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=-6.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_1 autolearn=no 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 AC1BDC2D0A8 for ; Mon, 28 Sep 2020 09:34:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 56BCA221E8 for ; Mon, 28 Sep 2020 09:34:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="RicP1dh7" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726691AbgI1Je2 (ORCPT ); Mon, 28 Sep 2020 05:34:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50824 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726605AbgI1Je2 (ORCPT ); Mon, 28 Sep 2020 05:34:28 -0400 Received: from mail-ed1-x543.google.com (mail-ed1-x543.google.com [IPv6:2a00:1450:4864:20::543]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B988FC0613D0 for ; Mon, 28 Sep 2020 02:34:27 -0700 (PDT) Received: by mail-ed1-x543.google.com with SMTP id c8so550066edv.5 for ; Mon, 28 Sep 2020 02:34:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=subject:to:cc:references:from:message-id:date:user-agent :mime-version:in-reply-to; bh=lZqzCSVt3S1CiP/YuaMmxdt13EbW8E+LTE5IYmnrpLM=; b=RicP1dh7OsY2BRBnrr7YpKJ0G/ir0qivAsa+V13mWDgQXivv2zTKU3pgJLmd5tSj6o Yt02nO2Foingbem0YPGUzu0i/NPar05eCikYm/pThECQo8NOcgQ/jy/Ohz29FtuI10cw sPczJZECWqn5LiBQ0jcqSD52vuSGShk0Uslxc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:message-id:date :user-agent:mime-version:in-reply-to; bh=lZqzCSVt3S1CiP/YuaMmxdt13EbW8E+LTE5IYmnrpLM=; b=fRZWzJdZtkdciGN/5wnzaTiXn0V41nKuYeOOeJJGbquTJxfHNjvwj2V8hUzhodAoXD 7N6T5kc+s+w5hotyso4FWRPyyYXfsaCjmP/W17a/EaCH2UL3NRuQHGCU+nwj8idikkoe 7bHHXgOlBmkfFIEpkv829CYU+NzzSuL6KbMY7U1AS1SUQ4uxtTjq6ou0Bd0ZwoO513Fl w6T8NZLLgUiWeP6O3x7nR0A5//z9bwDPGOaSimacUomoCNO/nwE8zwNWtIHeu2sgFdCy qfVg8lt9xI5I2QL68Eqa7hGDwWGaJrOLnxM6m2TIWYe7LZQFM455wMNnROiC9Z2yj1Fn XjJg== X-Gm-Message-State: AOAM532picMs9i1aeYHUE5lxN5hixSpalSqTusCLsGfa++TSTos3WIxg 1x+IXK5Zqy46Q2TIrNv/GRL49w== X-Google-Smtp-Source: ABdhPJwLDeJj4eSk8uCB1OX9YbqIcFxfFwM4PQfEsdndLGRL1iNd0nKdibOIpORZF7Zw/2JGQ65ojA== X-Received: by 2002:a50:f199:: with SMTP id x25mr645312edl.347.1601285665899; Mon, 28 Sep 2020 02:34:25 -0700 (PDT) Received: from [192.168.178.129] (f140230.upc-f.chello.nl. [80.56.140.230]) by smtp.gmail.com with ESMTPSA id t10sm635029edw.86.2020.09.28.02.34.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 28 Sep 2020 02:34:24 -0700 (PDT) Subject: Re: [patch 26/35] net: brcmfmac: Convey allocation mode as argument To: Thomas Gleixner , LKML Cc: Peter Zijlstra , Linus Torvalds , Paul McKenney , Matthew Wilcox , Sebastian Andrzej Siewior , Franky Lin , Hante Meuleman , Chi-Hsien Lin , Wright Feng , Kalle Valo , "David S. Miller" , Jakub Kicinski , linux-wireless@vger.kernel.org, brcm80211-dev-list.pdl@broadcom.com, brcm80211-dev-list@cypress.com, netdev@vger.kernel.org, Christian Benvenuti , Govindarajulu Varadarajan <_govind@gmx.com>, Jonathan Corbet , Mauro Carvalho Chehab , linux-doc@vger.kernel.org, Luc Van Oostenryck , Jay Cliburn , Chris Snook , Vishal Kulkarni , Jeff Kirsher , intel-wired-lan@lists.osuosl.org, Shannon Nelson , Pensando Drivers , Andrew Lunn , Heiner Kallweit , Russell King , Thomas Bogendoerfer , Solarflare linux maintainers , Edward Cree , Martin Habets , Jon Mason , Daniel Drake , Ulrich Kunitz , linux-usb@vger.kernel.org, Greg Kroah-Hartman , Stanislav Yakovlev , Stanislaw Gruszka , Johannes Berg , Emmanuel Grumbach , Luca Coelho , Intel Linux Wireless , Jouni Malinen , Amitkumar Karwar , Ganapathi Bhat , Xinming Hu , libertas-dev@lists.infradead.org, Pascal Terjan , Ping-Ke Shih References: <20200927194846.045411263@linutronix.de> <20200927194922.444952084@linutronix.de> From: Arend Van Spriel Message-ID: Date: Mon, 28 Sep 2020 11:34:22 +0200 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.2.2 MIME-Version: 1.0 In-Reply-To: <20200927194922.444952084@linutronix.de> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000557e2b05b05c5f30" Precedence: bulk List-ID: X-Mailing-List: linux-usb@vger.kernel.org --000000000000557e2b05b05c5f30 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit On 9/27/2020 9:49 PM, Thomas Gleixner wrote: > From: Sebastian Andrzej Siewior > > The usage of in_interrupt() in drivers is phased out and Linus clearly > requested that code which changes behaviour depending on context should > either be seperated or the context be conveyed in an argument passed by the > caller, which usually knows the context. > > brcmf_fweh_process_event() uses in_interrupt() to select the allocation > mode GFP_KERNEL/GFP_ATOMIC. Aside of the above reasons this check is > incomplete as it cannot detect contexts which just have preemption or > interrupts disabled. > > All callchains leading to brcmf_fweh_process_event() can clearly identify > the calling context. Convey a 'gfp' argument through the callchains and let > the callers hand in the appropriate GFP mode. > > This has also the advantage that any change of execution context or > preemption/interrupt state in these callchains will be detected by the > memory allocator for all GFP_KERNEL allocations. Looking at the functions changed I see overlap with patch 25/35 so maybe change to gfp flag to a 'in_isr' bool. The flag can then be used for dealing with netif_rx as well. 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