From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 31 Jan 2008 14:16:10 -0800 (PST) From: Christoph Lameter Subject: Re: mmu_notifier: reduce size of mm_struct if !CONFIG_MMU_NOTIFIER In-Reply-To: Message-ID: References: <20080131045750.855008281@sgi.com> <20080131045812.785269387@sgi.com> <20080131123118.GK7185@v2.random> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org Return-Path: To: Andrea Arcangeli Cc: Robin Holt , Avi Kivity , Izik Eidus , kvm-devel@lists.sourceforge.net, Peter Zijlstra , steiner@sgi.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, daniel.blueman@quadrics.com List-ID: Andrea and Peter had a concern about this. Use an #ifdef to make the mmu_notifer_head structure empty if we have no notifier. That allows the use of the structure in inline functions (which allows parameter verification even if !CONFIG_MMU_NOTIFIER) Signed-off-by: Christoph Lameter --- include/linux/mm_types.h | 2 ++ 1 file changed, 2 insertions(+) Index: linux-2.6/include/linux/mm_types.h =================================================================== --- linux-2.6.orig/include/linux/mm_types.h 2008-01-31 14:03:23.000000000 -0800 +++ linux-2.6/include/linux/mm_types.h 2008-01-31 14:03:38.000000000 -0800 @@ -154,7 +154,9 @@ struct vm_area_struct { }; struct mmu_notifier_head { +#ifdef CONFIG_MMU_NOTIFIER struct hlist_head head; +#endif }; struct mm_struct { -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org