From patchwork Thu Sep 7 17:47:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Matthew Wilcox (Oracle)" X-Patchwork-Id: 13376750 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 394E2EC874C for ; Thu, 7 Sep 2023 17:48:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245422AbjIGRsH (ORCPT ); Thu, 7 Sep 2023 13:48:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49062 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245444AbjIGRrp (ORCPT ); Thu, 7 Sep 2023 13:47:45 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CFD861990; Thu, 7 Sep 2023 10:47:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:In-Reply-To:References; bh=ykzxARVy4uCl6EJxalPtEu7KNDbQwm8SXBvTZkNjJPY=; b=Njpcz/IyQT0fdTQWkzaJwynKDt grfkwXy3awyPXJF2veO4UspVoBdf27UlM1dayYrxsB7RWqjm/4wW0bVokj3a0NfREiAqZuD+7JDod ScEIUkk8Y85CrX4Xtl1GdJH+R3GfOe6dpsa+8PPxQGtMdeOuEex8hcbGDH0+6h1cll2+MwNfpPq8y 1Yn7d1t5yrWkwrY321FIn/1Voclkp/cF9kfNfa/OiVG2qmhQDxiJRn2ysBx8aT4CNYBGuA8bKO5b0 +aI1t/4evcLGsE4QMu6NkKrbXezfOVVkVjA4u5A3aq96G/1NCyspCs2LiZRAs6Efbh39ks4he24eK TUww7iug==; Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1qeJ5v-00CUFH-Ai; Thu, 07 Sep 2023 17:47:07 +0000 From: "Matthew Wilcox (Oracle)" To: Peter Zijlstra , Ingo Molnar , Will Deacon , Waiman Long Cc: "Matthew Wilcox (Oracle)" , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Chandan Babu R , "Darrick J . Wong" , linux-xfs@vger.kernel.org Subject: [PATCH 0/5] Remove the XFS mrlock Date: Thu, 7 Sep 2023 18:47:00 +0100 Message-Id: <20230907174705.2976191-1-willy@infradead.org> X-Mailer: git-send-email 2.37.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-xfs@vger.kernel.org XFS has an mrlock wrapper around the rwsem which adds only the functionality of knowing whether the rwsem is currently held in read or write mode. Both regular rwsems and rt-rwsems know this, they just don't expose it as an API. By adding that, we can remove the XFS mrlock as well as improving the debug assertions for the mmap_lock when lockdep is disabled. I'd like acks from the locking people, then it probably should go upstream through the XFS tree since that's where the patch series touches the most code. Matthew Wilcox (Oracle) (5): locking: Add rwsem_is_write_locked() mm: Use rwsem_is_write_locked in mmap_assert_write_locked xfs: Use rwsem_is_write_locked() xfs: Remove mrlock wrapper xfs: Stop using lockdep to assert that locks are held fs/xfs/mrlock.h | 78 --------------------------------------- fs/xfs/xfs_inode.c | 61 ++++++++++-------------------- fs/xfs/xfs_inode.h | 2 +- fs/xfs/xfs_iops.c | 4 +- fs/xfs/xfs_linux.h | 2 +- fs/xfs/xfs_super.c | 4 +- include/linux/mmap_lock.h | 2 +- include/linux/rwbase_rt.h | 5 +++ include/linux/rwsem.h | 10 +++++ 9 files changed, 40 insertions(+), 128 deletions(-) delete mode 100644 fs/xfs/mrlock.h