Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762871AbYCGJLU (ORCPT ); Fri, 7 Mar 2008 04:11:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761708AbYCGJHa (ORCPT ); Fri, 7 Mar 2008 04:07:30 -0500 Received: from smtp-out04.alice-dsl.net ([88.44.63.6]:44221 "EHLO smtp-out04.alice-dsl.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761012AbYCGJHZ (ORCPT ); Fri, 7 Mar 2008 04:07:25 -0500 From: Andi Kleen References: <200803071007.493903088@firstfloor.org> In-Reply-To: <200803071007.493903088@firstfloor.org> To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH] [2/13] Make get_order(0) return 0 Message-Id: <20080307090712.8CAA21B419C@basil.firstfloor.org> Date: Fri, 7 Mar 2008 10:07:12 +0100 (CET) X-OriginalArrivalTime: 07 Mar 2008 09:00:42.0306 (UTC) FILETIME=[B8D94A20:01C88031] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 899 Lines: 30 This is needed for some followup patches. Some old drivers (like xd.c) pass 0 to get_order and the compat wrapper for the mask allocator doesn't like the resulting underflow. Signed-off-by: Andi Kleen --- include/asm-generic/page.h | 3 +++ 1 file changed, 3 insertions(+) Index: linux/include/asm-generic/page.h =================================================================== --- linux.orig/include/asm-generic/page.h +++ linux/include/asm-generic/page.h @@ -11,6 +11,9 @@ static __inline__ __attribute_const__ in { int order; + if (size == 0) + return 0; + size = (size - 1) >> (PAGE_SHIFT - 1); order = -1; do { -- 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/