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=-5.0 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 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 ABC05C433E3 for ; Tue, 18 Aug 2020 21:00:53 +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 816BE2065D for ; Tue, 18 Aug 2020 21:00:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=hansenpartnership.com header.i=@hansenpartnership.com header.b="Qrj9DcFV"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=hansenpartnership.com header.i=@hansenpartnership.com header.b="D+8/Cr58" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 816BE2065D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=HansenPartnership.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 280C689A9F; Tue, 18 Aug 2020 21:00:49 +0000 (UTC) Received: from bedivere.hansenpartnership.com (bedivere.hansenpartnership.com [66.63.167.143]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5377889A8C; Tue, 18 Aug 2020 21:00:48 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by bedivere.hansenpartnership.com (Postfix) with ESMTP id E76FB8EE1A9; Tue, 18 Aug 2020 14:00:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hansenpartnership.com; s=20151216; t=1597784444; bh=tbsUcv475+YCZw1GTj2PQ6LvX4vSQZaYxn4zaS+R/4c=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=Qrj9DcFVwfv3LQ3ogFCLogZ3MFRIrVuZOGzCtGnuXEksHbYpCf4MOzhnjK48hnLeJ WBJIwZcuhQRmEISK3OYmfO8zwCeV5WGheC1BlogkcVwtiUSnVqiZDKUeoZ3ftkI0DB 8C1HptXhFOQveW6XttTml0y/WCVpA+LP1XIfDIQU= Received: from bedivere.hansenpartnership.com ([127.0.0.1]) by localhost (bedivere.hansenpartnership.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yxTvzG0VvDFx; Tue, 18 Aug 2020 14:00:43 -0700 (PDT) Received: from [153.66.254.174] (c-73-35-198-56.hsd1.wa.comcast.net [73.35.198.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bedivere.hansenpartnership.com (Postfix) with ESMTPSA id 3908A8EE17F; Tue, 18 Aug 2020 14:00:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hansenpartnership.com; s=20151216; t=1597784443; bh=tbsUcv475+YCZw1GTj2PQ6LvX4vSQZaYxn4zaS+R/4c=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=D+8/Cr58B/oiGrsp2scAFTKzPpwuRrxI0nzk9/FGC1mH6aV1pe7T9eKYXHzydxf7e uxoPDcWpTJmWe7T3PSHxKLwqMdOy0OFGWtWHPKks90yqeWzrewWrtu8v+gZ22+Y9Xp 3BintrUiXfYlFbDYGCbt6iSJyrOyqS5V85WlObHk= Message-ID: <1597784438.3978.6.camel@HansenPartnership.com> From: James Bottomley To: Kees Cook Date: Tue, 18 Aug 2020 14:00:38 -0700 In-Reply-To: <202008181309.FD3940A2D5@keescook> References: <20200817091617.28119-1-allen.cryptic@gmail.com> <20200817091617.28119-2-allen.cryptic@gmail.com> <202008171228.29E6B3BB@keescook> <161b75f1-4e88-dcdf-42e8-b22504d7525c@kernel.dk> <202008171246.80287CDCA@keescook> <1597780833.3978.3.camel@HansenPartnership.com> <202008181309.FD3940A2D5@keescook> X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Subject: Re: [Intel-gfx] [PATCH] block: convert tasklets to use new tasklet_setup() API X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ulf.hansson@linaro.org, linux-atm-general@lists.sourceforge.net, manohar.vanga@gmail.com, airlied@linux.ie, Allen Pais , linux-hyperv@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kys@microsoft.com, anton.ivanov@cambridgegreys.com, devel@driverdev.osuosl.org, linux-s390@vger.kernel.org, linux1394-devel@lists.sourceforge.net, maximlevitsky@gmail.com, richard@nod.at, deller@gmx.de, jassisinghbrar@gmail.com, 3chas3@gmail.com, intel-gfx@lists.freedesktop.org, kuba@kernel.org, mporter@kernel.crashing.org, jdike@addtoit.com, oakad@yahoo.com, s.hauer@pengutronix.de, linux-input@vger.kernel.org, linux-um@lists.infradead.org, linux-block@vger.kernel.org, broonie@kernel.org, openipmi-developer@lists.sourceforge.net, mitch@sfgoth.com, linux-arm-kernel@lists.infradead.org, Jens Axboe , linux-parisc@vger.kernel.org, netdev@vger.kernel.org, martyn@welchs.me.uk, dmitry.torokhov@gmail.com, linux-mmc@vger.kernel.org, sre@kernel.org, linux-spi@vger.kernel.org, alex.bou9@gmail.com, Allen