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2048-bit rsa key) header.d=1e100.net header.i=@1e100.net header.b=GfeTDuja; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=arndb.de header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752084AbeCOJ5A (ORCPT ); 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 X-Google-Smtp-Source: AG47ELswYjAhiXg34Sb9tuRXoGn63tbMLVg8B5NYNvABxn25n8f3RUHd9c+29rzSwT5/1ttPND6moobWZ1l1mWZbaVU= MIME-Version: 1.0 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-usb-owner@vger.kernel.org X-Mailing-List: linux-usb@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 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