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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 701CFC433EF for ; Fri, 24 Jun 2022 05:20:46 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 118456B02A2; Fri, 24 Jun 2022 01:20:46 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 0C7D56B02A4; Fri, 24 Jun 2022 01:20:46 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id EF9136B02A5; Fri, 24 Jun 2022 01:20:45 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0012.hostedemail.com [216.40.44.12]) by kanga.kvack.org (Postfix) with ESMTP id E1BB06B02A2 for ; Fri, 24 Jun 2022 01:20:45 -0400 (EDT) Received: from smtpin09.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id BBF7635480 for ; Fri, 24 Jun 2022 05:20:45 +0000 (UTC) X-FDA: 79611979650.09.69F93F9 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by imf23.hostedemail.com (Postfix) with ESMTP id EF81D140028 for ; Fri, 24 Jun 2022 05:20:44 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 1BB59176A; Thu, 23 Jun 2022 22:20:44 -0700 (PDT) Received: from [10.162.41.7] (unknown [10.162.41.7]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id CB2DF3F66F; Thu, 23 Jun 2022 22:20:36 -0700 (PDT) Message-ID: <33bdac1e-207a-192b-bf43-818abfa49fe1@arm.com> Date: Fri, 24 Jun 2022 10:50:33 +0530 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: [PATCH V4 00/26] mm/mmap: Drop __SXXX/__PXXX macros from across platforms Content-Language: en-US To: Christoph Hellwig Cc: linux-mm@kvack.org, christophe.leroy@csgroup.eu, Andrew Morton , linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, x86@kernel.org, openrisc@lists.librecores.org, linux-xtensa@linux-xtensa.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-parisc@vger.kernel.org, linux-alpha@vger.kernel.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-ia64@vger.kernel.org, linux-mips@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-um@lists.infradead.org, linux-sh@vger.kernel.org, linux-kernel@vger.kernel.org References: <20220624044339.1533882-1-anshuman.khandual@arm.com> From: Anshuman Khandual In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1656048045; a=rsa-sha256; cv=none; b=uL1BBI8Y1GNqdKwgPQi5VDK6JM8+YTJuJ61K/10AOFZJD9BlDAnJicrFU0lzAPBaH4c7R0 61BdzPzbz+tSRavHVdwg3AL+Lhue+tG90PmyvlMeeRdkkrqxxYVh+pZBYEr86q46UqiQ4L cJLlkDedZVDWGIRTXdWYR3c+6nDN/bY= ARC-Authentication-Results: i=1; imf23.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf23.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1656048045; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ItW/ReTRAjU8HlFxrM0oB57SAs4jmC4F39d/zTQvVsw=; b=t2uXLID3MvLsc5sfeL9D4AXZPf+jh5xHx2vThKqCyfV4XS1qhj6SkzUcFePjzRyM8pxr/T GiIqzKqX5LMD+Th6lqn5zfUJTFmVZDygdfknFeIlX7vci9IjQ9rnAjLTMk1953sYMjc+Ld akNFE17t8fTkHEXczMVrJ6pcMMt8Qxk= X-Rspam-User: X-Stat-Signature: x8xhtkaofozxp5umxwzhn6k94jeyasoe X-Rspamd-Queue-Id: EF81D140028 Authentication-Results: imf23.hostedemail.com; dkim=none; dmarc=pass (policy=none) header.from=arm.com; spf=pass (imf23.hostedemail.com: domain of anshuman.khandual@arm.com designates 217.140.110.172 as permitted sender) smtp.mailfrom=anshuman.khandual@arm.com X-Rspamd-Server: rspam03 X-HE-Tag: 1656048044-463252 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On 6/24/22 10:42, Christoph Hellwig wrote: > On Fri, Jun 24, 2022 at 10:13:13AM +0530, Anshuman Khandual wrote: >> vm_get_page_prot(), in order for it to be reused on platforms that do not >> require custom implementation. Finally, ARCH_HAS_VM_GET_PAGE_PROT can just >> be dropped, as all platforms now define and export vm_get_page_prot(), via >> looking up a private and static protection_map[] array. protection_map[] >> data type is the following for all platforms without deviation (except the >> powerpc one which is shared between 32 and 64 bit platforms), keeping it >> unchanged for now. >> >> static pgprot_t protection_map[16] __ro_after_init > > On most architectures this should be const now, only very few ever > modify it. Will make it a 'static const pgprot_t protection_map[16] __ro_after_init' on platforms that do not change the protection_map[] even during boot.