Pais , stefanr@s5r6.in-berlin.de, linux-ntb@googlegroups.com, Romain Perier , shawnguo@kernel.org, davem@davemloft.net Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" On Tue, 2020-08-18 at 13:10 -0700, Kees Cook wrote: > On Tue, Aug 18, 2020 at 01:00:33PM -0700, James Bottomley wrote: > > On Mon, 2020-08-17 at 13:02 -0700, Jens Axboe wrote: > > > On 8/17/20 12:48 PM, Kees Cook wrote: > > > > On Mon, Aug 17, 2020 at 12:44:34PM -0700, Jens Axboe wrote: > > > > > On 8/17/20 12:29 PM, Kees Cook wrote: > > > > > > On Mon, Aug 17, 2020 at 06:56:47AM -0700, Jens Axboe wrote: > > > > > > > On 8/17/20 2:15 AM, Allen Pais wrote: > > > > > > > > From: Allen Pais > > > > > > > > > > > > > > > > In preparation for unconditionally passing the > > > > > > > > struct tasklet_struct pointer to all tasklet > > > > > > > > callbacks, switch to using the new tasklet_setup() > > > > > > > > and from_tasklet() to pass the tasklet pointer > > > > > > > > explicitly. > > > > > > > > > > > > > > Who came up with the idea to add a macro 'from_tasklet' > > > > > > > that > > > > > > > is just container_of? container_of in the code would be > > > > > > > _much_ more readable, and not leave anyone guessing wtf > > > > > > > from_tasklet is doing. > > > > > > > > > > > > > > I'd fix that up now before everything else goes in... > > > > > > > > > > > > As I mentioned in the other thread, I think this makes > > > > > > things > > > > > > much more readable. It's the same thing that the > > > > > > timer_struct > > > > > > conversion did (added a container_of wrapper) to avoid the > > > > > > ever-repeating use of typeof(), long lines, etc. > > > > > > > > > > But then it should use a generic name, instead of each sub- > > > > > system > > > > > using some random name that makes people look up exactly what > > > > > it > > > > > does. I'm not huge fan of the container_of() redundancy, but > > > > > adding private variants of this doesn't seem like the best > > > > > way > > > > > forward. Let's have a generic helper that does this, and use > > > > > it > > > > > everywhere. > > > > > > > > I'm open to suggestions, but as things stand, these kinds of > > > > treewide > > > > > > On naming? Implementation is just as it stands, from_tasklet() is > > > totally generic which is why I objected to it. from_member()? Not > > > great with naming... But I can see this going further and then > > > we'll > > > suddenly have tons of these. It's not good for readability. > > > > Since both threads seem to have petered out, let me suggest in > > kernel.h: > > > > #define cast_out(ptr, container, member) \ > > container_of(ptr, typeof(*container), member) > > > > It does what you want, the argument order is the same as > > container_of with the only difference being you name the containing > > structure instead of having to specify its type. > > I like this! Shall I send this to Linus to see if this can land in > -rc2 for use going forward? Sure ... he's probably been lurking on this thread anyway ... it's about time he got off his arse^Wthe fence and made an executive decision ... James _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/intel-gfx 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=-5.1 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_2 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 AF2CFC433E3 for ; Tue, 18 Aug 2020 21:00:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8B685205CB for ; Tue, 18 Aug 2020 21:00:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=hansenpartnership.com header.i=@hansenpartnership.com header.b="Qrj9DcFV"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=hansenpartnership.com header.i=@hansenpartnership.com header.b="D+8/Cr58" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726829AbgHRVAt (ORCPT ); Tue, 18 Aug 2020 17:00:49 -0400 Received: from bedivere.hansenpartnership.com ([66.63.167.143]:56308 "EHLO bedivere.hansenpartnership.