From patchwork Sat Jan 5 05:55:27 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Gustavo A. R. Silva" X-Patchwork-Id: 10749157 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 9D05091E for ; Sat, 5 Jan 2019 05:55:39 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8B154286CC for ; Sat, 5 Jan 2019 05:55:39 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7EE4B287AE; Sat, 5 Jan 2019 05:55:39 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,SUSPICIOUS_RECIPS autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CD37B286CC for ; Sat, 5 Jan 2019 05:55:38 +0000 (UTC) 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=4qCA+4Tn8uobHxqjpBSbVGHHsj9OOC6XJJsoAwA9nOI=; b=IC1CpmsZInC53+ 2e7ugtLNbuCwy/c5LuDBXowml8k2UpfhUuX3rnKXhEXYePEFaV8VT+Kz+WVuI7xWH8UV26lLomxkl 471zos5gfm6HMFKd/sLEObFISNlS6mRi2f8YRZu3Ryw8UZCkdXOBC5+Y3T86Af67ph7uXBMNii7ny YJALK0Y/E1PNwueWKXxUbTxM+u5i0sPNxKbr8+nTYMOW9mDJiurls4bxrj4jcxEPkt9BvnnnSYtX3 rgS2a8ED/UWDYIsASc4GA170oQ30XRyTLD4q7fTdD4NlKXByt/vhaGnTMHzUoWyXtwwWvR3uqKoFc CGKM6ZmPXRFLceOLrXcw==; 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 1gfevo-0001Dv-IT; Sat, 05 Jan 2019 05:55:36 +0000 Received: from gateway33.websitewelcome.com ([192.185.145.87]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gfevl-0001DF-J0 for linux-arm-kernel@lists.infradead.org; Sat, 05 Jan 2019 05:55:35 +0000 Received: from cm13.websitewelcome.com (cm13.websitewelcome.com [100.42.49.6]) by gateway33.websitewelcome.com (Postfix) with ESMTP id 307E54CD052 for ; Fri, 4 Jan 2019 23:55:32 -0600 (CST) Received: from gator4166.hostgator.com ([108.167.133.22]) by cmsmtp with SMTP id fevkgVdxPYTGMfevkgHmbe; Fri, 04 Jan 2019 23:55:32 -0600 X-Authority-Reason: nr=8 Received: from [189.250.130.205] (port=46934 helo=embeddedor) by gator4166.hostgator.com with esmtpa (Exim 4.91) (envelope-from ) id 1gfevh-004Nsg-H1; Fri, 04 Jan 2019 23:55:31 -0600 Date: Fri, 4 Jan 2019 23:55:27 -0600 From: "Gustavo A. R. Silva" To: Linus Walleij , Russell King Subject: [PATCH v2 2/2] ARM: integrator: impd1: use struct_size() in devm_kzalloc() Message-ID: <2795c5ba939fe23dda6c86135d56e68433f7d68a.1546667177.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: 1gfevh-004Nsg-H1 X-Source: X-Source-Args: X-Source-Dir: X-Source-Sender: (embeddedor) [189.250.130.205]:46934 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_215533_672455_1F09FF47 X-CRM114-Status: GOOD ( 10.87 ) 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" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP 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 --- Changes in v2: - Fix devm_kzalloc parameter reported by kbuild test robot. arch/arm/mach-integrator/impd1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mach-integrator/impd1.c b/arch/arm/mach-integrator/impd1.c index eb0149561be2..a0a1e2acdb5e 100644 --- a/arch/arm/mach-integrator/impd1.c +++ b/arch/arm/mach-integrator/impd1.c @@ -390,7 +390,7 @@ static int __ref impd1_probe(struct lm_device *dev) char *mmciname; lookup = devm_kzalloc(&dev->dev, - sizeof(*lookup) + 3 * sizeof(struct gpiod_lookup), + struct_size(lookup, table, 3), GFP_KERNEL); if (!lookup) return -ENOMEM;