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2048-bit rsa key) header.d=1e100.net header.i=@1e100.net header.b=WgYnPh/T; 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=gmail.com header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751877AbeCPEug (ORCPT ); Fri, 16 Mar 2018 00:50:36 -0400 Received: from mail-pf0-f193.google.com ([209.85.192.193]:37477 "EHLO mail-pf0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750748AbeCPEu3 (ORCPT ); Fri, 16 Mar 2018 00:50:29 -0400 X-Google-Smtp-Source: AG47ELszBUow7lgV6sAHIE9oAlYxOIDc0e6j/J7/lnECCjCcTf7gn494naIk/nRl9KUDIO06gq2Y3Q== Date: Fri, 16 Mar 2018 10:20:16 +0530 From: afzal mohammed To: Arnd Bergmann Cc: David Howells , 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 Subject: Re: [PATCH 00/16] remove eight obsolete architectures Message-ID: <20180316045016.GA7697@afzalpc> References: <20180314143529.1456168-1-arnd@arndb.de> <2929.1521106970@warthog.procyon.org.uk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.24 (2015-08-30) 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: Hi, On Thu, Mar 15, 2018 at 10:56:48AM +0100, Arnd Bergmann wrote: > On Thu, Mar 15, 2018 at 10:42 AM, David Howells wrote: > > Do we have anything left that still implements NOMMU? Please don't kill !MMU. > Yes, plenty. > 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 ARMv7-R as well, also seems ARM is coming up with more !MMU's - v8-M, v8-R. In addition, though only of academic interest, ARM MMU capable platform's can run !MMU Linux. afzal > - 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