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=-0.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 6D856ECDE44 for ; Fri, 26 Oct 2018 19:05:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0A0F22085B for ; Fri, 26 Oct 2018 19:05:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="qf+6EyNn" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 0A0F22085B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727774AbeJ0Dnw (ORCPT ); Fri, 26 Oct 2018 23:43:52 -0400 Received: from mail-yb1-f194.google.com ([209.85.219.194]:35313 "EHLO mail-yb1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726501AbeJ0Dnv (ORCPT ); Fri, 26 Oct 2018 23:43:51 -0400 Received: by mail-yb1-f194.google.com with SMTP id k132-v6so910989ybc.2; Fri, 26 Oct 2018 12:05:37 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:cc:references:from:openpgp:autocrypt:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=FAfIpbbf5i32tB0r0OpipHm6jpAr1/uuQfuj8ItsGRA=; b=qf+6EyNnERQ9ISNKEs/mkjInmLhEi3e5XFQKCPEk9Rvbx9WMTSytjprKr1IKEWMkyE A0TiP8GXcfT4mMjuooA8trWdBcYRNEQ/SQtCXRR7NON8uqPDwo8QOptKmAfFgOCxe1CI dgBYCHD675VdwrtYHgijFyUl7N2oE8TFTqSxb5b3bWIGVo1begYx0OeNs40ZDNGviBm9 5Fsex7kf8CYy/FXCKbGDTA/QRFfTEZBSYEc2XefNvN7iq03zwPD0x80b0r/6iYQiMk5r Aj3UYw43WcYJuAbXOui+EXjE1UDiUD5pN1Z1eXW5ZNPzki6NlRY3P6F/sfP5uidsdlY1 SbFA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:cc:references:from:openpgp:autocrypt :message-id:date:user-agent:mime-version:in-reply-to :content-language:content-transfer-encoding; bh=FAfIpbbf5i32tB0r0OpipHm6jpAr1/uuQfuj8ItsGRA=; b=qFV3cgu33U77ftefObAxSGYc3oHm+IbAQt8XQeJ+oAWG9Q5KVHRU2H5XOhY6+PLdOD uoQKLAyONo0iJrHSr84DEg//i0KoKM6dm/uf7RoOWtk0fQmG0CpYRQrvFjgTbn/KIFu+ aTBQJav3ENVJWnty8R6J2WgDkZua1TnfRLSmPJUdZX4cAvsV1Vxwz0w2qhAEzUUYpgdc jS47bClyXAREwm7yhMcckIZg8R+brJatmtS92NCq9bvhaRNENgqEAoY4Vp63i/O/alWB uSEWnJCA10DuWRa8G6Iyz4EUmsQQjaf5xM9qHCy9G/fexBxZT4A774rQilFR2nYW5OlB shDA== X-Gm-Message-State: AGRZ1gIWPQJZ5DR383DRv8oY1kkj5Nmf8opUFr08XWbZxo985yY96XUl ZSAPrm6d1V64PGbdFMX7mHOEIGtK X-Google-Smtp-Source: AJdET5dV1IOus9aqQsph3pmNqMsV4bLMRQ4D26c0WAXpjJOwhptLhWUaKk6TE97vVn+BFlm+D9FO6A== X-Received: by 2002:a25:73c2:: with SMTP id o185-v6mr4910563ybc.254.1540580736335; Fri, 26 Oct 2018 12:05:36 -0700 (PDT) Received: from [10.67.49.121] ([192.19.223.250]) by smtp.googlemail.com with ESMTPSA id r5-v6sm6493141ywr.80.2018.10.26.12.05.32 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 26 Oct 2018 12:05:35 -0700 (PDT) Subject: Re: [PATCH v2 0/2] arm64: Cut rebuild time when changing CONFIG_BLK_DEV_INITRD To: Mike Rapoport Cc: Rob Herring , Ard Biesheuvel , "linux-kernel@vger.kernel.org" , Catalin Marinas , Will Deacon , Arnd Bergmann , Greg Kroah-Hartman , Marc Zyngier , Olof Johansson , linux-alpha@vger.kernel.org, arcml , "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" , linux-c6x-dev@linux-c6x.org, "moderated