From patchwork Wed Aug 12 07:05:32 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 6997121 Return-Path: X-Original-To: patchwork-linux-parisc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 5F649C05AC for ; Wed, 12 Aug 2015 07:17:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 84A2D20504 for ; Wed, 12 Aug 2015 07:17:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 95C67204E3 for ; Wed, 12 Aug 2015 07:17:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934430AbbHLHRR (ORCPT ); Wed, 12 Aug 2015 03:17:17 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:53114 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965083AbbHLHJW (ORCPT ); Wed, 12 Aug 2015 03:09:22 -0400 Received: from p5de57192.dip0.t-ipconnect.de ([93.229.113.146] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZPQ9z-0001es-RX; Wed, 12 Aug 2015 07:09:16 +0000 From: Christoph Hellwig To: torvalds@linux-foundation.org, axboe@kernel.dk Cc: dan.j.williams@intel.com, vgupta@synopsys.com, hskinnemoen@gmail.com, egtvedt@samfundet.no, realmz6@gmail.com, dhowells@redhat.com, monstr@monstr.eu, x86@kernel.org, dwmw2@infradead.org, alex.williamson@redhat.com, grundler@parisc-linux.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-alpha@vger.kernel.org, linux-ia64@vger.kernel.org, linux-metag@vger.kernel.org, linux-mips@linux-mips.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-xtensa@linux-xtensa.org, linux-nvdimm@ml01.01.org, linux-media@vger.kernel.org Subject: [PATCH 13/31] sparc/ldc: handle page-less SG entries Date: Wed, 12 Aug 2015 09:05:32 +0200 Message-Id: <1439363150-8661-14-git-send-email-hch@lst.de> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1439363150-8661-1-git-send-email-hch@lst.de> References: <1439363150-8661-1-git-send-email-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Use sg_phys(sg) & PAGE_MASK instead of page_to_pfn(sg_page(sg)) << PAGE_SHIFT to get at the page-aligned physical address ofa SG entry, so that we don't require a page backing for SG entries. Signed-off-by: Christoph Hellwig --- arch/sparc/kernel/ldc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/sparc/kernel/ldc.c b/arch/sparc/kernel/ldc.c index 1ae5eb1..0a29974 100644 --- a/arch/sparc/kernel/ldc.c +++ b/arch/sparc/kernel/ldc.c @@ -2051,7 +2051,7 @@ static void fill_cookies(struct cookie_state *sp, unsigned long pa, static int sg_count_one(struct scatterlist *sg) { - unsigned long base = page_to_pfn(sg_page(sg)) << PAGE_SHIFT; + unsigned long base = sg_phys(sg) & PAGE_MASK; long len = sg->length; if ((sg->offset | len) & (8UL - 1)) @@ -2114,7 +2114,7 @@ int ldc_map_sg(struct ldc_channel *lp, state.nc = 0; for_each_sg(sg, s, num_sg, i) { - fill_cookies(&state, page_to_pfn(sg_page(s)) << PAGE_SHIFT, + fill_cookies(&state, sg_phys(s) & PAGE_MASK, s->offset, s->length); }