From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759855Ab3BKUoi (ORCPT ); Mon, 11 Feb 2013 15:44:38 -0500 Received: from mx1.redhat.com ([209.132.183.28]:18794 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758813Ab3BKUoh (ORCPT ); Mon, 11 Feb 2013 15:44:37 -0500 Date: Mon, 11 Feb 2013 15:44:14 -0500 From: Vivek Goyal To: "Hatayama, Daisuke" Cc: "kexec@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "lisa.mitchell@hp.com" , "kumagai-atsushi@mxc.nes.nec.co.jp" , "ebiederm@xmission.com" , "cpw@sgi.com" Subject: Re: [PATCH] kdump, oldmem: support mmap on /dev/oldmem Message-ID: <20130211204414.GA24936@redhat.com> References: <33710E6CAA200E4583255F4FB666C4E20AC36B01@G01JPEXMBYT03> <20130205151256.GB12853@redhat.com> <33710E6CAA200E4583255F4FB666C4E20AC61B3C@G01JPEXMBYT03> <20130207150623.GC6462@redhat.com> <33710E6CAA200E4583255F4FB666C4E20AC6735D@G01JPEXMBYT03> <33710E6CAA200E4583255F4FB666C4E20AC67384@G01JPEXMBYT03> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <33710E6CAA200E4583255F4FB666C4E20AC67384@G01JPEXMBYT03> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 08, 2013 at 12:33:49AM +0000, Hatayama, Daisuke wrote: [..] > Also, remap_pfn_range is the function exported into kernel modules, so changing the third argument means changing ABI. Introducing a kind of remap_pfn_range_64 is a good idea? if there's someone needing the feature on 32-bit kernel. I thought kernel does not care about compatibility with out of tree modules and any user of in-tree module is updated to use new API. I could be wrong though... Thanks Vivek