list:H8/300 ARCHITECTURE" , linux-hexagon@vger.kernel.org, linux-ia64@vger.kernel.org, linux-m68k@lists.linux-m68k.org, Linux-MIPS , nios2-dev@lists.rocketboards.org, Openrisc , linux-parisc@vger.kernel.org, linuxppc-dev , linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, SH-Linux , sparclinux@vger.kernel.org, linux-um@lists.infradead.org, linux-xtensa@linux-xtensa.org, devicetree@vger.kernel.org, "open list:GENERIC INCLUDE/ASM HEADER FILES" References: <20181024193256.23734-1-f.fainelli@gmail.com> <20181025093833.GA23607@rapoport-lnx> <20181025172935.GA27364@rapoport-lnx> <1bb3bd63-a88e-b668-ea36-f0f985c0e2b1@gmail.com> <20181026110708.GA3814@rapoport-lnx> From: Florian Fainelli Openpgp: preference=signencrypt Autocrypt: addr=f.fainelli@gmail.com; prefer-encrypt=mutual; keydata= xsDiBEjPuBIRBACW9MxSJU9fvEOCTnRNqG/13rAGsj+vJqontvoDSNxRgmafP8d3nesnqPyR xGlkaOSDuu09rxuW+69Y2f1TzjFuGpBk4ysWOR85O2Nx8AJ6fYGCoeTbovrNlGT1M9obSFGQ X3IzRnWoqlfudjTO5TKoqkbOgpYqIo5n1QbEjCCwCwCg3DOH/4ug2AUUlcIT9/l3pGvoRJ0E AICDzi3l7pmC5IWn2n1mvP5247urtHFs/uusE827DDj3K8Upn2vYiOFMBhGsxAk6YKV6IP0d ZdWX6fqkJJlu9cSDvWtO1hXeHIfQIE/xcqvlRH783KrihLcsmnBqOiS6rJDO2x1eAgC8meAX SAgsrBhcgGl2Rl5gh/jkeA5ykwbxA/9u1eEuL70Qzt5APJmqVXR+kWvrqdBVPoUNy/tQ8mYc nzJJ63ng3tHhnwHXZOu8hL4nqwlYHRa9eeglXYhBqja4ZvIvCEqSmEukfivk+DlIgVoOAJbh qIWgvr3SIEuR6ayY3f5j0f2ejUMYlYYnKdiHXFlF9uXm1ELrb0YX4GMHz80nRmxvcmlhbiBG YWluZWxsaSA8Zi5mYWluZWxsaUBnbWFpbC5jb20+wmYEExECACYCGyMGCwkIBwMCBBUCCAME FgIDAQIeAQIXgAUCVF/S8QUJHlwd3wAKCRBhV5kVtWN2DvCVAJ4u4/bPF4P3jxb4qEY8I2gS 6hG0gACffNWlqJ2T4wSSn+3o7CCZNd7SLSDOw00ESM+4EhAQAL/o09boR9D3Vk1Tt7+gpYr3 WQ6hgYVON905q2ndEoA2J0dQxJNRw3snabHDDzQBAcqOvdi7YidfBVdKi0wxHhSuRBfuOppu pdXkb7zxuPQuSveCLqqZWRQ+Cc2QgF7SBqgznbe6Ngout5qXY5Dcagk9LqFNGhJQzUGHAsIs hap1f0B1PoUyUNeEInV98D8Xd/edM3mhO9nRpUXRK9Bvt4iEZUXGuVtZLT52nK6Wv2EZ1TiT OiqZlf1P+vxYLBx9eKmabPdm3yjalhY8yr1S1vL0gSA/C6W1o/TowdieF1rWN/MYHlkpyj9c Rpc281gAO0AP3V1G00YzBEdYyi0gaJbCEQnq8Vz1vDXFxHzyhgGz7umBsVKmYwZgA8DrrB0M oaP35wuGR3RJcaG30AnJpEDkBYHznI2apxdcuTPOHZyEilIRrBGzDwGtAhldzlBoBwE3Z3MY 31TOpACu1ZpNOMysZ6xiE35pWkwc0KYm4hJA5GFfmWSN6DniimW3pmdDIiw4Ifcx8b3mFrRO BbDIW13E51j9RjbO/nAaK9ndZ5LRO1B/8Fwat7bLzmsCiEXOJY7NNpIEpkoNoEUfCcZwmLrU +eOTPzaF6drw6ayewEi5yzPg3TAT6FV3oBsNg3xlwU0gPK3v6gYPX5w9+ovPZ1/qqNfOrbsE FRuiSVsZQ5s3AAMFD/9XjlnnVDh9GX/r/6hjmr4U9tEsM+VQXaVXqZuHKaSmojOLUCP/YVQo 7IiYaNssCS4FCPe4yrL4FJJfJAsbeyDykMN7wAnBcOkbZ9BPJPNCbqU6dowLOiy8AuTYQ48m vIyQ4Ijnb6GTrtxIUDQeOBNuQC/gyyx3nbL/lVlHbxr4tb6YkhkO6shjXhQh7nQb33FjGO4P WU11Nr9i/qoV8QCo12MQEo244RRA6VMud06y/E449rWZFSTwGqb0FS0seTcYNvxt8PB2izX+ HZA8SL54j479ubxhfuoTu5nXdtFYFj5Lj5x34LKPx7MpgAmj0H7SDhpFWF2FzcC1bjiW9mjW HaKaX23Awt97AqQZXegbfkJwX2Y53ufq8Np3e1542lh3/mpiGSilCsaTahEGrHK+lIusl6mz Joil+u3k01ofvJMK0ZdzGUZ/aPMZ16LofjFA+MNxWrZFrkYmiGdv+LG45zSlZyIvzSiG2lKy kuVag+IijCIom78P9jRtB1q1Q5lwZp2TLAJlz92DmFwBg1hyFzwDADjZ2nrDxKUiybXIgZp9 