From patchwork Fri Jun 7 04:24:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhihao Cheng X-Patchwork-Id: 1944838 X-Patchwork-Delegate: david.oberhollenzer@sigma-star.at Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (2048-bit key; secure) header.d=lists.infradead.org header.i=@lists.infradead.org header.a=rsa-sha256 header.s=bombadil.20210309 header.b=HOEvdH9i; dkim-atps=neutral Authentication-Results: legolas.ozlabs.org; spf=none (no SPF record) smtp.mailfrom=lists.infradead.org (client-ip=2607:7c80:54:3::133; helo=bombadil.infradead.org; envelope-from=linux-mtd-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org; receiver=patchwork.ozlabs.org) Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (secp384r1) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4VwSqc64Lsz20Q5 for ; Fri, 7 Jun 2024 14:28:12 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:CC:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=v2PIjtWivF8qtgLCnqi0qLvzrg/PRrObF1The0Jx5F8=; b=HOEvdH9inDE1gh fSR310Sf9HrVZbvPvCl7A9ou/kf6DvX44z+2bTXFg7jxhYjxTOv/gWtgQpfTATsYsNwp+b74Plxwv UrxUyESCK+AgVFvg0xcxV/7YDC2T0+ReknlM2i54SxhgOVSLT2/3Fb5ApBHre605+n/+xCvDSGVPx oNIcyncpqGKzo0RKUaz9Y+ztvJIxecTXHqr26ohr/PzJCel/aycgjAK/OX641uv3qPvFbbj+okrOY z5VPIoQp4D9mLEDqV8bhWrmHh/ROGXdJFtBGJJoHEGEOBanjWz1tXv4/I8zzPI1mw2T9lZlxJt/JA SG1fuN9KTEXq8uB8kzsg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sFRCt-0000000CHBE-3lea; Fri, 07 Jun 2024 04:28:03 +0000 Received: from szxga02-in.huawei.com ([45.249.212.188]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sFRBr-0000000CGH9-3TQv for linux-mtd@lists.infradead.org; Fri, 07 Jun 2024 04:27:10 +0000 Received: from mail.maildlp.com (unknown [172.19.88.194]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4VwShm0VlHzmYTL; Fri, 7 Jun 2024 12:22:16 +0800 (CST) Received: from kwepemm600013.china.huawei.com (unknown [7.193.23.68]) by mail.maildlp.com (Postfix) with ESMTPS id DE10A14038F; Fri, 7 Jun 2024 12:26:51 +0800 (CST) Received: from huawei.com (10.175.104.67) by kwepemm600013.china.huawei.com (7.193.23.68) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.39; Fri, 7 Jun 2024 12:26:46 +0800 From: Zhihao Cheng To: , , , , , CC: , Subject: [RFC PATCH mtd-utils 027/110] ubifs-utils: Add rwsem implementations Date: Fri, 7 Jun 2024 12:24:52 +0800 Message-ID: <20240607042615.2069840-28-chengzhihao1@huawei.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240607042615.2069840-1-chengzhihao1@huawei.com> References: <20240607042615.2069840-1-chengzhihao1@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.175.104.67] X-ClientProxiedBy: dggems706-chm.china.huawei.com (10.3.19.183) To kwepemm600013.china.huawei.com (7.193.23.68) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240606_212700_568250_E9FF44EE X-CRM114-Status: GOOD ( 11.40 ) X-Spam-Score: -2.3 (--) X-Spam-Report: Spam detection software, running on the system "bombadil.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Add rwsem implementations, because there are some rwsems (eg. c->commit_sem) used in UBIFS linux kernel libs. The rwsem is implementated based on pthread mutex. This is a preparation for replacing implementation of UBIFS utils with linux kernel libs. 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The rwsem is implementated based on pthread mutex. This is a preparation for replacing implementation of UBIFS utils with linux kernel libs. Signed-off-by: Zhihao Cheng --- ubifs-utils/Makemodule.am | 1 + ubifs-utils/common/rwsem.h | 19 +++++++++++++++++++ 2 files changed, 20 insertions(+) create mode 100644 ubifs-utils/common/rwsem.h diff --git a/ubifs-utils/Makemodule.am b/ubifs-utils/Makemodule.am index 9f33f0db..ece8a6e9 100644 --- a/ubifs-utils/Makemodule.am +++ b/ubifs-utils/Makemodule.am @@ -7,6 +7,7 @@ common_SOURCES = \ ubifs-utils/common/bitops.c \ ubifs-utils/common/spinlock.h \ ubifs-utils/common/mutex.h \ + ubifs-utils/common/rwsem.h \ ubifs-utils/common/kmem.h \ ubifs-utils/common/kmem.c \ ubifs-utils/common/defs.h \ diff --git a/ubifs-utils/common/rwsem.h b/ubifs-utils/common/rwsem.h new file mode 100644 index 00000000..3761724b --- /dev/null +++ b/ubifs-utils/common/rwsem.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __LINUX_RWSEM_H_ +#define __LINUX_RWSEM_H_ + +#include + +struct rw_semaphore { + pthread_mutex_t lock; +}; + +#define init_rwsem(x) pthread_mutex_init(&(x)->lock, NULL) + +#define down_read(x) pthread_mutex_lock(&(x)->lock) +#define down_write(x) pthread_mutex_lock(&(x)->lock) +#define up_read(x) pthread_mutex_unlock(&(x)->lock) +#define up_write(x) pthread_mutex_unlock(&(x)->lock) +#define down_write_trylock(x) (pthread_mutex_trylock(&(x)->lock) == 0) + +#endif