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=-6.3 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 DEFFBC433E0 for ; Tue, 9 Feb 2021 10:55:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9EEC064E70 for ; Tue, 9 Feb 2021 10:55:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232161AbhBIKzK (ORCPT ); Tue, 9 Feb 2021 05:55:10 -0500 Received: from mail.kernel.org ([198.145.29.99]:42276 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231886AbhBIKv4 (ORCPT ); Tue, 9 Feb 2021 05:51:56 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id A4BC464E4B; Tue, 9 Feb 2021 10:39:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1612867197; bh=/jh06s5G/k5IVhUW0yt0cXHDhlQpDXNonOEqGQ0F5qg=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=NvMFBEAJSBSoBgfeE00P1l46u1S3zR8ZgC92VkrGXNBZQuRkiv3FBf5/BWa3AU0l2 +Bcp0x149qDPwTIkgv9CTtwbxFBMuydrVT7JTYBcT2SpShOevWsbynTFEld/q+rWL7 +RbWKxPN1+fsK/BNEFqHZj5ruw1wX0KC4xxywqXU= Date: Tue, 9 Feb 2021 11:39:54 +0100 From: Greg KH To: obayashi.yoshimasa@socionext.com Cc: sumit.garg@linaro.org, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, daniel.thompson@linaro.org Subject: Re: DMA direct mapping fix for 5.4 and earlier stable branches Message-ID: References: <27bbe35deacb4ca49f31307f4ed551b5@SOC-EX02V.e01.socionext.com> 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-kernel@vger.kernel.org On Tue, Feb 09, 2021 at 10:19:07AM +0000, obayashi.yoshimasa@socionext.com wrote: > > How do you judge "mature"? > > My basic criteria are > * Function is exist, but bug fix is necessary: "mature" > * Function extension is necessary: "immature" > > > And again, if a feature isn't present in a specific kernel version, why would you think that it would be > > a viable solution for you to use? > > So, "a feature isn't present in a specific kernel version", > also means "immature" according to my criteria. Great, please use the 5.10 or newer kernel release then. thanks, greg k-h