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726790AbgHRVAs (ORCPT ); Tue, 18 Aug 2020 17:00:48 -0400 Received: from localhost (localhost [127.0.0.1]) by bedivere.hansenpartnership.com (Postfix) with ESMTP id E76FB8EE1A9; Tue, 18 Aug 2020 14:00:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hansenpartnership.com; s=20151216; t=1597784444; bh=tbsUcv475+YCZw1GTj2PQ6LvX4vSQZaYxn4zaS+R/4c=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=Qrj9DcFVwfv3LQ3ogFCLogZ3MFRIrVuZOGzCtGnuXEksHbYpCf4MOzhnjK48hnLeJ WBJIwZcuhQRmEISK3OYmfO8zwCeV5WGheC1BlogkcVwtiUSnVqiZDKUeoZ3ftkI0DB 8C1HptXhFOQveW6XttTml0y/WCVpA+LP1XIfDIQU= Received: from bedivere.hansenpartnership.com ([127.0.0.1]) by localhost (bedivere.hansenpartnership.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yxTvzG0VvDFx; Tue, 18 Aug 2020 14:00:43 -0700 (PDT) Received: from [153.66.254.174] (c-73-35-198-56.hsd1.wa.comcast.net [73.35.198.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bedivere.hansenpartnership.com (Postfix) with ESMTPSA id 3908A8EE17F; Tue, 18 Aug 2020 14:00:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hansenpartnership.com; s=20151216; t=1597784443; bh=tbsUcv475+YCZw1GTj2PQ6LvX4vSQZaYxn4zaS+R/4c=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=D+8/Cr58B/oiGrsp2scAFTKzPpwuRrxI0nzk9/FGC1mH6aV1pe7T9eKYXHzydxf7e uxoPDcWpTJmWe7T3PSHxKLwqMdOy0OFGWtWHPKks90yqeWzrewWrtu8v+gZ22+Y9Xp 3BintrUiXfYlFbDYGCbt6iSJyrOyqS5V85WlObHk= Message-ID: <1597784438.3978.6.camel@HansenPartnership.com> Subject: Re: [PATCH] block: convert tasklets to use new tasklet_setup() API From: James Bottomley To: Kees Cook Cc: Jens Axboe , Allen Pais , jdike@addtoit.com, richard@nod.at, anton.ivanov@cambridgegreys.com, 3chas3@gmail.com, stefanr@s5r6.in-berlin.de, airlied@linux.ie, daniel@ffwll.ch, sre@kernel.org, kys@microsoft.com, deller@gmx.de, dmitry.torokhov@gmail.com, jassisinghbrar@gmail.com, shawnguo@kernel.org, s.hauer@pengutronix.de, maximlevitsky@gmail.com, oakad@yahoo.com, ulf.hansson@linaro.org, mporter@kernel.crashing.org, alex.bou9@gmail.com, broonie@kernel.org, martyn@welchs.me.uk, manohar.vanga@gmail.com, mitch@sfgoth.com, davem@davemloft.net, kuba@kernel.org, linux-um@lists.infradead.org, linux-kernel@vger.kernel.org, linux-atm-general@lists.sourceforge.net, netdev@vger.kernel.org, linux-block@vger.kernel.org, linux-arm-kernel@lists.infradead.org, openipmi-developer@lists.sourceforge.net, linux1394-devel@lists.sourceforge.net, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-hyperv@vger.kernel.org, linux-parisc@vger.kernel.org, linux-input@vger.kernel.org, linux-mmc@vger.kernel.org, linux-ntb@googlegroups.com, linux-s390@vger.kernel.org, linux-spi@vger.kernel.org, devel@driverdev.osuosl.org, Allen Pais , Romain Perier Date: Tue, 18 Aug 2020 14:00:38 -0700 In-Reply-To: <202008181309.FD3940A2D5@keescook> References: <20200817091617.28119-1-allen.cryptic@gmail.com> <20200817091617.28119-2-allen.cryptic@gmail.com> <202008171228.29E6B3BB@keescook> <161b75f1-4e88-dcdf-42e8-b22504d7525c@kernel.dk> <202008171246.80287CDCA@keescook> <1597780833.3978.3.camel@HansenPartnership.com> <202008181309.FD3940A2D5@keescook> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Tue, 2020-08-18 at 13:10 -0700, Kees Cook wrote: > On Tue, Aug 18, 2020 at 01:00:33PM -0700, James Bottomley wrote: > > On Mon, 2020-08-17 at 13:02 -0700, Jens Axboe wrote: > > > On 8/17/20 12:48 PM, Kees Cook wrote: > > > > On Mon, Aug 17, 2020 at 12:44:34PM -0700, Jens Axboe wrote: > > > > > On 8/17/20 12:29 PM, Kees Cook wrote: > > > > > > On Mon, Aug 17, 2020 at 06:56:47AM -0700, Jens Axboe wrote: > > > > > > > On 8/17/20 2:15 AM, Allen Pais wrote: > > > > > > > > From: Allen Pais > > > > > > > > > > > > > > > > In preparation for unconditionally passing the > > > > > > > > struct tasklet_struct pointer to all tasklet > > > > > > > > callbacks, switch to using the new tasklet_setup() > > > > > > > > and from_tasklet() to pass the tasklet pointer > > > > > > > > explicitly. > > > > > > > > > > > > > > Who