From patchwork Fri May 8 12:10:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: chenzhou X-Patchwork-Id: 1286045 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-pci-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=huawei.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 49JTb13rtnz9sRY for ; Fri, 8 May 2020 22:06:53 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726618AbgEHMGq (ORCPT ); Fri, 8 May 2020 08:06:46 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:4303 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726616AbgEHMGq (ORCPT ); Fri, 8 May 2020 08:06:46 -0400 Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 71793139C267C3A8E53A; Fri, 8 May 2020 20:06:44 +0800 (CST) Received: from localhost.localdomain.localdomain (10.175.113.25) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Fri, 8 May 2020 20:06:36 +0800 From: Chen Zhou To: , , CC: , , Subject: [PATCH -next] PCI: endpoint: use kmemdup_nul() in pci_epf_create() Date: Fri, 8 May 2020 20:10:29 +0800 Message-ID: <20200508121029.167018-1-chenzhou10@huawei.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-Originating-IP: [10.175.113.25] X-CFilter-Loop: Reflected Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org It is more efficient to use kmemdup_nul() if the size is known exactly. The doc in kernel: "Note: Use kmemdup_nul() instead if the size is known exactly." Signed-off-by: Chen Zhou --- drivers/pci/endpoint/pci-epf-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c index 244e00f48c5c..f035d2ebcae5 100644 --- a/drivers/pci/endpoint/pci-epf-core.c +++ b/drivers/pci/endpoint/pci-epf-core.c @@ -252,7 +252,7 @@ struct pci_epf *pci_epf_create(const char *name) return ERR_PTR(-ENOMEM); len = strchrnul(name, '.') - name; - epf->name = kstrndup(name, len, GFP_KERNEL); + epf->name = kmemdup_nul(name, len, GFP_KERNEL); if (!epf->name) { kfree(epf); return ERR_PTR(-ENOMEM);