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 5F558C6FA8E for ; Sun, 5 Mar 2023 20:10:57 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 785456B0071; Sun, 5 Mar 2023 15:10:56 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 7356E6B0073; Sun, 5 Mar 2023 15:10:56 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5FD7A6B0074; Sun, 5 Mar 2023 15:10:56 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0014.hostedemail.com [216.40.44.14]) by kanga.kvack.org (Postfix) with ESMTP id 4F8B06B0071 for ; Sun, 5 Mar 2023 15:10:56 -0500 (EST) Received: from smtpin05.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 13E02AABAE for ; Sun, 5 Mar 2023 20:10:56 +0000 (UTC) X-FDA: 80535938112.05.21A12BF Received: from out5-smtp.messagingengine.com (out5-smtp.messagingengine.com [66.111.4.29]) by imf03.hostedemail.com (Postfix) with ESMTP id F21C62000B for ; Sun, 5 Mar 2023 20:10:53 +0000 (UTC) Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=arndb.de header.s=fm1 header.b=M+iX57D3; dkim=pass header.d=messagingengine.com header.s=fm1 header.b=CYjynxi2; spf=pass (imf03.hostedemail.com: domain of arnd@arndb.de designates 66.111.4.29 as permitted sender) smtp.mailfrom=arnd@arndb.de; dmarc=none ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1678047054; 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:dkim-signature; bh=cjW13UmZQsjwyJDeHx5kIcthGLujwjX/c4OTYrUnVEo=; b=yYDrjk9Q6u8KyoN00E87/o6NORAEtwYWUatG7WwLP61CR88Yq8vA8yqSsoarPnM/U7ScA1 ms7GGUIK8A3i4IWnaWrkWhm5IiC7m0J9F6abEvP+woVd14J1fFjwoVOg1iZxkBdCAR8vdP er89flNYZv4H5zVpnXV5aqrDPpktonM= ARC-Authentication-Results: i=1; imf03.hostedemail.com; dkim=pass header.d=arndb.de header.s=fm1 header.b=M+iX57D3; dkim=pass header.d=messagingengine.com header.s=fm1 header.b=CYjynxi2; spf=pass (imf03.hostedemail.com: domain of arnd@arndb.de designates 66.111.4.29 as permitted sender) smtp.mailfrom=arnd@arndb.de; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1678047054; a=rsa-sha256; cv=none; b=oZyyL//xev4Hj52eUWOutlBY7Qlo+9f5ZIHlZpi+WoHr1eErt0sNkXFtVMZSUmSuZrHv8c +W5G4L/q+IF9r1E1SnG6pSgfguNojYWkXGQQyUZR0w1Z3pnuHH17i6c2E1g7S306E1gB9C u2Lpty3N1lcvcuyOySzhESCeHoqajkI= Received: from compute6.internal (compute6.nyi.internal [10.202.2.47]) by mailout.nyi.internal (Postfix) with ESMTP id 456115C00E6; Sun, 5 Mar 2023 15:10:53 -0500 (EST) Received: from imap51 ([10.202.2.101]) by compute6.internal (MEProxy); Sun, 05 Mar 2023 15:10:53 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=arndb.de; h=cc :cc:content-transfer-encoding:content-type:content-type:date :date:from:from:in-reply-to:in-reply-to:message-id:mime-version :references:reply-to:sender:subject:subject:to:to; s=fm1; t= 1678047053; x=1678133453; bh=cjW13UmZQsjwyJDeHx5kIcthGLujwjX/c4O TYrUnVEo=; b=M+iX57D3tki6mdnYuiW2+/TVDcTnCB2Ga/GIjvvg25JyIDtZhzU mLkYC+yAY4SFZTnNttwjLlO8DD8yCYVw2kqWR6oHe88HECHGwU2I7Axt7fx139oN etVdN33n4Awn9hGCJAMtMjqHAQtx2VRikVcaIkNPJ7OSOLVm6//NltGUsHzgIj37 6Q3ejPZj5Yi2cHI9b414CB+2Y/WNWnifgSj0Gzxyz7KQ4KCQRarWS5CulHYbi5eC ag9J4dSS2qmKbTaLa9/5xYv+fAFL3Yxj7jbc/4GSpKvlOtsPrPUdGxBgQX6SJ5Z/ 5TNCZ2yUU9mfrFdl1+bt1hfGmpR+ALzk/+w== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-transfer-encoding :content-type:content-type:date:date:feedback-id:feedback-id :from:from:in-reply-to:in-reply-to:message-id:mime-version :references:reply-to:sender:subject:subject:to:to:x-me-proxy :x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s=fm1; t= 1678047053; x=1678133453; bh=cjW13UmZQsjwyJDeHx5kIcthGLujwjX/c4O TYrUnVEo=; b=CYjynxi2XdbvcwdySeuJXuc1PmUeES5qN5N0+ACWBaHPfzz2mdY KOtHjXR5RghXHpnlzSUA3NKQ8HzaPRpU50fjVFpJJj2Vy6sGAfy9/jRTA0VzqhBk 8GsAumW0PCYRukJgw9SVPtwhkxwpu7ePss7hnK46F7qIf9wvuoF9/IIYqYHLSQ6S WYeQ8pkNDtW0oDCAUXUKxKH9ooj8BOTq4NG7N1mHccROcNqGiApuSD4gGmN67hlg /JkwqqShEOb8mieY78lGMfW+Gz28CVp4X2Co4shGbu4N41Qb30SR08YRmY/mYRXg wfIYMYkcUjgcGZeIAy669di3WjfqzK4B1xQ== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvhedrvddtgedgudefgecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmd enucfjughrpefofgggkfgjfhffhffvvefutgfgsehtqhertderreejnecuhfhrohhmpedf tehrnhguuceuvghrghhmrghnnhdfuceorghrnhgusegrrhhnuggsrdguvgeqnecuggftrf grthhtvghrnhepgfekueelgeeigefhudduledtkeefffejueelheelfedutedttdfgveeu feefieegnecuffhomhgrihhnpehkvghrnhgvlhdrohhrghenucevlhhushhtvghrufhiii gvpedtnecurfgrrhgrmhepmhgrihhlfhhrohhmpegrrhhnugesrghrnhgusgdruggv X-ME-Proxy: Feedback-ID: i56a14606:Fastmail Received: by mailuser.nyi.internal (Postfix, from userid 501) id 15985B60086; Sun, 5 Mar 2023 15:10:51 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.9.0-alpha0-183-gbf7d00f500-fm-20230220.001-gbf7d00f5 Mime-Version: 1.0 Message-Id: <5dec69d0-0bc9-4f6c-8d0d-ee5422783100@app.fastmail.com> In-Reply-To: References: <20230303102817.212148-1-bhe@redhat.com> <20230303102817.212148-3-bhe@redhat.com> <87sfej1rie.fsf@mpe.ellerman.id.au> Date: Sun, 05 Mar 2023 21:10:31 +0100 From: "Arnd Bergmann" To: "Geert Uytterhoeven" , "Michael Ellerman" Cc: Linux-Arch , "Baoquan He" , linux-sh@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mips@vger.kernel.org, "Christoph Hellwig" , linux-mm@kvack.org, "Luis Chamberlain" , linux-parisc@vger.kernel.org, linux-alpha@vger.kernel.org, sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: Re: [PATCH v3 2/2] arch/*/io.h: remove ioremap_uc in some architectures Content-Type: text/plain;charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Rspamd-Server: rspam03 X-Stat-Signature: iixw8fiuacz4d38jyfdyy74bm4tqxu5f X-Rspamd-Queue-Id: F21C62000B X-HE-Tag: 1678047053-625166 X-HE-Meta: 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 VH4jFqO7 xYjltO4VPQHbwVGGH+8Z145GVLrGoisIT+0Mr9NiSG6/cn15oUCZlvP5MtKLlEbhOZqRPWtcWS6cEkc4CDdaCzRqx4NC3GfAYQyqtl+kzxSvEx2FlVGWn8dsxcdxO9GcawBfvSeITFDFrmndacE7Vn0Y5wtm91BTy1O9xkehkVBlfR5lPk9cfPiCI0qHSAiomZMjUD/zJYYWn6jf5/yF9/Pl47ucVq0+1NsptkVFcx18L6EgLsi2sCG+Y1O3ZdrWSPMLaqZ/EM1qpN7JkCfNDuIF2aE/9CQX9EKlQ3BBIhi2gpM0= 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 Sun, Mar 5, 2023, at 10:29, Geert Uytterhoeven wrote: > > On Sun, Mar 5, 2023 at 10:23=E2=80=AFAM Michael Ellerman wrote: >> Maybe that exact code path is only reachable on x86/ia64? But if so >> please explain why. >> >> Otherwise it looks like this series could break that driver on powerpc >> at least. > > Indeed. When I last looked into this, I sent a patch to use ioremap() on non-x86: https://lore.kernel.org/all/20191111192258.2234502-1-arnd@arndb.de/ Arnd