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 0DF14C433EF for ; Wed, 15 Jun 2022 06:44:04 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 915E66B0071; Wed, 15 Jun 2022 02:44:04 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 89F426B0072; Wed, 15 Jun 2022 02:44:04 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 766676B0073; Wed, 15 Jun 2022 02:44:04 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0017.hostedemail.com [216.40.44.17]) by kanga.kvack.org (Postfix) with ESMTP id 640DC6B0071 for ; Wed, 15 Jun 2022 02:44:04 -0400 (EDT) Received: from smtpin16.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay06.hostedemail.com (Postfix) with ESMTP id 33A7C35902 for ; Wed, 15 Jun 2022 06:44:04 +0000 (UTC) X-FDA: 79579530408.16.9E41543 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by imf25.hostedemail.com (Postfix) with ESMTP id 53C36A008D for ; Wed, 15 Jun 2022 06:44:03 +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=X1rEC5ALaIx0d2HCn0F/BRl3rZtH5sm1gZYoEirDhT0=; b=upfrVsj4EyeIaKq5NLpH7XMypo j2NNMqh6rsu23p/22yhoKdcZgeY+leAu8Zgq5JVbY/t+9dA5Yeb+V3udY6zfXdDsA7Rq4iRAvr9ZT DsK05XBhDP2pNCIjf/ha16rNdqcEASlC73NiN4LJ4GCTXTkLd4KztPoYUHMHiM7U+bc06qfOPxSbb iOPB2V+QEhQunT9QYsLblws9sHf+AUDud35DkLIXL0DKscaLxrU8fg7sxd6zJHikYMjX3ik/g7JV6 yFqVpbk52teNqSXZ8as9qQUE6KHr42FoCv9CiEpoalrhCNDd7vCG/yrn9/HrD9UrGi+gjK6LhVJkt mNGOmPIA==; Received: from hch by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1o1Mkh-00Ctus-OR; Wed, 15 Jun 2022 06:43:43 +0000 Date: Tue, 14 Jun 2022 23:43:43 -0700 From: Christoph Hellwig To: Wang Wenhu Cc: gregkh@linuxfoundation.org, arnd@arndb.de, hao.wu@intel.com, trix@redhat.com, mdf@kernel.org, yilun.xu@intel.com, bhelgaas@google.com, akpm@linux-foundation.org, linux-fpga@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, christophe.leroy@csgroup.eu, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au Subject: Re: [PATCHv2 2/2] uio:powerpc:mpc85xx: l2-cache-sram uio driver implementation Message-ID: References: <20220615055735.53585-1-wenhu.wang@hotmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1655275443; a=rsa-sha256; cv=none; b=lMELlN/AdF5MDlrU0tjvtD8vmIJok+iMA8dX/KikvADGut4X8dVBLu9rlaM4E9vkT47hC2 PTEDVZzEzXYdW9v3h4bhlwRhjGvAOrMg/p+s8k0Ejpr3i2CWc3Ro3+jtJWYyzSowNV6Wq5 72B7tVqdFL6NRFpoyBFC0TpSvfDUVZY= ARC-Authentication-Results: i=1; imf25.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=upfrVsj4; dmarc=none; spf=none (imf25.hostedemail.com: domain of BATV+cd04db8a85bff7cd13dc+6870+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+cd04db8a85bff7cd13dc+6870+infradead.org+hch@bombadil.srs.infradead.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1655275443; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=X1rEC5ALaIx0d2HCn0F/BRl3rZtH5sm1gZYoEirDhT0=; b=zwoYbKOy2L+4cDLySE0vE50rrciRzZDLqsoDv0/ysN1IHdtJAG9NTDe5ZV6drRF/mHAbzO kyKG+7aZbMxDexzEBKkcfmvKoef8SOeXT9P+MJl2ZWanJGPYYuHZMmSsz5AM5EY9lWfrfk umEYiNmkRimoAsp/AsJroKF3Sww5jTE= X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 53C36A008D X-Stat-Signature: yy8ua6eyp478c6bsbhhzbqp5sp6cs1pk Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=infradead.org header.s=bombadil.20210309 header.b=upfrVsj4; dmarc=none; spf=none (imf25.hostedemail.com: domain of BATV+cd04db8a85bff7cd13dc+6870+infradead.org+hch@bombadil.srs.infradead.org has no SPF policy when checking 198.137.202.133) smtp.mailfrom=BATV+cd04db8a85bff7cd13dc+6870+infradead.org+hch@bombadil.srs.infradead.org X-Rspam-User: X-HE-Tag: 1655275443-111457 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: As pointed out last time: uio is the wrong interface to expose sram, and any kind of ioremap is the wrong way to map it.