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=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 AF373C4360C for ; Fri, 4 Oct 2019 21:51:44 +0000 (UTC) Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 6901520873 for ; Fri, 4 Oct 2019 21:51:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6901520873 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=vt.edu Authentication-Results: mail.kernel.org; spf=fail smtp.mailfrom=kernelnewbies-bounces@kernelnewbies.org Received: from localhost ([::1] helo=shelob.surriel.com) by shelob.surriel.com with esmtp (Exim 4.92.2) (envelope-from ) id 1iGVU1-0002RK-7z; Fri, 04 Oct 2019 17:51:29 -0400 Received: from omr1.cc.ipv6.vt.edu ([2607:b400:92:8300:0:c6:2117:b0e] helo=omr1.cc.vt.edu) by shelob.surriel.com with esmtps (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.92.2) (envelope-from ) id 1iGVTz-0002RE-MU for kernelnewbies@kernelnewbies.org; Fri, 04 Oct 2019 17:51:27 -0400 Received: from mr1.cc.vt.edu (inbound.smtp.ipv6.vt.edu [IPv6:2607:b400:92:9:0:9d:8fcb:4116]) by omr1.cc.vt.edu (8.14.4/8.14.4) with ESMTP id x94LpPo2015248 for ; Fri, 4 Oct 2019 17:51:26 -0400 Received: from mail-qk1-f198.google.com (mail-qk1-f198.google.com [209.85.222.198]) by mr1.cc.vt.edu (8.14.7/8.14.7) with ESMTP id x94LpKgM031493 for ; Fri, 4 Oct 2019 17:51:25 -0400 Received: by mail-qk1-f198.google.com with SMTP id b67so7932733qkc.1 for ; Fri, 04 Oct 2019 14:51:25 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:in-reply-to:references :mime-version:content-transfer-encoding:date:message-id; bh=pX1yaODNlWUvTculbw4H1WmLL/T/hGr1r5YGzo9ldaY=; b=uCIenlAGdNvYjA5aSTh4OiX+frH+nQZuAEirWdBayyJaGO2Q5yHgol+7GwTHdpUqsK fOHOflL/rXKMK7IpOpYLF7IaXZUFjy5nSzJHKOcSM/sLGvIIxiNz0uyH09VinKiLGrq6 x/pUZjxI4oN+dmccPGEx6LW24AVfu6WpaCLTRADQlYwV7rw6dHxXY2G3+TeXhTTM4tox pU5ClF/HNgE+TvkMNrUrrQj/KvOZorTiPWpH4yFDoEL5TUZk0MfJYi9DHrvjvW2zu72q YE7qyrUGMZgcN19b/PEkNpYiPNJmfKXaFDyFtQ1Cq7UbMaEF+4Ca0BNaFL5QDXFt40xK BLdA== X-Gm-Message-State: APjAAAUo82oEWDYR2Q1Q2MpX/QeqsKFZ4sb8dqyOPAfmAqgWgO0e5KN8 VkWAKU2rOE0+7aI/xfn+Ca2lTTs/6YcvC8R47dKk+Nlm14CUBKM/WHJVhegboL4bbihGBEVgX0v nMMxPCuWSEMXwqJKJgJrXy5QMtkFADaQ/bw7B9YU= X-Received: by 2002:a37:68d0:: with SMTP id d199mr12560355qkc.174.1570225880419; Fri, 04 Oct 2019 14:51:20 -0700 (PDT) X-Google-Smtp-Source: APXvYqyWP91TlISwB1UwOQB+YWVRYTr/is9SzYuYGnd/mud6PHjQYm6lsDWEvNK0glUM2+kY2ZYgPQ== X-Received: by 2002:a37:68d0:: with SMTP id d199mr12560331qkc.174.1570225880082; Fri, 04 Oct 2019 14:51:20 -0700 (PDT) Received: from turing-police ([2601:5c0:c001:4341::9ca]) by smtp.gmail.com with ESMTPSA id b192sm3556598qkg.39.2019.10.04.14.51.18 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Oct 2019 14:51:18 -0700 (PDT) From: "Valdis Kl=?utf-8?Q?=c4=93?=tnieks" X-Google-Original-From: "Valdis Kl=?utf-8?Q?=c4=93?