Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262552AbVE0T0n (ORCPT ); Fri, 27 May 2005 15:26:43 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262553AbVE0T0n (ORCPT ); Fri, 27 May 2005 15:26:43 -0400 Received: from rrcs-24-227-247-8.sw.biz.rr.com ([24.227.247.8]:59321 "EHLO emachine.austin.ammasso.com") by vger.kernel.org with ESMTP id S262552AbVE0T0l (ORCPT ); Fri, 27 May 2005 15:26:41 -0400 Message-ID: <4297746C.10900@ammasso.com> Date: Fri, 27 May 2005 14:26:36 -0500 From: Timur Tabi Reply-To: linux-kernel@vger.kernel.org Organization: Ammasso User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041217 Mnenhy/0.7.2.0 X-Accept-Language: en-us, en, en-gb MIME-Version: 1.0 To: linux-kernel@vger.kernel.org Subject: Will __pa(vmalloc()) ever work? Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 865 Lines: 21 I have a driver that calls __pa() on an address obtained via vmalloc(). This is not supposed to work, and yet oddly it appears to. Is there a possibility, even a remote one, that __pa() will return the correct physical address for a buffer returned by the vmalloc() function? Also, does the pgd/pmd/pte page-table walking work on addresses returned by kmalloc(), or do I have to use __pa() to get the physical address? -- Timur Tabi Staff Software Engineer timur.tabi@ammasso.com One thing a Southern boy will never say is, "I don't think duct tape will fix it." -- Ed Smylie, NASA engineer for Apollo 13 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/