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=-8.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 0C545C07E95 for ; Mon, 19 Jul 2021 20:20:00 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 930186024A for ; Mon, 19 Jul 2021 20:19:59 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 930186024A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=ravnborg.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 32F8189B61; Mon, 19 Jul 2021 20:19:59 +0000 (UTC) Received: from mx1.smtp.larsendata.com (mx1.smtp.larsendata.com [91.221.196.215]) by gabe.freedesktop.org (Postfix) with ESMTPS id 0FD7F89B61 for ; Mon, 19 Jul 2021 20:19:57 +0000 (UTC) Received: from mail01.mxhotel.dk (mail01.mxhotel.dk [91.221.196.236]) by mx1.smtp.larsendata.com (Halon) with ESMTPS id b011205b-e8ce-11eb-9082-0050568c148b; Mon, 19 Jul 2021 20:19:57 +0000 (UTC) Received: from ravnborg.org (80-162-45-141-cable.dk.customer.tdc.net [80.162.45.141]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: sam@ravnborg.org) by mail01.mxhotel.dk (Postfix) with ESMTPSA id 16C58194B23; Mon, 19 Jul 2021 22:20:07 +0200 (CEST) Date: Mon, 19 Jul 2021 22:19:50 +0200 X-Report-Abuse-To: abuse@mxhotel.dk From: Sam Ravnborg To: Xiyu Yang Subject: Re: [PATCH] fbmem: Convert from atomic_t to refcount_t on fb_info->count Message-ID: References: <1626674392-55857-1-git-send-email-xiyuyang19@fudan.edu.cn> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1626674392-55857-1-git-send-email-xiyuyang19@fudan.edu.cn> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Xin Tan , William Kucharski , Arnd Bergmann , Jason Gunthorpe , Tetsuo Handa , Daniel Vetter , yuanxzhang@fudan.edu.cn, "Gustavo A. R. Silva" , Matthew Wilcox , linux-fbdev@vger.kernel.org, George Kennedy , dri-devel@lists.freedesktop.org, Thomas Zimmermann , linux-kernel@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Hi Xiyu, Xin, On Mon, Jul 19, 2021 at 01:59:45PM +0800, Xiyu Yang wrote: > refcount_t type and corresponding API can protect refcounters from > accidental underflow and overflow and further use-after-free situations. > > Signed-off-by: Xiyu Yang > Signed-off-by: Xin Tan Looks like a nice improvement, thanks. Applied to drm-misc-next, it will appear in -next in a week or so. Sam