From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C46E12DF13C; Mon, 1 Sep 2025 16:54:27 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756745669; cv=none; b=Mc7Lva5iJbsT0+PgDhtz2dKvj0pLroU4tvC14Oh7CrLvgqVlHn/HDldLiA5PmnN+efU/L3bdnag2+Y4vkeQDCZ3QzSPRyJ44JKeWoUxvjzgvwGTaOmBVekrKVCSw2swBawdzn4jOyZDGJd0k/N9JcWXWcnSk0oODrDObRs01yVg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756745669; c=relaxed/simple; bh=or+QEmvqQthxP5KlB7QuHcOFpktvyMnamOGevaOE/Mc=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=I28hWJmkFk5iepk6g5/T34RcrIxeSuJ2cIDLkT8fMfwlIyWASu75Qdffl068VB6JCX69SAVtGNFFgJ4e1vsE5g+9tj/y3PrnT6sc+kaXieSQXyVWo48oKyBOVJOuvp7KOAtSLYqNq5CZ35xwqiJb71uXY42O6SSbkKpM+IYMkwk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=C6foWfSR; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="C6foWfSR" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Sender:Reply-To:Content-ID:Content-Description; bh=ilow6EIc5y22pIG9yaRN/E/TA3c+bEpyyK/DUWu+DLk=; b=C6foWfSRR0vcQWldgezvYK13dt mIkKkVVPIW2K423ZF02lazMoUpTIKUbhAph/0SGAsuwCZHzDtQIKL6Jr3h0y0FMxncabtZmjc0WkK W1c9G1sy8h8rz3blQcodRvvPwDPG1QRvi/UQRHvnE69FFVEMmf8dWFAEgxMxAyWOaqVVcKgfKpX5t bhMuGhSiv+1oaZYp2GkqfCWw0FXwrEXYZsTRo7aiSS4X0aG2aFVmivER0hCWnLbFYKcQIOe5pGs84 bKHgTOPd9t4GTgKKs093Dj+PDUoigByA3vEMVQ9hJCwj5P0LL+PvadP1WeQ47no6+wQojkcDPgjEl jXS0z6eA==; Received: from [50.53.25.54] (helo=[192.168.254.17]) by bombadil.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1ut7nW-0000000DMYs-1Hqd; Mon, 01 Sep 2025 16:54:26 +0000 Message-ID: <4c75e5b0-48fe-4778-8ec5-d8d43009ddd4@infradead.org> Date: Mon, 1 Sep 2025 09:54:25 -0700 Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] kconfig: Add transitional symbol attribute for migration support To: Kees Cook Cc: Nathan Chancellor , Nicolas Schier , Jonathan Corbet , Masahiro Yamada , Arnd Bergmann , Krzysztof Kozlowski , linux-kbuild@vger.kernel.org, linux-doc@vger.kernel.org, Miguel Ojeda , Stephen Brennan , Marco Bonelli , Petr Vorel , linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org References: <20250830020109.it.598-kees@kernel.org> <202509010944.CAAFB2ED22@keescook> Content-Language: en-US From: Randy Dunlap In-Reply-To: <202509010944.CAAFB2ED22@keescook> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 9/1/25 9:45 AM, Kees Cook wrote: > On Mon, Sep 01, 2025 at 09:39:46AM -0700, Randy Dunlap wrote: >> Are you (implicitly?) saying that all previous attempts at transitional >> kconfig symbols have failed? If so, I just wasn't aware of that. > > I haven't found any way to do a "proper" CONFIG transition. I looked > through past transitions and they all left stuff visible. Is there a way > to actually do this with existing kconfig? > I don't know. I haven't looked as hard at it as you have. I just didn't realize that there had been significant failures that required kconfig code changes. I'm just trying to understand. Carry on. -- ~Randy