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=-2.5 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,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 3D5A8C433E0 for ; Wed, 13 May 2020 18:39:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E2D9B205CB for ; Wed, 13 May 2020 18:39:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=broadcom.com header.i=@broadcom.com header.b="ewIInpz3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2389392AbgEMSjj (ORCPT ); Wed, 13 May 2020 14:39:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47272 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S2389733AbgEMSjj (ORCPT ); Wed, 13 May 2020 14:39:39 -0400 Received: from mail-wr1-x442.google.com (mail-wr1-x442.google.com [IPv6:2a00:1450:4864:20::442]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F13F5C05BD09 for ; Wed, 13 May 2020 11:39:38 -0700 (PDT) Received: by mail-wr1-x442.google.com with SMTP id l11so752967wru.0 for ; Wed, 13 May 2020 11:39:38 -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:content-transfer-encoding:content-language; bh=QevyPaB54vabz1NgQweuhMZ/4PP5dMX078Hx9aqjxfc=; b=ewIInpz3Jv/IrkCkWkGiBC6UAat93L2zYEJfVB/67p9YtVYuw3NEVn0LJQPhSBnoBR pZUumCJ55i5Nmpq7zEeDDK+k0WKMCo5B9vDp02gV9BZTg4fT1dN/flqFNi79peEEs67R mFiPZ7/V5n0/0I8UIXjKTwwVnG1krpdxHa9WI= 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:content-transfer-encoding :content-language; bh=QevyPaB54vabz1NgQweuhMZ/4PP5dMX078Hx9aqjxfc=; b=QOkDvmkYUPaaec0QEqPtZN+NXTOQXBYvreqYyfzAlrUMLLX6L+7Jnr5j9JknC/DYO4 8qQGR6DFfOu/MKv0zfRODQIp/JfpteieKg7N5/bmdxiYpC6nLJidBV1RsjyICQf0QZwd sHd2yDNzZRcoBzG+TtBuDuEQ4M2jXL6ge+vnf/c0/0QS/Z85hPOzIATUuNeIO+lp9L5K H9gTCprgBtovrWp/IMQIEqsabM9UYtlc8U8QNnkY7w/KLEg5vsM6OkmlLcWvVs0D5G92 oWAzWB6glXxYIdtnjvUA3oVGJtvuXtNFbV1HWtBQIuJ9MFzQzYu5bO9CmogWT3JCel1N WGhg== X-Gm-Message-State: AOAM532q8wDtOHeVPRcYZVkcojGi5cXAybfiruxXHfhiEg1KysS8vuB4 yZMhxoMoT+JAlwbw6FuezszGHw== X-Google-Smtp-Source: ABdhPJzhf+mYsAycvYoLOXU1WHfMH8XPnenYApwbY7dPsUsGlZ8N8UGzdao3+8+YZVroo8SME6sfvg== X-Received: by 2002:adf:e38b:: with SMTP id e11mr706640wrm.343.1589395177524; Wed, 13 May 2020 11:39:37 -0700 (PDT) Received: from [10.136.13.65] ([192.19.228.250]) by smtp.gmail.com with ESMTPSA id x24sm501774wrd.51.2020.05.13.11.39.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 13 May 2020 11:39:36 -0700 (PDT) Subject: Re: [PATCH v5 6/7] misc: bcm-vk: add Broadcom VK driver To: Luis Chamberlain , Greg Kroah-Hartman Cc: David Brown , Alexander Viro , Shuah Khan , bjorn.andersson@linaro.org, Shuah Khan , Arnd Bergmann , "Rafael J . Wysocki" , linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-fsdevel@vger.kernel.org, BCM Kernel Feedback , Olof Johansson , Andrew Morton , Dan Carpenter , Colin Ian King , Kees Cook , Takashi Iwai , linux-kselftest@vger.kernel.org, Andy Gross , Desmond Yan , James Hu References: <20200508002739.19360-1-scott.branden@broadcom.com> <20200508002739.19360-7-scott.branden@broadcom.com> <20200513003830.GJ11244@42.do-not-panic.com> <60372b2f-c03d-6384-43a7-8b97413b6672@broadcom.com> <20200513065046.GA764247@kroah.com> <20200513123033.GL11244@42.do-not-panic.com> From: Scott Branden Message-ID: <2eaa3047-4833-8d1c-d8c7-fc602468eae3@broadcom.com> Date: Wed, 13 May 2020 11:39:30 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200513123033.GL11244@42.do-not-panic.com> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Thanks for link. On 2020-05-13 5:30 a.m., Luis Chamberlain wrote: > On Wed, May 13, 2020 at 08:50:46AM +0200, Greg Kroah-Hartman wrote: >> On Tue, May 12, 2020 at 11:31:28PM -0700, Scott Branden wrote: >> >> That's not how kernel drivers in the tree work, sorry. They do not >> contain "older kernel support" in them, they work as a whole with the >> rest of the kernel they ship with only. >> >> Otherwise all drivers would be a total mess over time, can you imagine >> doing this for the next 20+ years? Not maintainable. > Scott, now imagine the amount of cleanup you'd need to do to your driver > to get it to a state where it doesn't depend on any old kernel. That's > the exact shape of the driver we want. > > To backport, you can look into the backports project which strives to > backport drivers automatically [0] to older kernels. > > [0] https://backports.wiki.kernel.org/index.php/Main_Page > > Luis Will drop legacy support from patch and look closer at this. Thanks,  Scott