Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760116AbXF0AZj (ORCPT ); Tue, 26 Jun 2007 20:25:39 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754217AbXF0AZ2 (ORCPT ); Tue, 26 Jun 2007 20:25:28 -0400 Received: from smtp2.linux-foundation.org ([207.189.120.14]:35200 "EHLO smtp2.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753872AbXF0AZZ (ORCPT ); Tue, 26 Jun 2007 20:25:25 -0400 Date: Tue, 26 Jun 2007 17:25:06 -0700 (PDT) From: Linus Torvalds To: Al Viro cc: Neil Booth , Josh Triplett , Segher Boessenkool , linux-kernel@vger.kernel.org, linux-sparse@vger.kernel.org Subject: Re: [PATCH 16/16] fix handling of integer constant expressions In-Reply-To: <20070627001803.GJ21478@ftp.linux.org.uk> Message-ID: References: <20070624174732.GZ21478@ftp.linux.org.uk> <20070624183547.GA21478@ftp.linux.org.uk> <1a25667a20e43a072f733a3ec2b8e79d@kernel.crashing.org> <20070624203837.GE21478@ftp.linux.org.uk> <467F531A.3030702@freedesktop.org> <20070626221040.GI21478@ftp.linux.org.uk> <20070626221134.GA21350@ftp.linux.org.uk> <20070626233226.GO7590@daikokuya.co.uk> <20070627001803.GJ21478@ftp.linux.org.uk> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 774 Lines: 25 On Wed, 27 Jun 2007, Al Viro wrote: > > > extern int a; > > extern int as1[(a = 2)]; > > sparse simply doesn't check that. We don't have anything resembling > support of VLA. Well, the above has two bugs that sparse could notice _independently_ of variable-sized arrays: - assignment outside of a function - variable size array that isn't an automatic variable (strictly speaking, that's not even a variable size - it's a constant 2, just with a non-constant expression - maybe you misread the "=" as an "==") Linus - 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/