From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965793AbXCVGEg (ORCPT ); Thu, 22 Mar 2007 02:04:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965819AbXCVGEJ (ORCPT ); Thu, 22 Mar 2007 02:04:09 -0400 Received: from ozlabs.org ([203.10.76.45]:57911 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965826AbXCVGEF (ORCPT ); Thu, 22 Mar 2007 02:04:05 -0400 To: Linux Memory Management CC: From: Benjamin Herrenschmidt Date: Thu, 22 Mar 2007 17:01:27 +1100 Subject: [RFC/PATCH 11/15] get_unmapped_area handles MAP_FIXED on ramfs (nommu) In-Reply-To: <1174543217.531981.572863804039.qpush@grosgo> Message-Id: <20070322060301.DD1A6DE411@ozlabs.org> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Benjamin Herrenschmidt --- fs/ramfs/file-nommu.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) Index: linux-cell/fs/ramfs/file-nommu.c =================================================================== --- linux-cell.orig/fs/ramfs/file-nommu.c 2007-03-22 16:18:27.000000000 +1100 +++ linux-cell/fs/ramfs/file-nommu.c 2007-03-22 16:20:14.000000000 +1100 @@ -238,7 +238,10 @@ unsigned long ramfs_nommu_get_unmapped_a struct page **pages = NULL, **ptr, *page; loff_t isize; - if (!(flags & MAP_SHARED)) + /* Deal with MAP_FIXED differently ? Forbid it ? Need help from some nommu + * folks there... --BenH. + */ + if ((flags & MAP_FIXED) || !(flags & MAP_SHARED)) return addr; /* the mapping mustn't extend beyond the EOF */