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 AF41DC433EF for ; Mon, 6 Jun 2022 07:54:16 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 45D588D0010; Mon, 6 Jun 2022 03:54:16 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 409BF8D0009; Mon, 6 Jun 2022 03:54:16 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2D4178D0010; Mon, 6 Jun 2022 03:54:16 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 1B9F28D0009 for ; Mon, 6 Jun 2022 03:54:16 -0400 (EDT) Received: from smtpin18.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id EF8D634E7E for ; Mon, 6 Jun 2022 07:54:15 +0000 (UTC) X-FDA: 79547048070.18.19233A9 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf17.hostedemail.com (Postfix) with ESMTP id 04F154001B for ; Mon, 6 Jun 2022 07:53:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=lUQxgeaOx1V7BACAiT/2H3YxZOL12gsM6xoyyjRU6Dg=; b=GEjLN8te4doRjDnMvvD+Y/go0p UQTGBjb/7Ml2PTLMqaNlV9k9Z5tuMzxnudHCtbs9kPlMOVLUCrl148D9b4PmCVUSffpTNmeu/peek i3Y1Yh/DwCHiiiGfeUSRBxROzCXoe2zXodgJ/MqO4NwuXcSYGRRdvpDTbW+8a9zW8OyuUgMVBfVaB 2cks8R5KY7cjjmAYVVf+5vmGRzn4pdAn/rV5ph23L2jOhkZzZ/PfiucwUEYm00WRQ/Ht+UFAiF5Nl qdQBCjrkb4nVmUygpF9z4YRKsMUW89fbVMwhBLRjY9n5dj0ck+3boQ7w4+V6VHMLndkavXLINEoGf oFJHezHg==; Received: from hch by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1ny7Yv-0000fB-68; Mon, 06 Jun 2022 07:54:09 +0000 Date: Mon, 6 Jun 2022 00:54:09 -0700 From: Christoph Hellwig To: Kefeng Wang Cc: catalin.marinas@arm.com, will@kernel.org, akpm@linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, hch@infradead.org, arnd@arndb.de, anshuman.khandual@arm.com Subject: Re: [PATCH v4 5/6] arm64: mm: Convert to GENERIC_IOREMAP Message-ID: References: <20220606074815.139265-1-wangkefeng.wang@huawei.com> <20220606074815.139265-6-wangkefeng.wang@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20220606074815.139265-6-wangkefeng.wang@huawei.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Authentication-Results: imf17.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=GEjLN8te; dmarc=none; spf=none (imf17.hostedemail.com: domain of BATV+e288ad521791baeeb4bb+6861+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+e288ad521791baeeb4bb+6861+infradead.org+hch@bombadil.srs.infradead.org X-Stat-Signature: utesda6g1ryt446ym3e5kko9zrmmya4o X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 04F154001B X-HE-Tag: 1654502015-982780 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: > +#define ioremap_wc(addr, size) ioremap_prot((addr), (size), PROT_NORMAL_NC) > +#define ioremap_np(addr, size) ioremap_prot((addr), (size), PROT_DEVICE_nGnRnE) Please avoid the overly long lines here. Independt of that having a non-trivial body on a separate line tends to generlly be a lot more readable anyway. > +#define ioremap_cache(addr, size) ({ \ > + pfn_is_map_memory(__phys_to_pfn(addr)) ? \ > + (void __iomem *)__phys_to_virt(addr) : ioremap_prot(addr, size, PROT_NORMAL); \ > +}) And this really should be an inline function. > +int iounmap_allowed(void __iomem *addr) > { > /* > * We could get an address outside vmalloc range in case > * of ioremap_cache() reusing a RAM mapping. > */ > + return is_vmalloc_addr(addr) ? 0 : -EINVAL; As the generic ioremap only returns vmalloc addresses, this check really should go into common code.