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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1159FC43334 for ; Mon, 20 Jun 2022 21:02:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242361AbiFTVC6 (ORCPT ); Mon, 20 Jun 2022 17:02:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54058 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234470AbiFTVC6 (ORCPT ); Mon, 20 Jun 2022 17:02:58 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ABF7762D0; Mon, 20 Jun 2022 14:02:56 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 3A9E461151; Mon, 20 Jun 2022 21:02:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6A819C3411B; Mon, 20 Jun 2022 21:02:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1655758975; bh=YXHELCkM/DaDMHJEhftBobWPAAsBACKzdTfooNhF3xo=; h=Date:From:To:Cc:Subject:Reply-To:References:In-Reply-To:From; b=AihOai6z5WodejxapxdG/Gh+CAzGZfabSqHcZQbPnNr15qoCfvqUIevadlSPZhn4C LGRoL6AGtPrpTv6DZHgkqQ1Lvg9gkjqKgZiJKFwUG/F82ovq63Dw4Gwz6pM9lKnOZA nhna/6d/hg9dCqr3A6hgiXuB7+tFKmWZvIR6+ygHnj5v2EASXrYlGhlRzmUxs9VbvL dkYUBlIei7DT7N37TRfXmll8F2mTvM2TeJKSloxY29tq9G90V5+mQO/AcyJFeelfez b6fti4fjC4LzmOhVQdP3rQSuihxlDcW5nBR7QSfc3NAosS1OVKcltF925X3ehTBbUQ akAHSbtZY0Htw== Received: by paulmck-ThinkPad-P17-Gen-1.home (Postfix, from userid 1000) id 00D025C0564; Mon, 20 Jun 2022 14:02:54 -0700 (PDT) Date: Mon, 20 Jun 2022 14:02:54 -0700 From: "Paul E. McKenney" To: Catalin Marinas Cc: Marco Elver , Kefeng Wang , will@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, mark.rutland@arm.com, Jonathan Corbet , linux-doc@vger.kernel.org, arnd@arndb.de, Peter Zijlstra Subject: Re: [PATCH v4 1/2] asm-generic: Add memory barrier dma_mb() Message-ID: <20220620210254.GY1790663@paulmck-ThinkPad-P17-Gen-1> Reply-To: paulmck@kernel.org References: <20220523113126.171714-1-wangkefeng.wang@huawei.com> <20220523113126.171714-2-wangkefeng.wang@huawei.com> <20220616231350.GA1790663@paulmck-ThinkPad-P17-Gen-1> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org On Sun, Jun 19, 2022 at 10:45:22AM +0100, Catalin Marinas wrote: > On Fri, Jun 17, 2022 at 12:18:41PM +0200, Marco Elver wrote: > > On Fri, 17 Jun 2022 at 01:13, Paul E. McKenney wrote: > > > On Mon, May 23, 2022 at 01:35:27PM +0200, Marco Elver wrote: > > > > On Mon, 23 May 2022 at 13:21, Kefeng Wang wrote: > > > > > > > > > > The memory barrier dma_mb() is introduced by commit a76a37777f2c > > > > > ("iommu/arm-smmu-v3: Ensure queue is read after updating prod pointer"), > > > > > which is used to ensure that prior (both reads and writes) accesses > > > > > to memory by a CPU are ordered w.r.t. a subsequent MMIO write. > > > > > > > > > > Reviewed-by: Arnd Bergmann # for asm-generic > > > > > Signed-off-by: Kefeng Wang > > > > > > > > Reviewed-by: Marco Elver > > > > > > Just checking... Did these ever get picked up? It was suggested > > > that they go up via the arm64 tree, if I remember correctly. > > > > I don't see them in -next, and as far as I can tell, they're not in > > the arm64 tree. > > Since v4 was posted during the merging window, it hasn't been queued for > 5.19-rc1. I normally only merge patches with a Fixes tag during the -rc > period (though there are some exceptions). Mark commented in v1 that > such tag isn't necessary, so I thought I'd leave it for the 5.20 merging > window. > > That said, the diffstat is small, so if it helps having this in 5.19, I > can queue it for -rc4. As long as it is not going to be lost, I am good. ;-) So v5.20 is fine. Thanx, Paul