From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754356Ab2KLVfv (ORCPT ); Mon, 12 Nov 2012 16:35:51 -0500 Received: from aserp1040.oracle.com ([141.146.126.69]:24545 "EHLO aserp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753906Ab2KLVT2 (ORCPT ); Mon, 12 Nov 2012 16:19:28 -0500 From: Yinghai Lu To: Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Jacob Shin Cc: Andrew Morton , Stefano Stabellini , Konrad Rzeszutek Wilk , linux-kernel@vger.kernel.org, Yinghai Lu Subject: [PATCH 28/46] x86, mm: Add pointer about Xen mmu requirement for alloc_low_pages Date: Mon, 12 Nov 2012 13:18:24 -0800 Message-Id: <1352755122-25660-29-git-send-email-yinghai@kernel.org> X-Mailer: git-send-email 1.7.7 In-Reply-To: <1352755122-25660-1-git-send-email-yinghai@kernel.org> References: <20121112193044.GA11615@phenom.dumpdata.com> <1352755122-25660-1-git-send-email-yinghai@kernel.org> X-Source-IP: acsinet22.oracle.com [141.146.126.238] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Stefano Stabellini Add link to commit 279b706 for more information Signed-off-by: Yinghai Lu --- arch/x86/mm/init.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c index f5e0120..a7939ed 100644 --- a/arch/x86/mm/init.c +++ b/arch/x86/mm/init.c @@ -25,6 +25,11 @@ unsigned long __meminitdata pgt_buf_top; static unsigned long min_pfn_mapped; +/* + * Pages returned are already directly mapped. + * + * Changing that is likely to break Xen, see commit 279b706 for detail info. + */ __ref void *alloc_low_pages(unsigned int num) { unsigned long pfn; -- 1.7.7