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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED 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 0E760C48BDF for ; Fri, 18 Jun 2021 13:39:05 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 89434613EE for ; Fri, 18 Jun 2021 13:39:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 89434613EE Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arndb.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 07B886B0071; Fri, 18 Jun 2021 09:39:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 004C16B0072; 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Fri, 18 Jun 2021 06:39:00 -0700 (PDT) X-Gm-Message-State: AOAM530bmv9AwR2tRwYoTbfi2Vf4Dj6ZQbM9JjjMNhXPocg8ouHZhq2j XlNqj4PYUUo9N0j3D1LVUWv9Y7mUfV4l119H/Lo= X-Google-Smtp-Source: ABdhPJxVD5+tW/Jgy58X+CwgUp4mUTAmg464TUvUB8YCvLiMqzZHmfKDoNJ2ZUN/OE5n7UNa4bVSUdvXG8KC+jFlc64= X-Received: by 2002:a05:6000:1561:: with SMTP id 1mr12561494wrz.165.1624023540546; Fri, 18 Jun 2021 06:39:00 -0700 (PDT) MIME-Version: 1.0 References: <2142129092ff9aa00e600c42a26c4015b7f5ceec.1623813516.git.luto@kernel.org> <20210616103446.GC22278@shell.armlinux.org.uk> <20210616132226.GD22278@shell.armlinux.org.uk> <20210616150456.GC22433@arm.com> <20210616152326.GG22278@shell.armlinux.org.uk> <20210616154529.GD22433@arm.com> <20210616160050.GE22433@arm.com> <20210616162716.GH22278@shell.armlinux.org.uk> In-Reply-To: From: Arnd Bergmann Date: Fri, 18 Jun 2021 15:36:49 +0200 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH 7/8] membarrier: Remove arm (32) support for SYNC_CORE To: Linus Walleij Cc: "Russell King (Oracle)" , Catalin Marinas , Krzysztof Halasa , Neil Armstrong , Peter Zijlstra , Andy Lutomirski , "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" , Dave Hansen , LKML , Linux Memory Management List , Andrew Morton , Mathieu Desnoyers , Nicholas Piggin , Linux ARM , Will Deacon , Daniel Golle Content-Type: text/plain; charset="UTF-8" X-Provags-ID: V03:K1:WR2g+57QYQ3PfL/nOzBysImLwuCw+/+QzEEA/DzMq6EdpSb0xtW egob8hW1gJ6NfgsDdI5VmD3ISiPNuYp9ZWyWVIi7xogg2fVkXQT1LWbmNEIG3MfUUTBgrgg do+hv0pJAeh0QccrCWXdxesMbp26cOkZss+sUA1s4zzACnvRDrf1qLzdrbj5DozeUgrBops lVuiHmTkROejZHW5hWe3A== X-UI-Out-Filterresults: notjunk:1;V03:K0:UyeQ11vQJQU=:ANani5k0g/aYc+bH6d7LTy 8kwU9ib/gQxCT9ZHWOhrTslvAJCBCwmfUfNszMgyxrOVRl0HtGYe1Lu3FzWd6C/JRJHF1CIXW yZ+CHobqrwZFF+02yqfCFI2g4h6ROkuHMGNgJHVNEAhPKQ5LQD76G6CrBqK2juNEnCGmeVtzk CQZhRuFaApHvAWsRq0aF8hiQLXYQGlTzt9HSx8R7odUxGyZ+Hn5oB9quUkNWuwsG58gCnoSLF 7joLOw7Rf+JFMufQzxVRv12i5keFlSMhmyuWPBPArzLr0L66gDf64AWpaM5JNz8Vb4varxPPQ nkek5Nwjremkn2zdk/KcRu/Vxf3yw7kQVDJCa0Uh8k3uiaqrqHDfPG7HPgj8b0MbDfVIztXL6 mYdOluEC2q3mCwY89FG1+OM//BAsEXSXUpuT+bxwlSlnZVpjV3u/mQJP8Qk0Aq1T8EhYQI3+C 69oFwVE/lkNrSyrWfGgo5APD+8FyLK2EaANT3wOGcLmCd0w0/4T+wilGkf9Ck5QGDyPob0tR3 p2KuTsYfz59LVwXsAlmCO/XP5ixCIe+84xYSdttgtbySwIjA9SH6u8TKQCDKTWo/9ZoFe40ar XOJSDrKa/0K9r0CTMxfNVxZ5UQBQENipzp2WVfm2KoTPRfrt86C+P0uGALlmZI2Lz0G3MqEq9 Hr7A= Authentication-Results: imf17.hostedemail.com; dkim=none; spf=none (imf17.hostedemail.com: domain of arnd@arndb.de has no SPF policy when checking 212.227.17.13) smtp.mailfrom=arnd@arndb.de; dmarc=none X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: B26554202A2E X-Stat-Signature: tutmyqxuhkntfdp7aojmehd5qdmsmjj7 X-HE-Tag: 1624023541-119864 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Jun 18, 2021 at 2:54 PM Linus Walleij wrote: > On Wed, Jun 16, 2021 at 6:27 PM Russell King (Oracle) wrote: > > So it seems to come down to a question about CNS3xxx and OXNAS. If > > these aren't being used, maybe we can drop ARM11MPCore support and > > the associated platforms? > > > > Linus, Krzysztof, Neil, any input? > > I don't especially need to keep the ARM11MPCore machine alive, > it is just a testchip after all. The Oxnas is another story, that has wide > deployment and was contributed recently (2016) and has excellent > support in OpenWrt so I wouldn't really want to axe that. Agreed, as long as oxnas and/or cns3xxx are around, we should just keep the realview 11mpcore support, but if both of the commercial platforms are gone, then the realview can be retired as far as I'm concerned. Regarding oxnas, I see that OpenWRT has a number of essential device drivers (sata, pcie, usb and reset) that look like they could just be merged upstream, but that effort appears to have stalled: no device support was added to the dts files since the original 2016 merge. While the support in OpenWRT may be excellent, the platform support in the mainline kernel is limited to ethernet, nand, uart and gpio. Arnd