came up with the idea to add a macro 'from_tasklet' > > > > > > > that > > > > > > > is just container_of? container_of in the code would be > > > > > > > _much_ more readable, and not leave anyone guessing wtf > > > > > > > from_tasklet is doing. > > > > > > > > > > > > > > I'd fix that up now before everything else goes in... > > > > > > > > > > > > As I mentioned in the other thread, I think this makes > > > > > > things > > > > > > much more readable. It's the same thing that the > > > > > > timer_struct > > > > > > conversion did (added a container_of wrapper) to avoid the > > > > > > ever-repeating use of typeof(), long lines, etc. > > > > > > > > > > But then it should use a generic name, instead of each sub- > > > > > system > > > > > using some random name that makes people look up exactly what > > > > > it > > > > > does. I'm not huge fan of the container_of() redundancy, but > > > > > adding private variants of this doesn't seem like the best > > > > > way > > > > > forward. Let's have a generic helper that does this, and use > > > > > it > > > > > everywhere. > > > > > > > > I'm open to suggestions, but as things stand, these kinds of > > > > treewide > > > > > > On naming? Implementation is just as it stands, from_tasklet() is > > > totally generic which is why I objected to it. from_member()? Not > > > great with naming... But I can see this going further and then > > > we'll > > > suddenly have tons of these. It's not good for readability. > > > > Since both threads seem to have petered out, let me suggest in > > kernel.h: > > > > #define cast_out(ptr, container, member) \ > > container_of(ptr, typeof(*container), member) > > > > It does what you want, the argument order is the same as > > container_of with the only difference being you name the containing > > structure instead of having to specify its type. > > I like this! Shall I send this to Linus to see if this can land in > -rc2 for use going forward? Sure ... he's probably been lurking on this thread anyway ... it's about time he got off his arse^Wthe fence and made an executive decision ... James From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <1597784438.3978.6.camel@HansenPartnership.com> Subject: Re: [PATCH] block: convert tasklets to use new tasklet_setup() API From: James Bottomley Date: Tue, 18 Aug 2020 14:00:38 -0700 In-Reply-To: <202008181309.FD3940A2D5@keescook> References: <20200817091617.28119-1-allen.cryptic@gmail.com> <20200817091617.28119-2-allen.cryptic@gmail.com> <202008171228.29E6B3BB@keescook> <161b75f1-4e88-dcdf-42e8-b22504d7525c@kernel.dk> <202008171246.80287CDCA@keescook> <1597780833.3978.3.camel@HansenPartnership.com> <202008181309.FD3940A2D5@keescook> Mime-Version: 1.0 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-um" Errors-To: linux-um-bounces+geert=linux-m68k.org@lists.infradead.org To: Kees Cook Cc: ulf.hansson@linaro.org, linux-atm-general@lists.sourceforge.net, manohar.vanga@gmail.com, airlied@linux.ie, Allen Pais , linux-hyperv@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kys@microsoft.com, anton.ivanov@cambridgegreys.com, devel@driverdev.osuosl.org, linux-s390@vger.kernel.org, linux1394-devel@lists.sourceforge.net, maximlevitsky@gmail.com, richard@nod.at, deller@gmx.de, jassisinghbrar@gmail.com, 3chas3@gmail.com, intel-gfx@lists.freedesktop.org, kuba@kernel.org, mporter@kernel.crashing.org, jdike@addtoit.com, oakad@yahoo.com, s.hauer@pengutronix.de, linux-input@vger.kernel.org, linux-um@lists.infradead.org, linux-block@vger.kernel.org, broonie@kernel.org, openipmi-developer@lists.sourceforge.net, mitch@sfgoth.com, linux-arm-kernel@lists.infradead.org, Jens Axboe , linux-parisc@vger.kernel.org, netdev@vger.kernel.org, martyn@welchs.me.uk, dmitry.torokhov@gmail.com, linux-mmc@vger.kernel.org, sre@kernel.org, linux-spi@vger.kernel.org, alex.bou9@gmail.com, Allen Pais , stefanr@s5r6.in-berlin.de, daniel@ffwll.ch, linux-ntb@googlegroups.com, Romain Perier , shawnguo@kernel.org, davem@davemloft.net