From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965994AbbLPQ4m (ORCPT ); Wed, 16 Dec 2015 11:56:42 -0500 Received: from foss.arm.com ([217.140.101.70]:56725 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965927AbbLPQ4l (ORCPT ); Wed, 16 Dec 2015 11:56:41 -0500 From: Brian Starkey To: gregkh@linuxfoundation.org Cc: catalin.marinas@arm.com, dan.j.williams@intel.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH 0/3] Add MEMREMAP_WC to fix dma_init_coherent_memory Date: Wed, 16 Dec 2015 16:56:03 +0000 Message-Id: <1450284966-25369-1-git-send-email-brian.starkey@arm.com> X-Mailer: git-send-email 1.7.9.5 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, As discussed here[1], these patches implement a MEMREMAP_WC flag for memremap(), which can be used to obtain writecombine mappings. This is then used for setting up dma_coherent_mem regions which use the DMA_MEMORY_MAP flag. Patch 3 makes sure that the appropriate memset function is used when zeroing coherent allocations, which fixes an alignment fault on arm64. Best Regards, Brian [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-December/390857.html Brian Starkey (3): memremap: add MEMREMAP_WC flag drivers: dma-coherent: use MEMREMAP_WC for DMA_MEMORY_MAP drivers: dma-coherent: use memset_io for DMA_MEMORY_IO drivers/base/dma-coherent.c | 25 ++++++++++++++++++++----- include/linux/io.h | 1 + kernel/memremap.c | 15 +++++++++++++-- 3 files changed, 34 insertions(+), 7 deletions(-)