From patchwork Thu Oct 12 12:20:46 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Will Deacon X-Patchwork-Id: 115614 Delivered-To: patch@linaro.org Received: by 10.140.22.163 with SMTP id 32csp1876231qgn; Thu, 12 Oct 2017 05:22:05 -0700 (PDT) X-Google-Smtp-Source: AOwi7QCczprRZjWivNRl+XJkqjvNcJUnTO4E5W3C9qKYY79ZC10QnMCathgGxmIzWythkDpiwYBW X-Received: by 10.159.234.73 with SMTP id c9mr88520plr.3.1507810925482; Thu, 12 Oct 2017 05:22:05 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1507810925; cv=none; d=google.com; s=arc-20160816; b=WF4aSY645OmztRbkkA4KbP1LdCIul+Gbq22wogAPs8jVCvcppGxq2GoDfsH+ZBxP03 xC7HsdMV4eylxTYSrsd2yDNKhMAX1BfaPcpAgvfwDp4X/s+svulcPXV6jyObbqvdLOIw 2+GygtOJwyd1uoiMTBbVB4lF64lAHH3U0THvmYqxBDnaIBu1iBvh9id/D0cYDZihbrqJ /9ATv1hTlKTS1LPyoaUWpXCnnBpznyP1IBcOzY3p41rvKHpikSVs6Z7f4Ww7SeTMmFkx 4bHe3vcMQ5Crv3x9WnFjJGeHVUgYfchpMEz+sEpD3ArJX0RZUk8f0Hh53BKz05Xz4tTm W5Ww== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from :arc-authentication-results; bh=GkSxUob+yGDhak/DYMoSFrIU07QgHz9fw/vpbKgvR0A=; b=V+sw4d0eHfVvUiaEsSdN4ccn0gu9qfdaodK9eU2ZELivRyXh8i4GQq0qKZDcpM8cVg CHJv62Enak+I8Y9Hni3toJZkFV3zJUWgDWIDO93ZADsSFENQpH0HArp/dHGWuKbWzEF9 ySRMorFARNidgAvwkhKy4l1A9nrucOS0LgJn8/SjnqudsibvmMl30zOLojfg2RM4lA/S KxjUSkiX8XNKVmLZ4ZPT9oiYit7njTs+PsIqPBmAWgN1TMg3OU5WktQpgnontF9Ipge6 ZQc7oIh/ylz01cboXXWTyLkCkRO7SRfy3jdoW4i3/f/Cs8DIwlaWO8GwqRzruqASD2PO CBqA== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id z7si7418476pgp.424.2017.10.12.05.22.05; Thu, 12 Oct 2017 05:22:05 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757504AbdJLMWD (ORCPT + 27 others); Thu, 12 Oct 2017 08:22:03 -0400 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:45512 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756879AbdJLMUt (ORCPT ); Thu, 12 Oct 2017 08:20:49 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 89AED1435; Thu, 12 Oct 2017 05:20:48 -0700 (PDT) Received: from edgewater-inn.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 5A46B3F599; Thu, 12 Oct 2017 05:20:48 -0700 (PDT) Received: by edgewater-inn.cambridge.arm.com (Postfix, from userid 1000) id 107801AE2E09; Thu, 12 Oct 2017 13:20:52 +0100 (BST) From: Will Deacon To: linux-kernel@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, Jeremy.Linton@arm.com, peterz@infradead.org, mingo@redhat.com, longman@redhat.com, boqun.feng@gmail.com, paulmck@linux.vnet.ibm.com, Will Deacon Subject: [PATCH v3 0/5] Switch arm64 over to qrwlock Date: Thu, 12 Oct 2017 13:20:46 +0100 Message-Id: <1507810851-306-1-git-send-email-will.deacon@arm.com> X-Mailer: git-send-email 2.1.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, This is version three of the patches previously posted here: v1: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-October/534666.html v2: http://lists.infradead.org/pipermail/linux-arm-kernel/2017-October/534981.html Changes since v2 include: * Drop unused cnt argument * Fix typo in UNLOCK Kconfig inlining options * Added Tested-by tags Thanks to all of those who provided review and testing feedback! Will --->8 Will Deacon (5): kernel/locking: Use struct qrwlock instead of struct __qrwlock locking/atomic: Add atomic_cond_read_acquire kernel/locking: Use atomic_cond_read_acquire when spinning in qrwlock arm64: locking: Move rwlock implementation over to qrwlocks kernel/locking: Prevent slowpath writers getting held up by fastpath arch/arm64/Kconfig | 17 ++++ arch/arm64/include/asm/Kbuild | 1 + arch/arm64/include/asm/spinlock.h | 164 +------------------------------- arch/arm64/include/asm/spinlock_types.h | 6 +- include/asm-generic/atomic-long.h | 3 + include/asm-generic/qrwlock.h | 37 ++----- include/asm-generic/qrwlock_types.h | 15 ++- include/linux/atomic.h | 4 + kernel/locking/qrwlock.c | 86 +++-------------- 9 files changed, 61 insertions(+), 272 deletions(-) -- 2.1.4 Tested-by: Adam Wallis