From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2992978AbXCIF5a (ORCPT ); Fri, 9 Mar 2007 00:57:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S2992988AbXCIF5a (ORCPT ); Fri, 9 Mar 2007 00:57:30 -0500 Received: from ozlabs.org ([203.10.76.45]:54137 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2992978AbXCIF53 (ORCPT ); Fri, 9 Mar 2007 00:57:29 -0500 Subject: [PATCH] Use more gcc extensions in the Linux headers From: Rusty Russell To: lkml - Kernel Mailing List Cc: Linus Torvalds , Andrew Morton Content-Type: text/plain Date: Fri, 09 Mar 2007 16:56:32 +1100 Message-Id: <1173419792.32234.131.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.8.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org __builtin_types_compatible_p() has been around since gcc 2.95, and we don't use it anywhere. This patch quietly fixes that. Signed-off-by: Rusty Russell diff -r f0ff8138f993 include/linux/kernel.h --- a/include/linux/kernel.h Fri Mar 09 16:40:25 2007 +1100 +++ b/include/linux/kernel.h Fri Mar 09 16:44:04 2007 +1100 @@ -35,7 +35,9 @@ extern const char linux_proc_banner[]; #define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1) #define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask)) -#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) +#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]) \ + + sizeof(typeof(int[1 - 2*!!__builtin_types_compatible_p(typeof(arr), \ + typeof(&arr[0]))]))*0) #define FIELD_SIZEOF(t, f) (sizeof(((t*)0)->f)) #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d)) #define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y))