From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18832C433E2 for ; Sat, 29 Aug 2020 20:26:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 06638207DF for ; Sat, 29 Aug 2020 20:26:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728509AbgH2U00 (ORCPT ); Sat, 29 Aug 2020 16:26:26 -0400 Received: from mail2-relais-roc.national.inria.fr ([192.134.164.83]:41268 "EHLO mail2-relais-roc.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728416AbgH2U0L (ORCPT ); Sat, 29 Aug 2020 16:26:11 -0400 X-IronPort-AV: E=Sophos;i="5.76,359,1592863200"; d="scan'208";a="465222749" Received: from abo-173-121-68.mrs.modulonet.fr (HELO hadrien) ([85.68.121.173]) by mail2-relais-roc.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Aug 2020 22:26:09 +0200 Date: Sat, 29 Aug 2020 22:26:09 +0200 (CEST) From: Julia Lawall X-X-Sender: jll@hadrien To: Denis Efremov cc: Julia Lawall , Joe Perches , cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org, Kees Cook , "Gustavo A . R . Silva" Subject: Re: [RFC PATCH] coccinelle: misc: add uninitialized_var.cocci script In-Reply-To: Message-ID: References: <20200811210127.11889-1-efremov@linux.com> <489164b541e344f254b70429e4f6d467e1602931.camel@perches.com> User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 29 Aug 2020, Denis Efremov wrote: > > > On 8/29/20 10:48 PM, Julia Lawall wrote: > > > > > > On Sat, 29 Aug 2020, Joe Perches wrote: > > > >> On Sat, 2020-08-29 at 21:36 +0200, Julia Lawall wrote: > >>> > >>> On Wed, 12 Aug 2020, Denis Efremov wrote: > >>> > >>>> Commit 63a0895d960a ("compiler: Remove uninitialized_var() macro") and > >>>> commit 4b19bec97c88 ("docs: deprecated.rst: Add uninitialized_var()") > >>>> removed uninitialized_var() and deprecated it. > >>>> > >>>> The purpose of this script is to prevent new occurrences of open-coded > >>>> variants of uninitialized_var(). > >> > >>>> Cc: Kees Cook > >>>> Cc: Gustavo A. R. Silva > >>>> Signed-off-by: Denis Efremov > >>> > >>> Applied, without the commented out part. > >>> > >>> I only got three warnings, though. Perhaps the others have been fixed? > >> > >> uninitialized_var does not exist in -next > > Yes, and this rule checks for not introducing these initializations once again. > > i.e, checks for: > > int a = a; > > int a = *(&a); > > > > > OK, if it seems better, I can remove it. Out of the threee reported, one > > was a completely unnecessary initialization. > > > > I would like send v2 with better description and link to the documentation because it's > now available online: > https://www.kernel.org/doc/html/latest/process/deprecated.html#uninitialized-var OK, thanks. julia