From nobody Tue Dec 16 16:39:03 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E3E67C10F05 for ; Sun, 10 Dec 2023 10:28:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229712AbjLJK14 (ORCPT ); Sun, 10 Dec 2023 05:27:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60936 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229482AbjLJK1y (ORCPT ); Sun, 10 Dec 2023 05:27:54 -0500 Received: from zju.edu.cn (mail.zju.edu.cn [61.164.42.155]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 599D7FF for ; Sun, 10 Dec 2023 02:27:59 -0800 (PST) Received: from localhost.localdomain (unknown [10.192.120.142]) by mail-app2 (Coremail) with SMTP id by_KCgCnHNSkknVlObhtAA--.13346S4; Sun, 10 Dec 2023 18:27:53 +0800 (CST) From: Dinghao Liu To: dinghao.liu@zju.edu.cn Cc: Vishal Verma , Dan Williams , Dave Jiang , Ira Weiny , nvdimm@lists.linux.dev, linux-kernel@vger.kernel.org Subject: [PATCH] nvdimm-btt: simplify code with the scope based resource management Date: Sun, 10 Dec 2023 18:27:47 +0800 Message-Id: <20231210102747.13545-1-dinghao.liu@zju.edu.cn> X-Mailer: git-send-email 2.17.1 X-CM-TRANSID: by_KCgCnHNSkknVlObhtAA--.13346S4 X-Coremail-Antispam: 1UD129KBjvJXoW7uF45ZFWkKw4fCF1DJry8uFg_yoW8Gw4xpF s8A34DArZ8JF1xCF1DCa17u343Ga1fA34UKFyjk39avFW3tw1jqrWktFyS9rykurWIvry3 KrWjywn0kF45AF7anT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUka1xkIjI8I6I8E6xAIw20EY4v20xvaj40_Wr0E3s1l1IIY67AE w4v_Jr0_Jr4l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28EF7xvwVC0I7IYx2 IY67AKxVWDJVCq3wA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr1UM28EF7xvwVC2 z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0DM2AIxVAIcxkEcV Aq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1j 6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64 vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7MxAIw28IcxkI7VAKI48JMxAIw28IcVCjz48v 1sIEY20_GFWkJr1UJwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v26r1j6r 18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_JF0_Jw1lIxkGc2Ij64vI r41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY6xIIjxv20xvEc7CjxVAFwI0_Jr0_Gr 1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r1j6r4UMIIF0xvE x4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUdHUDUUUUU= X-CM-SenderInfo: qrrzjiaqtzq6lmxovvfxof0/1tbiAgsFBmV0OhUYjwABsi Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Use the scope based resource management (defined in linux/cleanup.h) to automate resource lifetime control on struct btt_sb *super in discover_arenas(). Signed-off-by: Dinghao Liu --- drivers/nvdimm/btt.c | 12 ++++-------- 1 file changed, 4 insertions(+), 8 deletions(-) diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c index d5593b0dc700..ff42778b51de 100644 --- a/drivers/nvdimm/btt.c +++ b/drivers/nvdimm/btt.c @@ -16,6 +16,7 @@ #include #include #include +#include #include "btt.h" #include "nd.h" =20 @@ -847,7 +848,7 @@ static int discover_arenas(struct btt *btt) { int ret =3D 0; struct arena_info *arena; - struct btt_sb *super; + struct btt_sb *super __free(kfree) =3D NULL; size_t remaining =3D btt->rawsize; u64 cur_nlba =3D 0; size_t cur_off =3D 0; @@ -860,10 +861,8 @@ static int discover_arenas(struct btt *btt) while (remaining) { /* Alloc memory for arena */ arena =3D alloc_arena(btt, 0, 0, 0); - if (!arena) { - ret =3D -ENOMEM; - goto out_super; - } + if (!arena) + return -ENOMEM; =20 arena->infooff =3D cur_off; ret =3D btt_info_read(arena, super); @@ -919,14 +918,11 @@ static int discover_arenas(struct btt *btt) btt->nlba =3D cur_nlba; btt->init_state =3D INIT_READY; =20 - kfree(super); return ret; =20 out: kfree(arena); free_arenas(btt); - out_super: - kfree(super); return ret; } =20 --=20 2.17.1