From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762254AbYDQBJ4 (ORCPT ); Wed, 16 Apr 2008 21:09:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754159AbYDQBHA (ORCPT ); Wed, 16 Apr 2008 21:07:00 -0400 Received: from sous-sol.org ([216.99.217.87]:58784 "EHLO sous-sol.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757904AbYDQBG6 (ORCPT ); Wed, 16 Apr 2008 21:06:58 -0400 Message-Id: <20080417010312.861195068@sous-sol.org> References: <20080417010122.148289106@sous-sol.org> User-Agent: quilt/0.46-1 Date: Wed, 16 Apr 2008 18:01:28 -0700 From: Chris Wright To: linux-kernel@vger.kernel.org, stable@kernel.org, jejb@kernel.org Cc: Justin Forbes , Zwane Mwaikambo , "Theodore Ts'o" , Randy Dunlap , Dave Jones , Chuck Wolber , Chris Wedgwood , Michael Krufky , Chuck Ebbert , Domenico Andreoli , torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Jean-Samuel Chenard , Hans J Koch , Greg Kroah-Hartman Subject: UIO: add pgprot_noncached() to UIO mmap code Content-Disposition: inline; filename=uio-add-pgprot_noncached-to-uio-mmap-code.patch Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org -stable review patch. If anyone has any objections, please let us know. --------------------- From: Jean-Samuel Chenard upstream commit: c9698d6b1a90929e427a165bd8283f803f57d9bd Mapping of physical memory in UIO needs pgprot_noncached() to ensure that IO memory is not cached. Without pgprot_noncached(), it (accidentally) works on x86 and arm, but fails on PPC. Signed-off-by: Jean-Samuel Chenard Signed-off-by: Hans J Koch Signed-off-by: Greg Kroah-Hartman Signed-off-by: Chris Wright --- drivers/uio/uio.c | 2 ++ 1 file changed, 2 insertions(+) --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -447,6 +447,8 @@ static int uio_mmap_physical(struct vm_a vma->vm_flags |= VM_IO | VM_RESERVED; + vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); + return remap_pfn_range(vma, vma->vm_start, idev->info->mem[mi].addr >> PAGE_SHIFT, --