From patchwork Thu Aug 20 14:30:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Leizhen (ThunderTown)" X-Patchwork-Id: 11726371 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 922B114F6 for ; Thu, 20 Aug 2020 14:30:59 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (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 7A2B52078D for ; Thu, 20 Aug 2020 14:30:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7A2B52078D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id DFB64134A64A2; Thu, 20 Aug 2020 07:30:58 -0700 (PDT) Received-SPF: Pass (mailfrom) identity=mailfrom; client-ip=45.249.212.35; helo=huawei.com; envelope-from=thunder.leizhen@huawei.com; receiver= Received: from huawei.com (szxga07-in.huawei.com [45.249.212.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 93B63134A649B for ; Thu, 20 Aug 2020 07:30:55 -0700 (PDT) Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id A0524680DFEFE3E90D12; Thu, 20 Aug 2020 22:30:51 +0800 (CST) Received: from DESKTOP-C3MD9UG.china.huawei.com (10.174.177.253) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Thu, 20 Aug 2020 22:30:43 +0800 From: Zhen Lei To: Oliver O'Halloran , Dan Williams , Vishal Verma , "Dave Jiang" , Ira Weiny , linux-nvdimm , linux-kernel Subject: [PATCH 4/4] libnvdimm: avoid unnecessary judgments in nvdimm_namespace_disk_name() Date: Thu, 20 Aug 2020 22:30:27 +0800 Message-ID: <20200820143027.3241-5-thunder.leizhen@huawei.com> X-Mailer: git-send-email 2.26.0.windows.1 In-Reply-To: <20200820143027.3241-1-thunder.leizhen@huawei.com> References: <20200820143027.3241-1-thunder.leizhen@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.177.253] X-CFilter-Loop: Reflected Message-ID-Hash: TTTPW35D7QRO3V32P7F62DELVHUJX4U4 X-Message-ID-Hash: TTTPW35D7QRO3V32P7F62DELVHUJX4U4 X-MailFrom: thunder.leizhen@huawei.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: Zhen Lei X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: suffix ? suffix : "" appears three times, it's easy to get rid of it by initialize the local variable "suffix" to empty string. To avoid having rows that exceed 80 columns, add a new local variable "region_id". No functional change, but it can reduce the code size. Before: text data bss dec hex filename 41749 3697 16 45462 b196 drivers/nvdimm/namespace_devs.o After: text data bss dec hex filename 41653 3697 16 45366 b136 drivers/nvdimm/namespace_devs.o Signed-off-by: Zhen Lei --- drivers/nvdimm/namespace_devs.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/drivers/nvdimm/namespace_devs.c b/drivers/nvdimm/namespace_devs.c index 6da67f4d641a27c..ef2800c5da4c99c 100644 --- a/drivers/nvdimm/namespace_devs.c +++ b/drivers/nvdimm/namespace_devs.c @@ -157,7 +157,8 @@ const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, char *name) { struct nd_region *nd_region = to_nd_region(ndns->dev.parent); - const char *suffix = NULL; + const char *suffix = ""; + int region_id = nd_region->id; if (ndns->claim && is_nd_btt(ndns->claim)) suffix = "s"; @@ -173,17 +174,14 @@ const char *nvdimm_namespace_disk_name(struct nd_namespace_common *ndns, } if (nsidx) - sprintf(name, "pmem%d.%d%s", nd_region->id, nsidx, - suffix ? suffix : ""); + sprintf(name, "pmem%d.%d%s", region_id, nsidx, suffix); else - sprintf(name, "pmem%d%s", nd_region->id, - suffix ? suffix : ""); + sprintf(name, "pmem%d%s", region_id, suffix); } else if (is_namespace_blk(&ndns->dev)) { struct nd_namespace_blk *nsblk; nsblk = to_nd_namespace_blk(&ndns->dev); - sprintf(name, "ndblk%d.%d%s", nd_region->id, nsblk->id, - suffix ? suffix : ""); + sprintf(name, "ndblk%d.%d%s", region_id, nsblk->id, suffix); } else { return NULL; }