Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759884AbYCERZJ (ORCPT ); Wed, 5 Mar 2008 12:25:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754760AbYCERY5 (ORCPT ); Wed, 5 Mar 2008 12:24:57 -0500 Received: from outbound-va3.frontbridge.com ([216.32.180.16]:34874 "EHLO outbound1-va3-R.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754262AbYCERY4 (ORCPT ); Wed, 5 Mar 2008 12:24:56 -0500 X-BigFish: VP X-MS-Exchange-Organization-Antispam-Report: OrigIP: 139.95.251.11;Service: EHS X-WSS-ID: 0JX9PLP-04-19Q-01 Date: Wed, 5 Mar 2008 18:22:43 +0100 From: Hans Rosenfeld To: Dave Hansen Cc: Matt Mackall , linux-kernel@vger.kernel.org, Adam Litke , nacc , Jon Tollefson , Adam Litke Subject: Re: [RFC][PATCH] make /proc/pid/pagemap work with huge pages and return page size Message-ID: <20080305172243.GB27109@escobedo.amd.com> References: <1203791461.11305.135.camel@nimitz.home.sr71.net> <20080225120951.GA5963@escobedo.amd.com> <1203964750.28196.7.camel@nimitz.home.sr71.net> <20080226202533.GD5963@escobedo.amd.com> <1204134244.5207.28.camel@nimitz.home.sr71.net> <20080305160020 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1204734766.23655.32.camel@nimitz.home.sr71.net> User-Agent: Mutt/1.4.2.3i X-OriginalArrivalTime: 05 Mar 2008 17:21:48.0546 (UTC) FILETIME=[64E5EE20:01C87EE5] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 895 Lines: 24 On Wed, Mar 05, 2008 at 08:32:46AM -0800, Dave Hansen wrote: > Were you able to find any other instances of these bitfields being used > for kernel<->user communication? I did not look at that. > I thought you were going to check to > see if we could depend on the layout, or if it changed between > compilers. But I looked at the ABI specification for i386, powerpc and sparc, where the layout is defined for those architectures. Therefore I assume that we can depend on the bitfield layout, as long as we use compilers that adhere to the ABI specification of an architecture. -- %SYSTEM-F-ANARCHISM, The operating system has been overthrown -- 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/