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=-5.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 78EDFC35646 for ; Fri, 21 Feb 2020 15:26:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5064A20722 for ; Fri, 21 Feb 2020 15:26:01 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="f2oIImdH" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729253AbgBUPZ7 (ORCPT ); Fri, 21 Feb 2020 10:25:59 -0500 Received: from mail-wr1-f65.google.com ([209.85.221.65]:38481 "EHLO mail-wr1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729062AbgBUPZ7 (ORCPT ); Fri, 21 Feb 2020 10:25:59 -0500 Received: by mail-wr1-f65.google.com with SMTP id e8so2504699wrm.5 for ; Fri, 21 Feb 2020 07:25:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=39vzs+3PR2IOAxB8jmugcd50CTjNopkio/uzevne96U=; b=f2oIImdHZZlJrf4QHfYkk3mMK7o3ckEtdPUU2722QhXaVU6o3aLKEaGiNi0BoT5xZN 1R9UmWWAYMeKAPihOLUQbRIIjw2dePaz0Rxr4rZ59/Jj0xwPAJfrZcc95Yuoc4G0YZ6J CtVZtZNkO8sjJqFetUCc2aSA4egpHYYOhRt3+8PhfH813kRoWrVfjMBwXNMV11Of0lmX mdOy1CzxNagrlstbUWAxXXsM+kt5Io5UwxX8NNQJ2f5hM81+ufcEnpTZ3zkY+nBVawMZ m15eWZWtwJ+CYorGk9zuCo5CDmlIK2JptPpm3KaxdU9aQGgrjRJco70p5PJE0TyD1cCM oQDQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=39vzs+3PR2IOAxB8jmugcd50CTjNopkio/uzevne96U=; b=LZGITm67XFmrxU7WvDnojooHtz/cyvDrquXWw79zGJPhSoL62rmDXIgbFf5i1519FF dC8GAwtOthH3pRT7cEdDDYKur4dETH1UpWLNLVMbXk/1s7A6SM863M6+SicLuEPxIY1p SG4IW658S61S1zIp++L30pullZYnRHkvu5KnbSBuScD/OWFXke4ssPqEL0ceAkVnjQG0 KM/VrJuS523psDok9Cn0MXs7kzGlpKABV9VwBqE63ns53YjteEEjwygO9MLt5NT7o607 AEFXZwWZTPop9gWntJsbnFq8yzaDT+1NhEi2RXdNYGEsxLNktsbkv87q7wulz7QvLVaQ gR9A== X-Gm-Message-State: APjAAAW3RZ3vxQeHKuFD6oTZkjZc3vqRqQuS+6qXasHQD0DgOXfFTweL NR8sKuGfoMthF2Z3wmDNVpxgMg== X-Google-Smtp-Source: APXvYqyJr8NTGiJQQEABfUSMNuPSEiSl7ArQY9B3ZpVk3cNArch9dZNZYuAjxmpIHDOpFQHfSlyZUQ== X-Received: by 2002:a5d:4e0a:: with SMTP id p10mr52112615wrt.229.1582298757617; Fri, 21 Feb 2020 07:25:57 -0800 (PST) Received: from linaro.org ([2a01:e34:ed2f:f020:903b:a048:f296:e3ae]) by smtp.gmail.com with ESMTPSA id d9sm4384193wrx.94.2020.02.21.07.25.56 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Fri, 21 Feb 2020 07:25:57 -0800 (PST) Date: Fri, 21 Feb 2020 16:25:54 +0100 From: Daniel Lezcano To: Dmitry Osipenko Cc: Thierry Reding , Jonathan Hunter , Peter De Schrijver , "Rafael J. Wysocki" , =?utf-8?B?TWljaGHFgiBNaXJvc8WCYXc=?= , Jasper Korten , David Heidelberg , Peter Geis , linux-pm@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v9 11/17] arm: tegra20/30: cpuidle: Remove unnecessary memory barrier Message-ID: <20200221152554.GN10516@linaro.org> References: <20200212235134.12638-1-digetx@gmail.com> <20200212235134.12638-12-digetx@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200212235134.12638-12-digetx@gmail.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 13, 2020 at 02:51:28AM +0300, Dmitry Osipenko wrote: > There is no good justification for smp_rmb() after returning from LP2 > because there are no memory operations that require SMP synchronization. > Thus remove the confusing barrier. > > Acked-by: Peter De Schrijver > Tested-by: Peter Geis > Tested-by: Jasper Korten > Tested-by: David Heidelberg > Signed-off-by: Dmitry Osipenko Acked-by: Daniel Lezcano