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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 89382C433EF for ; Tue, 17 May 2022 04:11:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231180AbiEQELu (ORCPT ); Tue, 17 May 2022 00:11:50 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47556 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235688AbiEQELq (ORCPT ); Tue, 17 May 2022 00:11:46 -0400 Received: from mail-yw1-x1129.google.com (mail-yw1-x1129.google.com [IPv6:2607:f8b0:4864:20::1129]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A77A34507B for ; Mon, 16 May 2022 21:11:44 -0700 (PDT) Received: by mail-yw1-x1129.google.com with SMTP id 00721157ae682-2fedd26615cso61884827b3.7 for ; Mon, 16 May 2022 21:11:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=NO/qVr25gl9DWObhrjxNHN1PGGWIrTbPudg44b/JLeI=; b=6KEbpLl+WAWuaT8l95JqbSOJgxSfJpLNEobjxxcKridU4U1e87XUTvnUWU6odxyltG sXCcYvAJY+6YB1DpztmiFEnawZUnjEhrpZdrVqDMMN1cGgA1leE+uGdC2eL9FIQFSPdB xEO8+E2C/VI8ufjhzynb2Z+cjaYGHRHv3EiZaE0UgmgXsHBuI952bSfrr9GwiudXZovw CVqHc0o16YBvjIQ9aiw2/bi+cIfUuynJXbTcERUtjLZy+1Zd8Een7qt0NcebDbVycA6i 4xth0GFVrEk/CoU07cQjxYG1M9u2NZERL1P5PXhcCQ6ywkbKUWXRQHnHLustaralGwoS 2tXg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=NO/qVr25gl9DWObhrjxNHN1PGGWIrTbPudg44b/JLeI=; b=gss9NKENX7QWPoFoVnLiATU1sdhXn+lZGrVyms1Y4vVBv0pJjdsQBtDpWBuGkbFakC cWYQ3G2liPkKRKiJF5h50P0P6LFSkbJFJ78Zu9n8WV9rLp8+h8SP398e/YHwNZXrVSBG 2OumIYOmAgsdvbHjQlJ97H0EKJSL0aOXVt6bPKhnreKE+R3E/I3w3XUwPu1IFLupuiRZ uNUQc7/NcY2+oTx/atbmjBHCF7G3GcOaGsLUPotMQNywxr0tLPRTyVJNSKT+RUNr0LN1 YsTYJ7MDUMkjH4GSe17aXFxcwq9lLPNIWnUE0wD3kN/x1BuIJZDXP1U6mIxU4AldhPWK 31oA== X-Gm-Message-State: AOAM533H/E1a+pB6q86NL6gZY+9Xfu+UuNMKYChB+WIzJB9fZtVmOSN/ irUmq4K8DvxZ7NUU7dyFph3rO+ziB4cUb1PDnzJYgg== X-Google-Smtp-Source: ABdhPJw94mquCu2tzO4e+v+R3EKZQm+TzZ6hT1GPqsmlWqCmuAgQDMm/rqRAJ7UuVR8eO1d1Omo9W844ZRuDq2Cs1+Q= X-Received: by 2002:a81:7b05:0:b0:2f4:e45a:b06e with SMTP id w5-20020a817b05000000b002f4e45ab06emr23607287ywc.458.1652760704159; Mon, 16 May 2022 21:11:44 -0700 (PDT) MIME-Version: 1.0 References: <20220516173930.159535-1-bh1scw@gmail.com> In-Reply-To: <20220516173930.159535-1-bh1scw@gmail.com> From: Muchun Song Date: Tue, 17 May 2022 12:11:08 +0800 Message-ID: Subject: Re: [PATCH] blk-cgroup: Remove unnecessary rcu_read_lock/unlock() To: bh1scw@gmail.com Cc: Tejun Heo , Jens Axboe , Cgroups , "open list:BLOCK LAYER" , LKML Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, May 17, 2022 at 1:39 AM wrote: > > From: Fanjun Kong > > spin_lock_irq/spin_unlock_irq contains preempt_disable/enable(). > Which can serve as RCU read-side critical region, so remove > rcu_read_lock/unlock(). > > Signed-off-by: Fanjun Kong Reviewed-by: Muchun Song Thanks.