Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759741AbXIBUot (ORCPT ); Sun, 2 Sep 2007 16:44:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750749AbXIBUol (ORCPT ); Sun, 2 Sep 2007 16:44:41 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:37311 "EHLO pentafluge.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750715AbXIBUok (ORCPT ); Sun, 2 Sep 2007 16:44:40 -0400 Date: Mon, 3 Sep 2007 02:27:48 +0530 (IST) From: Satyam Sharma X-X-Sender: satyam@enigma.security.iitk.ac.in To: Jeff Garzik cc: Linux Kernel Mailing List , Alasdair G Kergon , dm-devel@redhat.com, Andrew Morton Subject: Re: [PATCH -mm] drivers/md/: Shut up uninitialized variable warnings In-Reply-To: <46DB1E5C.2080107@garzik.org> Message-ID: References: <46DB1E5C.2080107@garzik.org> MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="464262402-514402326-1188766671=:29617" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2446 Lines: 61 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --464262402-514402326-1188766671=:29617 Content-Type: TEXT/PLAIN; charset=iso-2022-jp On Sun, 2 Sep 2007, Jeff Garzik wrote: > Satyam Sharma wrote: > > drivers/md/dm-exception-store.c: In function ‘persistent_read_metadata’: > > drivers/md/dm-exception-store.c:452: warning: ‘new_snapshot’ may be used > > uninitialized in this function > > > > drivers/md/dm-ioctl.c: In function ‘ctl_ioctl’: > > drivers/md/dm-ioctl.c:1407: warning: ‘param’ may be used uninitialized in > > this function > > > > [ For these, I'd like to especially add -- shame on you, gcc! ] > > > > drivers/md/dm-table.c: In function ‘dm_get_device’: > > drivers/md/dm-table.c:472: warning: ‘dev’ may be used uninitialized in this > > function > > > > are all verified to be bogus warnings. Let's shut them up. > > > > --- > > > > drivers/md/dm-exception-store.c | 3 ++- > > drivers/md/dm-ioctl.c | 2 +- > > drivers/md/dm-table.c | 2 +- > > 3 file changed, 4 insertions(+), 3 deletion(-) > > same comment as with the last uninit'd var patch: these markers should be > used sparingly. Try it on multiple compiler versions, see if it's a new > behavior. > > Quite realistically, you might actually be finding gcc bugs, Definitely -- a lot of these patches are purely a result of gcc's shoddy inadequacies. I do intend filing reports with gcc, however ... > implying the > proper path is to file a gcc bug report (and they are _very_ diligent about > handling these, its impressive) rather than to patch the Linux kernel. My experience (regarding gcc's diligence in dealing with bug reports) has been otherwise :-) Anyway, I once had a _very_ similar discussion with Andrew (regarding some other gcc bug) previously, and the (completely correct) point he made was that: firstly, there's no guarantee they'll get this sorted out asap, and even if they did, we'll still not be dropping support for older gcc versions anyway ... --464262402-514402326-1188766671=:29617-- - 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/