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=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no 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 28BE6C11F66 for ; Tue, 13 Jul 2021 21:33:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 07F286135A for ; Tue, 13 Jul 2021 21:33:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235727AbhGMVgI (ORCPT ); Tue, 13 Jul 2021 17:36:08 -0400 Received: from mail3-relais-sop.national.inria.fr ([192.134.164.104]:4727 "EHLO mail3-relais-sop.national.inria.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229478AbhGMVgH (ORCPT ); Tue, 13 Jul 2021 17:36:07 -0400 IronPort-HdrOrdr: =?us-ascii?q?A9a23=3AywMQU6h2J3nGR6e/vqyf7z2903BQXr8ji2hC?= =?us-ascii?q?6mlwRA09TyX4rbHMoB1/73TJYVkqN03I9ervBEDiexPhHPxOgLX5VI3KNGPbUQ?= =?us-ascii?q?CTQL2Kg7GO/wHd?= X-IronPort-AV: E=Sophos;i="5.84,237,1620684000"; d="scan'208";a="387979542" Received: from 173.121.68.85.rev.sfr.net (HELO hadrien) ([85.68.121.173]) by mail3-relais-sop.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Jul 2021 23:33:15 +0200 Date: Tue, 13 Jul 2021 23:33:15 +0200 (CEST) From: Julia Lawall X-X-Sender: jll@hadrien To: Joe Perches cc: cocci , LKML , kernel-janitors@vger.kernel.org Subject: Re: cocci script to convert linux-kernel allocs with BITS_TO_LONGS to bitmap_alloc In-Reply-To: Message-ID: References: <08b89608cfb1280624d1a89ead6547069f9a4c31.camel@perches.com> User-Agent: Alpine 2.22 (DEB 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, 10 Jul 2021, Joe Perches wrote: > On Sat, 2021-07-10 at 21:50 +0200, Julia Lawall wrote: > > On Fri, 9 Jul 2021, Joe Perches wrote: > > > > > Here is a cocci script to convert various types of bitmap allocations > > > that use BITS_TO_LONGS to the more typical bitmap_alloc functions. I see that there is also a bitmap_free. Maybe the rule should be introducing that as well? julia > > > > > > Perhaps something like it could be added to scripts/coccinelle. > > > The diff produced by the script is also below. > > > > > > $ cat bitmap_allocs.cocci > > > // typical uses of bitmap allocations > [] > > > @@ > > > expression val; > > > expression e1; > > > expression e2; > > > @@ > > > > > > - val = kcalloc(BITS_TO_LONGS(e1), sizeof(*val), e2) > > > + val = bitmap_zalloc(e1, e2) > > > > Is there something that guarantees that val has a type that has a size that > > is the same as a long? > > no, but afaict, all do. > > >