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b=oQkTg8fb1IkuPkb3pCctfVf4hA4C1s1RNlUNKKujDVc6L3njYAAUomMjjlce0jlYu2M0FZgf641YK5gM3/XX8hhzsv5qn62fWnt5YvX3uUR6fHeVSpyoNP/H1CMDZHxTENz+wn4IYSXA+N+0t6aE6oMXZPLHaooM3Q9rsE19JDg= Received: from BLAPR10MB4835.namprd10.prod.outlook.com (2603:10b6:208:331::11) by BL0PR10MB2916.namprd10.prod.outlook.com (2603:10b6:208:77::30) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4734.22; Wed, 24 Nov 2021 19:10:41 +0000 Received: from BLAPR10MB4835.namprd10.prod.outlook.com ([fe80::d809:9016:4511:2bc6]) by BLAPR10MB4835.namprd10.prod.outlook.com ([fe80::d809:9016:4511:2bc6%7]) with mapi id 15.20.4734.021; Wed, 24 Nov 2021 19:10:41 +0000 From: Joao Martins To: linux-mm@kvack.org Cc: Dan Williams , Vishal Verma , Dave Jiang , Naoya Horiguchi , Matthew Wilcox , Jason Gunthorpe , John Hubbard , Jane Chu , Muchun Song , Mike Kravetz , Andrew Morton , Jonathan Corbet , Christoph Hellwig , nvdimm@lists.linux.dev, linux-doc@vger.kernel.org, Joao Martins Subject: [PATCH v6 06/10] device-dax: use struct_size() Date: Wed, 24 Nov 2021 19:10:01 +0000 Message-Id: <20211124191005.20783-7-joao.m.martins@oracle.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: <20211124191005.20783-1-joao.m.martins@oracle.com> References: <20211124191005.20783-1-joao.m.martins@oracle.com> X-ClientProxiedBy: AM0PR06CA0093.eurprd06.prod.outlook.com (2603:10a6:208:fa::34) To BLAPR10MB4835.namprd10.prod.outlook.com (2603:10b6:208:331::11) MIME-Version: 1.0 Received: from paddy.uk.oracle.com (138.3.204.47) by AM0PR06CA0093.eurprd06.prod.outlook.com (2603:10a6:208:fa::34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.20.4713.20 via Frontend Transport; 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dkim=pass header.d=oracle.com header.s=corp-2021-07-09 header.b=TYzJWhnf; dkim=pass header.d=oracle.onmicrosoft.com header.s=selector2-oracle-onmicrosoft-com header.b=oQkTg8fb; dmarc=pass (policy=none) header.from=oracle.com; spf=none (imf16.hostedemail.com: domain of joao.m.martins@oracle.com has no SPF policy when checking 205.220.165.32) smtp.mailfrom=joao.m.martins@oracle.com X-HE-Tag: 1637781052-224163 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Use the struct_size() helper for the size of a struct with variable array member at the end, rather than manually calculating it. Suggested-by: Dan Williams Signed-off-by: Joao Martins --- drivers/dax/device.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/drivers/dax/device.c b/drivers/dax/device.c index 0b82159b3564..038816b91af6 100644 --- a/drivers/dax/device.c +++ b/drivers/dax/device.c @@ -404,8 +404,9 @@ int dev_dax_probe(struct dev_dax *dev_dax) return -EINVAL; if (!pgmap) { - pgmap = devm_kzalloc(dev, sizeof(*pgmap) + sizeof(struct range) - * (dev_dax->nr_range - 1), GFP_KERNEL); + pgmap = devm_kzalloc(dev, + struct_size(pgmap, ranges, dev_dax->nr_range - 1), + GFP_KERNEL); if (!pgmap) return -ENOMEM; pgmap->nr_range = dev_dax->nr_range;