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[209.132.180.67]) by mx.google.com with ESMTP id k6-v6si3674947pla.333.2018.03.15.02.58.11; Thu, 15 Mar 2018 02:58:24 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=fail header.i=@gmail.com header.s=20161025 header.b=J/biB/E+; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752077AbeCOJ5A (ORCPT + 99 others); Thu, 15 Mar 2018 05:57:00 -0400 Received: from mail-qk0-f195.google.com ([209.85.220.195]:39262 "EHLO mail-qk0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751673AbeCOJ4v (ORCPT ); Thu, 15 Mar 2018 05:56:51 -0400 Received: by mail-qk0-f195.google.com with SMTP id z197so6609657qkb.6; Thu, 15 Mar 2018 02:56:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:sender:in-reply-to:references:from:date:message-id :subject:to:cc; bh=OMqd1VgrHvgbQQMrTrD8pBm+upCnCCpm4h7GlocNoeQ=; b=J/biB/E+Ufe9mvaK7LAzfwUV328z0+tjhYsqhI42As5sa2bI3k/eUVB27v1nPpS2jS eLTZscq32hZ07CgC7Wssod4eJc8Tz0UvPYYRF+leQVav6SU8+z7sSHeALkSWus5EFvkU j1baj6XgltksGVc/ObubLVLO/NeIUcQKWj9iEPCu2WQ+trDYId+mMcxvZ6l5EF9xhWBl 3WkeqYqzWy8GWWixR0esuK6C3jsQnEuEXurgOQyY2tvHkAdjUJi6jZASkCuGqzmiVuSN xumEFDPVzpDewZAcmr6yyElkcLoGZLZ0xTOAIijMVVdc9kOx5xtN2XQAQq4EqcXR6XFN L32g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:sender:in-reply-to:references:from :date:message-id:subject:to:cc; bh=OMqd1VgrHvgbQQMrTrD8pBm+upCnCCpm4h7GlocNoeQ=; b=GfeTDuja2j3Vrbu88ol72NXtKfCVxpxwsaJlFutgaglzC+a3d8BJSAg9pZ/+QaFCFq Jjpa0RMzNIHaGxP6qQqggFUGo5mi2GXorTalvlAy3SW5/rWAHwNhSGY9ExbkdbuvN1wd JKyTeTIreMqxBO+k14ajz/zt4fbMEworUWccAbRnckUkpgtdCfYpQ2wR+bbDdX4eNyYu 7oGcKetSLsJUYZdi4R9X2jX3cmAeVRAeM/86aCFZzwIUDwvudem7RxSeVx1oeMtSpxcD qMIdbfgr9/ApblS3NaccnBpi2uDtdPkHh1AZJSsLlFY7AD/4tLTzRfTWUYrN3wgIVS0C 6n1g== X-Gm-Message-State: AElRT7HKiIyq8qVoIcAdxwG05Q6R5zstKNU8sJMun9TQK2FT9Uy4QWf6 rWkzwscQLP+8GYkbBF30paplQS5pQQoGwHmGTbk= X-Received: by 10.55.158.137 with SMTP id h131mr6580425qke.330.1521107809219; Thu, 15 Mar 2018 02:56:49 -0700 (PDT) MIME-Version: 1.0 Received: by 10.12.185.46 with HTTP; Thu, 15 Mar 2018 02:56:48 -0700 (PDT) In-Reply-To: <2929.1521106970@warthog.procyon.org.uk> References: <20180314143529.1456168-1-arnd@arndb.de> <2929.1521106970@warthog.procyon.org.uk> From: Arnd Bergmann Date: Thu, 15 Mar 2018 10:56:48 +0100 X-Google-Sender-Auth: X_UtdCeig7hSjC-Q8-nfY85dSAI Message-ID: Subject: Re: [PATCH 00/16] remove eight obsolete architectures To: David Howells Cc: linux-arch , Linux Kernel Mailing List , "open list:DOCUMENTATION" , linux-block , IDE-ML , "open list:HID CORE LAYER" , Networking , linux-wireless , linux-pwm@vger.kernel.org, linux-rtc@vger.kernel.org, linux-spi , linux-usb@vger.kernel.org, dri-devel , linux-fbdev@vger.kernel.org, linux-watchdog@vger.kernel.org, Linux FS-devel Mailing List , Linux-MM Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Mar 15, 2018 at 10:42 AM, David Howells wrote: > Do we have anything left that still implements NOMMU? Yes, plenty. I was wondering the same thing, but it seems that the architectures we remove are almost completely representative of what we support overall, except that they are all not licensed to 3rd parties, unlike many of the ones we keep. I've made an overview of the remaining architectures for my own reference[1]. The remaining NOMMU architectures are: - arch/arm has ARMv7-M (Cortex-M microcontroller), which is actually gaining traction - arch/sh has an open-source J2 core that was added not that long ago, it seems to be the only SH compatible core that anyone is working on. - arch/microblaze supports both MMU/NOMMU modes (most use an MMU) - arch/m68k supports several NOMMU targets, both the coldfire SoCs and the classic processors - c6x has no MMU Arnd [1] https://docs.google.com/spreadsheets/d/1QxMvW5jpVG2jb4RM9CQQl27-wVpNYOa-_3K2RVKifb0