On Tue, 2020-08-18 at 13:10 -0700, Kees Cook wrote: > On Tue, Aug 18, 2020 at 01:00:33PM -0700, James Bottomley wrote: > > On Mon, 2020-08-17 at 13:02 -0700, Jens Axboe wrote: > > > On 8/17/20 12:48 PM, Kees Cook wrote: > > > > On Mon, Aug 17, 2020 at 12:44:34PM -0700, Jens Axboe wrote: > > > > > On 8/17/20 12:29 PM, Kees Cook wrote: > > > > > > On Mon, Aug 17, 2020 at 06:56:47AM -0700, Jens Axboe wrote: > > > > > > > On 8/17/20 2:15 AM, Allen Pais wrote: > > > > > > > > From: Allen Pais > > > > > > > > > > > > > > > > In preparation for unconditionally passing the > > > > > > > > struct tasklet_struct pointer to all tasklet > > > > > > > > callbacks, switch to using the new tasklet_setup() > > > > > > > > and from_tasklet() to pass the tasklet pointer > > > > > > > > explicitly. > > > > > > > > > > > > > > Who came up with the idea to add a macro 'from_tasklet' > > > > > > > that > > > > > > > is just container_of? container_of in the code would be > > > > > > > _much_ more readable, and not leave anyone guessing wtf > > > > > > > from_tasklet is doing. > > > > > > > > > > > > > > I'd fix that up now before everything else goes in... > > > > > > > > > > > > As I mentioned in the other thread, I think this makes > > > > > > things > > > > > > much more readable. It's the same thing that the > > > > > > timer_struct > > > > > > conversion did (added a container_of wrapper) to avoid the > > > > > > ever-repeating use of typeof(), long lines, etc. > > > > > > > > > > But then it should use a generic name, instead of each sub- > > > > > system > > > > > using some random name that makes people look up exactly what > > > > > it > > > > > does. I'm not huge fan of the container_of() redundancy, but > > > > > adding private variants of this doesn't seem like the best > > > > > way > > > > > forward. Let's have a generic helper that does this, and use > > > > > it > > > > > everywhere. > > > > > > > > I'm open to suggestions, but as things stand, these kinds of > > > > treewide > > > > > > On naming? Implementation is just as it stands, from_tasklet() is > > > totally generic which is why I objected to it. from_member()? Not > > > great with naming... But I can see this going further and then > > > we'll > > > suddenly have tons of these. It's not good for readability. > > > > Since both threads seem to have petered out, let me suggest in > > kernel.h: > > > > #define cast_out(ptr, container, member) \ > > container_of(ptr, typeof(*container), member) > > > > It does what you want, the argument order is the same as > > container_of with the only difference being you name the containing > > structure instead of having to specify its type. > > I like this! Shall I send this to Linus to see if this can land in > -rc2 for use going forward? Sure ... he's probably been lurking on this thread anyway ... it's about time he got off his arse^Wthe fence and made an executive decision ... James _______________________________________________ linux-um mailing list linux-um@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-um 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,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 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 BB551C433E1 for ; Tue, 18 Aug 2020 21:02:27 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 78FD220709 for ; Tue, 18 Aug 2020 21:02:27 +0000 (UTC) Authentication-Results: mail.kernel.org; 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s=20151216; t=1597784444; bh=tbsUcv475+YCZw1GTj2PQ6LvX4vSQZaYxn4zaS+R/4c=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=Qrj9DcFVwfv3LQ3ogFCLogZ3MFRIrVuZOGzCtGnuXEksHbYpCf4MOzhnjK48hnLeJ WBJIwZcuhQRmEISK3OYmfO8zwCeV5WGheC1BlogkcVwtiUSnVqiZDKUeoZ3ftkI0DB 8C1HptXhFOQveW6XttTml0y/WCVpA+LP1XIfDIQU= Received: from bedivere.hansenpartnership.com ([127.0.0.1]) by localhost (bedivere.hansenpartnership.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yxTvzG0VvDFx; Tue, 18 Aug 2020 14:00:43 -0700 (PDT) Received: from [153.66.254.174] (c-73-35-198-56.hsd1.wa.comcast.net [73.35.198.