aU2d++ptEGCVJOfEW4qpWCCLPbOT7XBr+g/4H3qWbs3j/cDDq7LuVYIe+wchy/iXEJaQVeTC y5arMQorqTFWlEOgRA8OP47L9knl9i4xuR0euV6DChDrguup2aJVU8JPBBgRAgAPAhsMBQJU X9LxBQkeXB3fAAoJEGFXmRW1Y3YOj4UAn3nrFLPZekMeqX5aD/aq/dsbXSfyAKC45Go0YyxV HGuUuzv+GKZ6nsysJw== Message-ID: <53ec9df5-ef2a-edc5-be1c-bca32959c0bc@gmail.com> Date: Fri, 26 Oct 2018 12:05:25 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <20181026110708.GA3814@rapoport-lnx> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/26/18 4:07 AM, Mike Rapoport wrote: > On Thu, Oct 25, 2018 at 04:07:13PM -0700, Florian Fainelli wrote: >> On 10/25/18 2:13 PM, Rob Herring wrote: >>> On Thu, Oct 25, 2018 at 12:30 PM Mike Rapoport wrote: >>>> >>>> On Thu, Oct 25, 2018 at 08:15:15AM -0500, Rob Herring wrote: >>>>> +Ard >>>>> >>>>> On Thu, Oct 25, 2018 at 4:38 AM Mike Rapoport wrote: >>>>>> >>>>>> On Wed, Oct 24, 2018 at 02:55:17PM -0500, Rob Herring wrote: >>>>>>> On Wed, Oct 24, 2018 at 2:33 PM Florian Fainelli wrote: >>>>>>>> >>>>>>>> Hi all, >>>>>>>> >>>>>>>> While investigating why ARM64 required a ton of objects to be rebuilt >>>>>>>> when toggling CONFIG_DEV_BLK_INITRD, it became clear that this was >>>>>>>> because we define __early_init_dt_declare_initrd() differently and we do >>>>>>>> that in arch/arm64/include/asm/memory.h which gets included by a fair >>>>>>>> amount of other header files, and translation units as well. >>>>>>> >>>>>> I think arm64 does not have to redefine __early_init_dt_declare_initrd(). >>>>>> Something like this might be just all we need (completely untested, >>>>>> probably it won't even compile): > > [ ... ] > >> FWIW, I am extracting the ARM implementation that parses the initrd >> early command line parameter and the "setup" code doing the page >> boundary alignment and memblock checking into a helper into lib/ that >> other architectures can re-use. So far, this removes the need for >> unicore32, arc and arm to duplicate essentially the same logic. > > Presuming you are going to need asm-generic/initrd.h for that as well, > using override for __early_init_dt_declare_initrd in arm64 version of > initrd.h might be the simplest option. What I am contemplating doing is promote phys_initrd_start/phys_initrd_size to be global variables (similar to initrd_start, initrd_end) and have a generic helper function for parsing the initrd= command line parameter and finally removing __early_init_dt_declare_initrd() because we could have early_init_dt_check_for_initrd() just populate phys_initrd_start/phys_initrd_size directly as well as initrd_start/initrd_end using __va() to preserve compatibility with architectures that rely on this. Then I would convert ARM64 to check for phys_initrd_start which is really what it is is trying to do in arch/arm64/mm/init.c::arm64_memblock_init(). Does that sound like a reasonable approach? -- Florian