From patchwork Thu Sep 11 08:19:49 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Wang, Yalin" X-Patchwork-Id: 4883041 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 94CCA9F32F for ; Thu, 11 Sep 2014 08:22:22 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 33A5F20225 for ; Thu, 11 Sep 2014 08:22:21 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (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 0BEA4201EF for ; Thu, 11 Sep 2014 08:22:20 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1XRzc7-0000Vi-El; Thu, 11 Sep 2014 08:20:23 +0000 Received: from cnbjrel02.sonyericsson.com ([219.141.167.166]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1XRzc4-0007ha-DP for linux-arm-kernel@lists.infradead.org; Thu, 11 Sep 2014 08:20:20 +0000 From: "Wang, Yalin" To: "'broonie@kernel.org'" , "'linux-driver@qlogic.com'" , "'linux-kernel@vger.kernel.org'" , "'linux-arm-kernel@lists.infradead.org'" , "'linux@arm.linux.org.uk'" Date: Thu, 11 Sep 2014 16:19:49 +0800 Subject: [PATCH] regmap:change struct regmap's internal locks as union Thread-Topic: [PATCH] regmap:change struct regmap's internal locks as union Thread-Index: Ac/NmSfIko22QWRERAaJ/i5dugB5tw== Message-ID: <35FD53F367049845BC99AC72306C23D103CDBFBFB01A@CNBJMBX05.corpusers.net> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140911_012020_633910_B8B85E56 X-CRM114-Status: UNSURE ( 7.85 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -2.3 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 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=-4.4 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_NONE, 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 this patch change struct regmap->mutex and struct regmap->spinlock as an union, because these 2 members are only used one of them, we change it to shrink the struct size. Signed-off-by: Yalin Wang --- drivers/base/regmap/internal.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h index bfc90b8..0da5865 100644 --- a/drivers/base/regmap/internal.h +++ b/drivers/base/regmap/internal.h @@ -49,8 +49,10 @@ struct regmap_async { }; struct regmap { - struct mutex mutex; - spinlock_t spinlock; + union { + struct mutex mutex; + spinlock_t spinlock; + }; unsigned long spinlock_flags; regmap_lock lock; regmap_unlock unlock;