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bedivere.hansenpartnership.com (Postfix) with ESMTPSA id 3908A8EE17F; Tue, 18 Aug 2020 14:00:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hansenpartnership.com; s=20151216; t=1597784443; bh=tbsUcv475+YCZw1GTj2PQ6LvX4vSQZaYxn4zaS+R/4c=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=D+8/Cr58B/oiGrsp2scAFTKzPpwuRrxI0nzk9/FGC1mH6aV1pe7T9eKYXHzydxf7e uxoPDcWpTJmWe7T3PSHxKLwqMdOy0OFGWtWHPKks90yqeWzrewWrtu8v+gZ22+Y9Xp 3BintrUiXfYlFbDYGCbt6iSJyrOyqS5V85WlObHk= Message-ID: <1597784438.3978.6.camel@HansenPartnership.com> Subject: Re: [PATCH] block: convert tasklets to use new tasklet_setup() API From: James Bottomley To: Kees Cook Date: Tue, 18 Aug 2020 14:00:38 -0700 In-Reply-To: <202008181309.FD3940A2D5@keescook> References: <20200817091617.28119-1-allen.cryptic@gmail.com> <20200817091617.28119-2-allen.cryptic@gmail.com> <202008171228.29E6B3BB@keescook> <161b75f1-4e88-dcdf-42e8-b22504d7525c@kernel.dk> <202008171246.80287CDCA@keescook> <1597780833.3978.3.camel@HansenPartnership.com> <202008181309.FD3940A2D5@keescook> X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200818_170049_201600_5B0CA44A X-CRM114-Status: GOOD ( 34.53 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ulf.hansson@linaro.org, linux-atm-general@lists.sourceforge.net, manohar.vanga@gmail.com, airlied@linux.ie, Allen Pais , linux-hyperv@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kys@microsoft.com, anton.ivanov@cambridgegreys.com, devel@driverdev.osuosl.org, linux-s390@vger.kernel.org, linux1394-devel@lists.sourceforge.net, maximlevitsky@gmail.com, richard@nod.at, deller@gmx.de, jassisinghbrar@gmail.com, 3chas3@gmail.com, intel-gfx@lists.freedesktop.org, kuba@kernel.org, mporter@kernel.crashing.org, jdike@addtoit.com, oakad@yahoo.com, s.hauer@pengutronix.de, linux-input@vger.kernel.org, linux-um@lists.infradead.org, linux-block@vger.kernel.org, broonie@kernel.org, openipmi-developer@lists.sourceforge.net, mitch@sfgoth.com, linux-arm-kernel@lists.infradead.org, Jens Axboe , linux-parisc@vger.kernel.org, netdev@vger.kernel.org, martyn@welchs.me.uk, dmitry.torokhov@gmail.com, linux-mmc@vger.kernel.org, sre@kernel.org, linux-spi@vger.kernel.org, alex.bou9@gmail.com, Allen Pais , stefanr@s5r6.in-berlin.de, daniel@ffwll.ch, linux-ntb@googlegroups.com, Romain Perier , shawnguo@kernel.org, davem@davemloft.net Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, 2020-08-18 at 13:10 -0700, Kees Cook wrote: > On Tue, Aug 18, 2020 at 01:00:33PM -0700, James Bottomley wrote: > > On Mon, 2020-08-17 at 13:02 -0700, Jens Axboe wrote: > > > On 8/17/20 12:48 PM, Kees Cook wrote: > > > > On Mon, Aug 17, 2020 at 12:44:34PM -0700, Jens Axboe wrote: > > > > > On 8/17/20 12:29 PM, Kees Cook wrote: > > > > > > On Mon, Aug 17, 2020 at 06:56:47AM -0700, Jens Axboe wrote: > > > > > > > On 8/17/20 2:15 AM, Allen Pais wrote: > > > > > > > > From: Allen Pais > > > > > > > > > > > > > > > > In preparation for unconditionally passing the > > > > > > > > struct tasklet_struct pointer to all tasklet > > > > > > > > callbacks, switch to using the new tasklet_setup() > > > > > > > > and from_tasklet() to pass the tasklet pointer > > > > > > > > explicitly. > > > > > > > > > > > > > > Who came up with the idea to add a macro 'from_tasklet' > > > > > > > that > > > > > > > is just container_of? container_of in the code would be > > > > > > > _much_ more readable, and not leave anyone guessing wtf > > > > > > > from_tasklet is doing. > > > > > > > > > > > > > > I'd fix that up now before everything else goes in... > > > > > > > > > > > > As I mentioned in the other thread, I think this makes > > > > > > things > > > > > > much more readable. It's the same thing that the > > > > > > timer_struct > > > > > > conversion did (added a container_of wrapper) to avoid the > > > > > > ever-repeating use of typeof(), long