Received: by 2002:a25:e74b:0:0:0:0:0 with SMTP id e72csp2250741ybh; Fri, 24 Jul 2020 08:08:03 -0700 (PDT) X-Google-Smtp-Source: ABdhPJwmOzvLKBbxkj8knyGN1GHu35Lt2Qnd5HyLZzlK4N8GWPKdvAY7jI8elU5enrUZ1U4ENFKT X-Received: by 2002:a17:906:e25a:: with SMTP id gq26mr9265240ejb.152.1595603283363; Fri, 24 Jul 2020 08:08:03 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1595603283; cv=none; d=google.com; s=arc-20160816; b=EOI1iJG+qnIeuDDTFakUnqV8CAIZqLfLcTrLBRwYPmP7aTvd+776poOVPWDDvI/yih S21xdS5S+3EyXGwVx693960qaB60FdGWMlw+Fr/dez2mb3I6Nf/aAynY2hNCdgyiFsgz vpedJ3lfa5Ae3gRFOzeN2WWNLsKy6eKdsmh0nIuuHbMoRTlIN5DJ4Dzsg8QWofI2Mi3t 4fs9Bls+H+T6V9kqVts6QsN2wijZHFk30lQa5KJJ9cm8yzKH6GQToQHNWZoBEbYMGqWQ QiCL9ADJC9gth+ohdGJokDNHq32qqi/HeXMyqZLF+s5Rqb0Kc+ii83Ow4jgOiv0p4/tx pieQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:autocrypt:from:references:cc:to:subject:ironport-sdr :ironport-sdr; bh=v3pz870Bv+aOuxc4u8SIUlZ0zay//kfQ59DBv2C/Jq0=; b=xMD5Lneq0tUCtqB5ciNrLOOinHXj9wSMmHLr+tmbtrDZMM4/y2AGLUVX2b0K9LKWJB TiZzB8BBq+YF0/BH3rT/tZmdkekCnWFXGdDZbx6oyU0rgHDTOCtVFq/kCn2+NURCIjM6 yT/Ol6IGHa3rpvlLzy0tnXTvfckBS0sQT1+BItdhlWgjIPIgto9GYwf/1Y9wdPMLsl6k EJusn3Kb59R0jWAaz7QEbSk8mHtpn0wqUVMp8zZ0CRUlbn+R2FvzJM6AD/VyMPhTkm5n IMCsSwS7oHmQoLKVfvVTvKhnTeICpiaLmHHlsZ1jETnsjuyBc+KYtWsPXK5cNNjyM/98 0psw== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id u23si617453eds.479.2020.07.24.08.07.36; Fri, 24 Jul 2020 08:08:03 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=intel.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726719AbgGXPEp (ORCPT + 99 others); Fri, 24 Jul 2020 11:04:45 -0400 Received: from mga03.intel.com ([134.134.136.65]:29770 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726424AbgGXPEp (ORCPT ); Fri, 24 Jul 2020 11:04:45 -0400 IronPort-SDR: bFAZoFZHU5UnLqG2+jLbTSneFZG0KVi/0fVxSdhkwfrIEHpi462Zytbw8npWNPXihnnu7vNJLi C5/R6a7WIuSg== X-IronPort-AV: E=McAfee;i="6000,8403,9692"; a="150707881" X-IronPort-AV: E=Sophos;i="5.75,391,1589266800"; d="scan'208";a="150707881" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jul 2020 08:04:43 -0700 IronPort-SDR: NgWnn2vYN5rkrw0weE/RDK4BXSge/PUXmX/ZIAOKto8ScMQ5WovYfye3mH2ovmW6LRbYFbaY9e dHpUD4/kd32w== X-IronPort-AV: E=Sophos;i="5.75,391,1589266800"; d="scan'208";a="289015334" Received: from wladeau-mobl.amr.corp.intel.com (HELO [10.254.78.254]) ([10.254.78.254]) by orsmga006-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Jul 2020 08:04:42 -0700 Subject: Re: [PATCH 0/3] Drop unused MAX_PHYSADDR_BITS To: Arvind Sankar , x86@kernel.org, Dave Hansen , Andy Lutomirski , Peter Zijlstra , linux-sh@vger.kernel.org, Yoshinori Sato , Rich Felker , sparclinux@vger.kernel.org, "David S. Miller" Cc: Andrew Morton , linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20200723231544.17274-1-nivedita@alum.mit.edu> From: Dave Hansen Autocrypt: addr=dave.hansen@intel.com; keydata= xsFNBE6HMP0BEADIMA3XYkQfF3dwHlj58Yjsc4E5y5G67cfbt8dvaUq2fx1lR0K9h1bOI6fC oAiUXvGAOxPDsB/P6UEOISPpLl5IuYsSwAeZGkdQ5g6m1xq7AlDJQZddhr/1DC/nMVa/2BoY 2UnKuZuSBu7lgOE193+7Uks3416N2hTkyKUSNkduyoZ9F5twiBhxPJwPtn/wnch6n5RsoXsb ygOEDxLEsSk/7eyFycjE+btUtAWZtx+HseyaGfqkZK0Z9bT1lsaHecmB203xShwCPT49Blxz VOab8668QpaEOdLGhtvrVYVK7x4skyT3nGWcgDCl5/Vp3TWA4K+IofwvXzX2ON/Mj7aQwf5W iC+3nWC7q0uxKwwsddJ0Nu+dpA/UORQWa1NiAftEoSpk5+nUUi0WE+5DRm0H+TXKBWMGNCFn c6+EKg5zQaa8KqymHcOrSXNPmzJuXvDQ8uj2J8XuzCZfK4uy1+YdIr0yyEMI7mdh4KX50LO1 pmowEqDh7dLShTOif/7UtQYrzYq9cPnjU2ZW4qd5Qz2joSGTG9eCXLz5PRe5SqHxv6ljk8mb ApNuY7bOXO/A7T2j5RwXIlcmssqIjBcxsRRoIbpCwWWGjkYjzYCjgsNFL6rt4OL11OUF37wL QcTl7fbCGv53KfKPdYD5hcbguLKi/aCccJK18ZwNjFhqr4MliQARAQABzShEYXZpZCBDaHJp c3RvcGhlciBIYW5zZW4gPGRhdmVAc3I3MS5uZXQ+wsF7BBMBAgAlAhsDBgsJCAcDAgYVCAIJ CgsEFgIDAQIeAQIXgAUCTo3k0QIZAQAKCRBoNZUwcMmSsMO2D/421Xg8pimb9mPzM5N7khT0 2MCnaGssU1T59YPE25kYdx2HntwdO0JA27Wn9xx5zYijOe6B21ufrvsyv42auCO85+oFJWfE K2R/IpLle09GDx5tcEmMAHX6KSxpHmGuJmUPibHVbfep2aCh9lKaDqQR07gXXWK5/yU1Dx0r VVFRaHTasp9fZ9AmY4K9/BSA3VkQ8v3OrxNty3OdsrmTTzO91YszpdbjjEFZK53zXy6tUD2d e1i0kBBS6NLAAsqEtneplz88T/v7MpLmpY30N9gQU3QyRC50jJ7LU9RazMjUQY1WohVsR56d ORqFxS8ChhyJs7BI34vQusYHDTp6PnZHUppb9WIzjeWlC7Jc8lSBDlEWodmqQQgp5+6AfhTD kDv1a+W5+ncq+Uo63WHRiCPuyt4di4/0zo28RVcjtzlGBZtmz2EIC3vUfmoZbO/Gn6EKbYAn rzz3iU/JWV8DwQ+sZSGu0HmvYMt6t5SmqWQo/hyHtA7uF5Wxtu1lCgolSQw4t49ZuOyOnQi5 f8R3nE7lpVCSF1TT+h8kMvFPv3VG7KunyjHr3sEptYxQs4VRxqeirSuyBv1TyxT+LdTm6j4a