From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A33C7C43387 for ; Fri, 4 Jan 2019 17:24:20 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 66E5320656 for ; Fri, 4 Jan 2019 17:24:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="t8TVwbb7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 66E5320656 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=embeddedor.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=o6sIKQAbmUO2OrGLgcM2KwvGEDRFCNU8qFPEau24LvI=; b=t8TVwbb7E1cZI2 kboOtJ/bxL2LLrMl4GSVlJRtjv3jQChhT2Snl8Yy3+PQ/p4ZH6Mp6YsgJLmjh9HlZWyJhDelCQdAi p9+AXLSZXoKJWQvhJkQGyIS7s8D7cJM0fA/Xy01cymadn5frwDSOAukwb+z49XpiPaJD2drhODXao FY07JNailpmi9yXr/f0YXkPImMapwhmDAqtO09bNiwydGJNFRXYRmivUMINzFEViWlbH0RMAy9Mva /JSWmJNQK/vXXt+fSjo5CkSC3af1ayPcLVOKF5BYNP+g3iuq3ZeYrXdgKMt1Psy8KWdb4Qxy41vNH XBdEFonik74e3dygz/eg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gfTCk-0002LK-MB; Fri, 04 Jan 2019 17:24:18 +0000 Received: from gateway21.websitewelcome.com ([192.185.45.154]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gfTCh-0002Kr-Oa for linux-arm-kernel@lists.infradead.org; Fri, 04 Jan 2019 17:24:17 +0000 Received: from cm16.websitewelcome.com (cm16.websitewelcome.com [100.42.49.19]) by gateway21.websitewelcome.com (Postfix) with ESMTP id E8C92403B9A05 for ; Fri, 4 Jan 2019 11:18:54 -0600 (CST) Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with SMTP id fT7WgAyVD4FKpfT7WgdG0H; Fri, 04 Jan 2019 11:18:54 -0600 X-Authority-Reason: nr=8 Received: from [189.250.130.205] (port=34900 helo=embeddedor) by gator4166.hostgator.com with esmtpa (Exim 4.91) (envelope-from ) id 1gfT7V-000GyY-Se; Fri, 04 Jan 2019 11:18:54 -0600 Date: Fri, 4 Jan 2019 11:18:51 -0600 From: "Gustavo A. R. Silva" To: Linus Walleij , Russell King Subject: [PATCH 2/2] ARM: integrator: impd1: use struct_size() in devm_kzalloc() Message-ID: <9005dbee894cfbada5e57d6ddda9fdf4d711b0a4.1546621488.git.gustavo@embeddedor.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.9.4 (2018-02-28) X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - gator4166.hostgator.com X-AntiAbuse: Original Domain - lists.infradead.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - embeddedor.com X-BWhitelist: no X-Source-IP: 189.250.130.205 X-Source-L: No X-Exim-ID: 1gfT7V-000GyY-Se X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedor) [189.250.130.205]:34900 X-Source-Auth: gustavo@embeddedor.com X-Email-Count: 11 X-Source-Cap: Z3V6aWRpbmU7Z3V6aWRpbmU7Z2F0b3I0MTY2Lmhvc3RnYXRvci5jb20= X-Local-Domain: yes X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190104_092415_839305_D81922ED X-CRM114-Status: GOOD ( 10.27 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, "Gustavo A. R. Silva" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct foo { int stuff; void *entry[]; }; instance = devm_kzalloc(dev, sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL); Instead of leaving these open-coded and prone to type mistakes, we can now use the new struct_size() helper: instance = devm_kzalloc(dev, struct_size(instance, entry, count), GFP_KERNEL); This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva --- arch/arm/mach-integrator/impd1.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/mach-integrator/impd1.c b/arch/arm/mach-integrator/impd1.c index eb0149561be2..8ccf01af3817 100644 --- a/arch/arm/mach-integrator/impd1.c +++ b/arch/arm/mach-integrator/impd1.c @@ -389,8 +389,8 @@ static int __ref impd1_probe(struct lm_device *dev) char *chipname; char *mmciname; - lookup = devm_kzalloc(&dev->dev, - sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup), + lookup = devm_kzalloc(&dev->deva, + struct_size(lookup, table, 3), GFP_KERNEL); if (!lookup) return -ENOMEM; -- 2.20.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel