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 741B0C433EF for ; Mon, 16 May 2022 18:42:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345058AbiEPSml (ORCPT ); Mon, 16 May 2022 14:42:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57552 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233865AbiEPSmk (ORCPT ); Mon, 16 May 2022 14:42:40 -0400 Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C688626577; Mon, 16 May 2022 11:42:39 -0700 (PDT) Received: by mail-pj1-x102d.google.com with SMTP id a23-20020a17090acb9700b001df4e9f4870so150081pju.1; Mon, 16 May 2022 11:42:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=Zfv6htmGomNEyvT4/mYlApRKn0/2gUiM5SY4HLzky7k=; b=GplBN0T/LVrKP/XISTvqaoVFkSl2pbtPN40wsW6anFajOkK7UTiSW3WGv0fnjcQtge 50XorcIu8S0HDAV9BOZSwbaYiFQnVa5Z/HJ1NMUKSbyNIe5ItCma/u68lCrb+4UPAjFl y9wPtaO5MeIIIbzcyH4iAFLA09Qk2UWDtvuvZp027Alp0lHKdAw4kemili37K0stSiR2 3d3352oB8pz/xXGjl4nFotNKezCb2+3/0ixz3zvuZft6aUqidrU/wRDgsiQJKAT/hW5x SRJkPGOsErEga1DSBQxzxT8bqsq8MC+l6DEqr1rI0j+d9R8R0kCwBDDMHHWJOhhaxM9F Y7CQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:date:from:to:cc:subject:message-id :references:mime-version:content-disposition:in-reply-to; bh=Zfv6htmGomNEyvT4/mYlApRKn0/2gUiM5SY4HLzky7k=; b=x0R4P8GefE1V+gpMDRfS3Q/yxr9+llQdhTR+cS75ZU+PJplTSAgfDbmGOLJyiVw8qu B1S7W84kEN85dBqQwlER9Q1K3NJpg7aBu8At/40/HI9dVkiBOn/CwMRh/38KCcin9pn0 8GxcjjgLjWAJD1FmeA2k6aL+3NTcw1g33QXhEaSlPb5KLxDsSBmhEbAK9Qo2m0dpszGi dPwn+d3c2Vg+L0buhYskW0h7XE1fCzWNVbq5FQnTNHHGKfsjU1dmSunrdppYs7hiyGts PZyxtZ1SuVUbDE0q+LAOUoQrLwUpgqP81B/2f7T5XxO53Zihjaxxv4eBp/oU+3kNFqwF 1wgg== X-Gm-Message-State: AOAM533KzRxOJFuj0bFWHijyQ4PM21Q7pZywPk8DxlL0GdRrepyxykYc h8uTyZaIjQVzKqwYFUKrEPg= X-Google-Smtp-Source: ABdhPJxxLmRRh4mwx4Je+VywjmM0/MA6lGqCCI7+JwRialjYsJhTyFP3bJxjcxAAUQbDGuX7/3+tDg== X-Received: by 2002:a17:90b:3e8b:b0:1dc:e920:e072 with SMTP id rj11-20020a17090b3e8b00b001dce920e072mr32380827pjb.151.1652726559218; Mon, 16 May 2022 11:42:39 -0700 (PDT) Received: from localhost ([2620:10d:c090:400::4:62fc]) by smtp.gmail.com with ESMTPSA id i9-20020a63e449000000b003c14af50622sm1789856pgk.58.2022.05.16.11.42.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 16 May 2022 11:42:38 -0700 (PDT) Sender: Tejun Heo Date: Mon, 16 May 2022 08:42:37 -1000 From: Tejun Heo To: bh1scw@gmail.com Cc: axboe@kernel.dk, cgroups@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, songmuchun@bytedance.com Subject: Re: [PATCH] blk-cgroup: Remove unnecessary rcu_read_lock/unlock() Message-ID: References: <20220516173930.159535-1-bh1scw@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220516173930.159535-1-bh1scw@gmail.com> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Tue, May 17, 2022 at 01:39:30AM +0800, bh1scw@gmail.com 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 Acked-by: Tejun Heo Thanks. -- tejun