 Dec 2013 00:09:41 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id rBH090CP020106; Mon, 16 Dec 2013 18:09:00 -0600 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id rBH09008013783; Mon, 16 Dec 2013 18:09:00 -0600 Received: from dflp33.itg.ti.com (10.64.6.16) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.2.342.3; Mon, 16 Dec 2013 18:09:00 -0600 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp33.itg.ti.com (8.14.3/8.13.8) with ESMTP id rBH090Kl011534; Mon, 16 Dec 2013 18:09:00 -0600 From: Felipe Balbi To: Subject: [PATCH 05/10] mfd: menelaus: Use for_each_set_bit() Date: Mon, 16 Dec 2013 18:08:19 -0600 Message-ID: <1387238904-7843-5-git-send-email-balbi@ti.com> X-Mailer: git-send-email 1.8.4.GIT In-Reply-To: <1387238904-7843-1-git-send-email-balbi@ti.com> References: <20131216153936.GQ18769@lee--X1> <1387238904-7843-1-git-send-email-balbi@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131216_190933_599712_4687536A X-CRM114-Status: UNSURE ( 9.28 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -7.4 (-------) Cc: Aaro Koskinen , Tony Lindgren , Linux Kernel Mailing List , Felipe Balbi , Linux OMAP Mailing List , Linux ARM Kernel Mailing List X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.7 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Signed-off-by: Felipe Balbi --- 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); }