mulOWf+YtFRAgIYyyN5YOepDEBv4LUM8Tz98lZiNMlFyRMNrsLV6Pv6SxhrMxbT6TNVS5D+6 UorTLotDZKp5+M7BTQRUY85qARAAsgMW71BIXRgxjYNCYQ3Xs8k3TfAvQRbHccky50h99TUY sqdULbsb3KhmY29raw1bgmyM0a4DGS1YKN7qazCDsdQlxIJp9t2YYdBKXVRzPCCsfWe1dK/q 66UVhRPP8EGZ4CmFYuPTxqGY+dGRInxCeap/xzbKdvmPm01Iw3YFjAE4PQ4hTMr/H76KoDbD cq62U50oKC83ca/PRRh2QqEqACvIH4BR7jueAZSPEDnzwxvVgzyeuhwqHY05QRK/wsKuhq7s UuYtmN92Fasbxbw2tbVLZfoidklikvZAmotg0dwcFTjSRGEg0Gr3p/xBzJWNavFZZ95Rj7Et db0lCt0HDSY5q4GMR+SrFbH+jzUY/ZqfGdZCBqo0cdPPp58krVgtIGR+ja2Mkva6ah94/oQN lnCOw3udS+Eb/aRcM6detZr7XOngvxsWolBrhwTQFT9D2NH6ryAuvKd6yyAFt3/e7r+HHtkU kOy27D7IpjngqP+b4EumELI/NxPgIqT69PQmo9IZaI/oRaKorYnDaZrMXViqDrFdD37XELwQ gmLoSm2VfbOYY7fap/AhPOgOYOSqg3/Nxcapv71yoBzRRxOc4FxmZ65mn+q3rEM27yRztBW9 AnCKIc66T2i92HqXCw6AgoBJRjBkI3QnEkPgohQkZdAb8o9WGVKpfmZKbYBo4pEAEQEAAcLB XwQYAQIACQUCVGPOagIbDAAKCRBoNZUwcMmSsJeCEACCh7P/aaOLKWQxcnw47p4phIVR6pVL e4IEdR7Jf7ZL00s3vKSNT+nRqdl1ugJx9Ymsp8kXKMk9GSfmZpuMQB9c6io1qZc6nW/3TtvK pNGz7KPPtaDzvKA4S5tfrWPnDr7n15AU5vsIZvgMjU42gkbemkjJwP0B1RkifIK60yQqAAlT YZ14P0dIPdIPIlfEPiAWcg5BtLQU4Wg3cNQdpWrCJ1E3m/RIlXy/2Y3YOVVohfSy+4kvvYU3 lXUdPb04UPw4VWwjcVZPg7cgR7Izion61bGHqVqURgSALt2yvHl7cr68NYoFkzbNsGsye9ft M9ozM23JSgMkRylPSXTeh5JIK9pz2+etco3AfLCKtaRVysjvpysukmWMTrx8QnI5Nn5MOlJj 1Ov4/50JY9pXzgIDVSrgy6LYSMc4vKZ3QfCY7ipLRORyalFDF3j5AGCMRENJjHPD6O7bl3Xo 4DzMID+8eucbXxKiNEbs21IqBZbbKdY1GkcEGTE7AnkA3Y6YB7I/j9mQ3hCgm5muJuhM/2Fr OPsw5tV/LmQ5GXH0JQ/TZXWygyRFyyI2FqNTx4WHqUn3yFj8rwTAU1tluRUYyeLy0ayUlKBH ybj0N71vWO936MqP6haFERzuPAIpxj2ezwu0xb1GjTk4ynna6h5GjnKgdfOWoRtoWndMZxbA z5cecg== Message-ID: Date: Fri, 24 Jul 2020 08:04:41 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200723231544.17274-1-nivedita@alum.mit.edu> 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 7/23/20 4:15 PM, Arvind Sankar wrote: > This #define is not used anywhere, and has the wrong value on x86_64. Yeah, it certainly is unused. > I tried digging into the history a bit, but it seems to have been unused > even in the initial merge of sparsemem in v2.6.13, when it was first > defined. Yep, I don't even remember why we thought we needed it back then. Feel free to add my ack on these, or at least the x86 one.