lines, etc. > > > > > > > > > > But then it should use a generic name, instead of each sub- > > > > > system > > > > > using some random name that makes people look up exactly what > > > > > it > > > > > does. I'm not huge fan of the container_of() redundancy, but > > > > > adding private variants of this doesn't seem like the best > > > > > way > > > > > forward. Let's have a generic helper that does this, and use > > > > > it > > > > > everywhere. > > > > > > > > I'm open to suggestions, but as things stand, these kinds of > > > > treewide > > > > > > On naming? Implementation is just as it stands, from_tasklet() is > > > totally generic which is why I objected to it. from_member()? Not > > > great with naming... But I can see this going further and then > > > we'll > > > suddenly have tons of these. It's not good for readability. > > > > Since both threads seem to have petered out, let me suggest in > > kernel.h: > > > > #define cast_out(ptr, container, member) \ > > container_of(ptr, typeof(*container), member) > > > > It does what you want, the argument order is the same as > > container_of with the only difference being you name the containing > > structure instead of having to specify its type. > > I like this! Shall I send this to Linus to see if this can land in > -rc2 for use going forward? Sure ... he's probably been lurking on this thread anyway ... it's about time he got off his arse^Wthe fence and made an executive decision ... James _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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=-5.0 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_2 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 B20C7C433DF for ; Tue, 18 Aug 2020 21:00:49 +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 82541205CB for ; Tue, 18 Aug 2020 21:00:49 +0000 (UTC) Authentication-Results: mail.kernel.org; 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Tue, 18 Aug 2020 14:00:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hansenpartnership.com; s=20151216; t=1597784444; bh=tbsUcv475+YCZw1GTj2PQ6LvX4vSQZaYxn4zaS+R/4c=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=Qrj9DcFVwfv3LQ3ogFCLogZ3MFRIrVuZOGzCtGnuXEksHbYpCf4MOzhnjK48hnLeJ WBJIwZcuhQRmEISK3OYmfO8zwCeV5WGheC1BlogkcVwtiUSnVqiZDKUeoZ3ftkI0DB 8C1HptXhFOQveW6XttTml0y/WCVpA+LP1XIfDIQU= Received: from bedivere.hansenpartnership.com ([127.0.0.1]) by localhost (bedivere.hansenpartnership.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yxTvzG0VvDFx; Tue, 18 Aug 2020 14:00:43 -0700 (PDT) Received: from [153.66.254.174] (c-73-35-198-56.hsd1.wa.comcast.net [73.35.198.56]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by bedivere.hansenpartnership.com (Postfix) with ESMTPSA id 3908A8EE17F; Tue, 18 Aug 2020 14:00:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=hansenpartnership.com; s=20151216; t=1597784443; bh=tbsUcv475+YCZw1GTj2PQ6LvX4vSQZaYxn4zaS+R/4c=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=D+8/Cr58B/oiGrsp2scAFTKzPpwuRrxI0nzk9/FGC1mH6aV1pe7T9eKYXHzydxf7e uxoPDcWpTJmWe7T3PSHxKLwqMdOy0OFGWtWHPKks90yqeWzrewWrtu8v+gZ22+Y9Xp 3BintrUiXfYlFbDYGCbt6iSJyrOyqS5V85WlObHk= Message-ID: <1597784438.3978.6.camel@HansenPartnership.com> Subject: Re: [PATCH] block: convert tasklets to use new tasklet_setup() API From: James Bottomley To: Kees Cook Date: Tue, 18 Aug 2020 14:00:38 -0700 In-Reply-To: <202008181309.FD3940A2D5@keescook> References: <20200817091617.28119-1-allen.cryptic@gmail.com> <20200817091617.28119-2-allen.cryptic@gmail.com> <202008171228.29E6B3BB@keescook> <161b75f1-4e88-dcdf-42e8-b22504d7525c@kernel.dk> <202008171246.80287CDCA@keescook> <1597780833.3978.3.camel@HansenPartnership.com> <202008181309.FD3940A2D5@keescook> X-Mailer: Evolution 3.26.6 Mime-Version: 1.0 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: ulf.hansson@linaro.org, linux-atm-general@lists.sourceforge.net, manohar.vanga@gmail.com, airlied@linux.ie, Allen Pais , linux-hyperv@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, kys@microsoft.com, anton.ivanov@cambridgegreys.com, devel@driverdev.osuosl.org, linux-s390@vger.kernel.org, linux1394-devel@lists.sourceforge.net, maximlevitsky@gmail.com, richard@nod.at, deller@gmx.de, jassisinghbrar@gmail.com, 3chas3@gmail.com, intel-gfx@lists.freedesktop.org, kuba@kernel.org, mporter@kernel.crashing.org, jdike@addtoit.com, oakad@yahoo.com, s.hauer@pengutronix.de, linux-input@vger.kernel.org, linux-um@lists.infradead.org, linux-block@vger.kernel.org, broonie@kernel.org, openipmi-developer@lists.sourceforge.net, mitch@sfgoth.com, linux-arm-kernel@lists.infradead.org, Jens Axboe , linux-parisc@vger.kernel.org, netdev@vger.kernel.org, martyn@welchs.me.uk, dmitry.torokhov@gmail.com, linux-mmc@vger.kernel.org, sre@kernel.org, linux-spi@vger.kernel.org, alex.bou9@gmail.com, Allen Pais , stefanr@s5r6.in-berlin.de, linux-ntb@googlegroups.com, Romain Perier , shawnguo@kernel.org, davem@davemloft.net Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" On Tue, 2020-08-18 at 13:10 -0700, Kees Cook wrote: > On Tue, Aug 18, 2020 at 01:00:33PM -0700, James Bottomley wrote: > > On Mon, 2020-08-17 at 13:02 -0700, Jens Axboe wrote: > > > On 8/17/20 12:48 PM, Kees Cook wrote: > > > > On Mon, Aug 17, 2020 at 12:44:34PM -0700, Jens Axboe wrote: > > > > > On 8/17/20 12:29 PM, Kees Cook wrote: > > > > > > On Mon, Aug 17, 2020 at 06:56:47AM -0700, Jens Axboe wrote: > > > > > > > On 8/17/20 2:15 AM, Allen Pais wrote: > > > > > > > > From: Allen Pais > > > > > > > > > > > > > > > > In preparation for unconditionally passing the > > > > > > > > struct tasklet_struct pointer to all tasklet > > > > > > > > callbacks, switch to using the new tasklet_setup() > > > > > > > > and from_tasklet() to pass the tasklet pointer > > > > > > > > explicitly. > > > > > > > > > > > > > > Who came up with the idea to add a macro 'from_tasklet' > > > > > > > that > > > > > > > is just container_of? container_of in the code would be > > > > > > > _much_ more readable, and not leave anyone guessing wtf > > > > > > > from_tasklet is doing. > > > > > > > > > > > > > > I'd fix that up now before everything else goes in... > > > > > > > > > > > > As I mentioned in the other thread, I think this makes > > > > > > things > > > > > > much more readable. It's the same thing that the > > > > > > timer_struct > > > > > > conversion did (added a container_of wrapper) to avoid the > > > > > > ever-repeating use of typeof(), long lines, etc. > > > > > > > > > > But then it should use a generic name, instead of each sub- > > > > > system > > > > > using some random name that makes people look up exactly what > > > > > it > > > > > does. I'm not huge fan of the container_of() redundancy, but > > > > > adding private variants of this doesn't seem like the best > > > > > way > > > > > forward. Let's have a generic helper that does this, and use > > > > > it > > > > > everywhere. > > > > > > > > I'm open to suggestions, but as things stand, these kinds of > > > > treewide > > > > > > On naming? Implementation is just as it stands, from_tasklet() is > > > totally generic which is why I objected to it. from_member()? Not > > > great with naming... But I can see this going further and then > > > we'll > > > suddenly have tons of these. It's not good for readability. > > > > Since both threads seem to have petered out, let me suggest in > > kernel.h: > > > > #define cast_out(ptr, container, member) \ > > container_of(ptr, typeof(*container), member) > > > > It does what you want, the argument order is the same as > > container_of with the only difference being you name the containing > > structure instead of having to specify its type. > > I like this! Shall I send this to Linus to see if this can land in > -rc2 for use going forward? Sure ... he's probably been lurking on this thread anyway ... it's about time he got off his arse^Wthe fence and made an executive decision ... James _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel