From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1714DC43381 for ; Fri, 22 Mar 2019 17:16:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DAA7521900 for ; Fri, 22 Mar 2019 17:16:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1553274976; bh=NPONG8wAWdU8frpkBP04ZDC1Cm0k8bBvTC60p9VG0bk=; h=References:In-Reply-To:From:Date:Subject:To:Cc:List-ID:From; b=uroE0cQIwPTXa3aOuuFl11cwNUbR2jHDnLgc+jZZLtuqL8quuOTfeTnp1kc/aFaei lq0eXV0mHFQG8Jhj+6FLdQ92dIYjm8HgFvlwBRiFa/5yqruJZoQunQzk2F9D8yafWy tzaswaSn89toouLWAWXILQNmQBKHYI/ASmJFZhSQ= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728217AbfCVRQQ (ORCPT ); Fri, 22 Mar 2019 13:16:16 -0400 Received: from mail-lj1-f195.google.com ([209.85.208.195]:45028 "EHLO mail-lj1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727928AbfCVRQQ (ORCPT ); Fri, 22 Mar 2019 13:16:16 -0400 Received: by mail-lj1-f195.google.com with SMTP id n18so2651233ljg.11 for ; Fri, 22 Mar 2019 10:16:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=syf5FC/PD4cN6FgIJM2ms3RJG343jtrhSP64Oe75Sac=; b=IuhoI3hZaIxE4YvOC0/zFIRPXbZPqr4mch9fB87bJI50v/CesoGw5jPm0Ymj36S+8D SIzDojt4m/q1uwaK9P5Is2rLt7NY0cQwo3oRCrDKYwFF22+ZwEkj5rWc3XCpMkx/lh21 i/oyaRFuahvewUzvmGuDcKpmqMK2Pff6AsG6Q= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=syf5FC/PD4cN6FgIJM2ms3RJG343jtrhSP64Oe75Sac=; b=l6h7oeHXWdx9HBZmtQQZEVDoaRj3ST14EZVaNUW9Iis8tf2+vPd4liIsY1KFsP0Gan cCdEKXd2ZVbh1mA1SL9pnoY8kk143Q+bq/zZGNNo4ez5KJqGr+7s4Y5nS2BeH+K1Vm3Z SWtQ0wYQcoQLe7RgAQ3phjywzbgvjxMHF4G89KMpeXpAemePD2viNTLIgspP44IqcLhn MpCf/N/XiYUNyIKP/30I2mihdY+ZJy5mdI1b6W4cNFJgNLe0MwbplUBOtBfWHjqQ8Fnx EtC9ETP88Rwu2waWkKR1qrP3e0na2ElG5GNT40B3E23pl3z9GxuQnYRnwBtcCy1w9QUv 3qAg== X-Gm-Message-State: APjAAAWUR/O3P+TwOS0Wcw9Ik1jUhgKetZPmfXP5abl8ej8ixtXRN0SA 1bSharRLXneo8xrEj+A2Bz5JjliGMvk= X-Google-Smtp-Source: APXvYqzsZ2s9Bb0qu97QWt6XnPkvQWMVHjUAexnJQlZT1jm5FIB7fXZDUgZnHfRTCRD12Aam6u2Nkg== X-Received: by 2002:a2e:86ca:: with SMTP id n10mr5898274ljj.135.1553274973918; Fri, 22 Mar 2019 10:16:13 -0700 (PDT) Received: from mail-lj1-f179.google.com (mail-lj1-f179.google.com. [209.85.208.179]) by smtp.gmail.com with ESMTPSA id o3sm1835964lfd.53.2019.03.22.10.16.13 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 22 Mar 2019 10:16:13 -0700 (PDT) Received: by mail-lj1-f179.google.com with SMTP id t13so2693928lji.2 for ; Fri, 22 Mar 2019 10:16:13 -0700 (PDT) X-Received: by 2002:a2e:86ca:: with SMTP id n10mr5880284ljj.135.1553274524897; Fri, 22 Mar 2019 10:08:44 -0700 (PDT) MIME-Version: 1.0 References: <20190322143008.21313-1-longman@redhat.com> <20190322143008.21313-4-longman@redhat.com> In-Reply-To: <20190322143008.21313-4-longman@redhat.com> From: Linus Torvalds Date: Fri, 22 Mar 2019 10:08:29 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v5 3/3] locking/rwsem: Optimize down_read_trylock() To: Waiman Long Cc: Peter Zijlstra , Ingo Molnar , Will Deacon , Thomas Gleixner , Linux List Kernel Mailing , "linux-alpha@vger.kernel.org" , "linux-alpha@vger.kernel.org" , linux-c6x-dev@linux-c6x.org, uclinux-h8-devel@lists.sourceforge.jp, linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k , linux-mips@vger.kernel.org, nios2-dev@lists.rocketboards.org, openrisc@lists.librecores.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, Linux-sh list , sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org, linux-arch , "the arch/x86 maintainers" , Arnd Bergmann , Borislav Petkov , "H. Peter Anvin" , Davidlohr Bueso , Andrew Morton , Tim Chen Content-Type: text/plain; charset="UTF-8" Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org On Fri, Mar 22, 2019 at 7:30 AM Waiman Long wrote: > > Modify __down_read_trylock() to optimize for an unlocked rwsem and make > it generate slightly better code. Oh, that should teach me to read all patches in the series before starting to comment on them. So ignore my comment on #1. Linus