=tnieks" X-Mailer: exmh version 2.9.0 11/07/2018 with nmh-1.7+dev To: Luca Ceresoli Subject: Re: Remote I/O bus In-Reply-To: <442abb4b-3812-713c-67e9-9e76c45205e8@lucaceresoli.net> References: <20191004132210.GA714804@kroah.com> <9f619831-f27e-447e-42ea-69227f7a31d0@lucaceresoli.net> <20191004145435.GA758347@kroah.com> <442abb4b-3812-713c-67e9-9e76c45205e8@lucaceresoli.net> Mime-Version: 1.0 Date: Fri, 04 Oct 2019 17:51:17 -0400 Message-ID: <154634.1570225877@turing-police> Cc: Greg KH , kernelnewbies@kernelnewbies.org X-BeenThere: kernelnewbies@kernelnewbies.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Learn about the Linux kernel List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============8837658366492939303==" Errors-To: kernelnewbies-bounces@kernelnewbies.org --===============8837658366492939303== Content-Type: multipart/signed; boundary="==_Exmh_1570225877_7127P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit --==_Exmh_1570225877_7127P Content-Type: text/plain; charset=us-ascii On Fri, 04 Oct 2019 17:08:30 +0200, Luca Ceresoli said: > Yes, the read/write helpers are nicely isolated. However this sits in a > vendor kernel that tends to change a lot from one release to another, so I admit having a hard time wrapping my head around "vendor kernel that changes a lot from one release to another", unless you mean something like the RedHat Enterprise releases that updates every 2 years, and at that point you get hit with a jump of 8 or 10 kernel releases. And of course, the right answer is to fix up the driver and upstream it, so that in 2022 when your vendor does a new release, the updated driver will already be there waiting for you. And don't worry about having to do patches to update the driver to a new kernel release because APIs change - that's only a problem for out-of-tree drivers. If it's in-tree, the person making the API change is supposed to fix your driver for you. --==_Exmh_1570225877_7127P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Comment: Exmh version 2.9.0 11/07/2018 iQIVAwUBXZe+1QdmEQWDXROgAQL98g/+Kkq/JxS/1d6e4Rdhnbr3mCbG5DiX7jk+ THjyeq/cBTO2PXrf8HgULffwFK+lb1DpVnEgabyryzY6LluEGNgb3neb47nDlP+e ZVuLUwq553WvZv1Kjgc6xewceSycP/TUrpfGreLzYpNoeAgSrF+Kb/GBWGEZ0i/T B1y0G33wz9ea15U7iT2p+rH/P6tfK0QkBJoJ6AeY9jCuthDtqpA1KQ5RmMWWTTeR 9Ah4MbXDXX6OBTDh32C/ijQ0y2umO5juYVCzWLzspQxgBkhxcFG75EIWxTSExffD xkyHUHG6ctj+eYAhqiei42wKODp89+6vvT99evDm67JGU7XraBPc1jNNuDGFJeD7 qhYcnHZKVvS87SwqXrBJAxVp0mn2SsG1Rkxiqdn/8S/Cf7Ui4n8ukS4VKBAydJIp bWDamUeMsgqUr9HIbJrLUMGtyviKO6MYYdzQwntGoY6jVqqby0tj+8RfTHMjlRmD tWdpU8U26XkCzXZouHYXglhft1FQqW8ReGymRvXnrqBekSc381P8EBovy6I4GQDQ 7q1dsstvSh3S5/CKIt5hy3V9NI6oSOOZ6rD16sCPAU3SH5COm6yGGSpi/TaEPTcK 8BuZJI3o9OvAvNBA0hrrrKDav4jmKTVRcCuDJptnT+wxKeH6g9OWxJ8QiHjjsJpA E23weCyw04s= =jTW4 -----END PGP SIGNATURE----- --==_Exmh_1570225877_7127P-- --===============8837658366492939303== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies --===============8837658366492939303==--