From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail.zeus03.de (zeus03.de [194.117.254.33]) (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 27077286A4 for ; Thu, 11 Dec 2025 03:47:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=194.117.254.33 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765424854; cv=none; b=JnW2k4m6KuLpLuKlZwH+Pwaoh0vDvNmGRuJDDs9ty0PKfV7e6yBDRnIopB26XANQkuhth2Y0ARX28Kk5VYbDuXhCe1lPLnBlWIOq3lNilnAV/rRP7bLR9IU4lf2SE2TA9tg5jQXQar0Lsj1fLFekC/gJEUqU1FTTPJDF1qhQV50= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765424854; c=relaxed/simple; bh=/a7+eP5QJ7LUqX+guLEai83prspNSYNSevmmGsCHHsw=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=vB9+aq2SpMfxHMn/GcbtJ8lUv74ofL5upMyLLEzwOvOJfEFTEI8z4b0JH8gl376WAsOovqlStwMn/UgAf6Tr0zgXdEXsXbbFr/mpMdoBeYBsntLpypirIeX+lPTlm9WXZixf+nJKIT/H2+d/2y4A0l9uK63k15K5AXtRq6Gki/I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com; spf=pass smtp.mailfrom=sang-engineering.com; dkim=pass (2048-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b=ZJ+z8Zsn; arc=none smtp.client-ip=194.117.254.33 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=sang-engineering.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=sang-engineering.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=sang-engineering.com header.i=@sang-engineering.com header.b="ZJ+z8Zsn" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= sang-engineering.com; h=date:from:to:cc:subject:message-id :references:mime-version:content-type:in-reply-to; s=k1; bh=/a7+ eP5QJ7LUqX+guLEai83prspNSYNSevmmGsCHHsw=; b=ZJ+z8ZsnvDQ3aiFLCj+r hkxLAo1kTBq/jD5S0CqhU4XE5l/7uZrgCEdpHwBjmOOPnSgmvzzzkRzEyKqfiEq+ rAJNnApDSa0MUPn6Iod4M32B7z7FQsx2BvMLvUj1fcfzDtRg/og2N/x99riH/sis e0J8TMpgKziYVHI7dz60I5Exqm3Jxf6Fh7hD0MDGPFL8nI5ezsRT4RdPmrvNcjGn Lxn+u56vTMhPZknC/HxE35Jer0Oe2qEwcNYn8qGLeHGj4IJ3U9jyFySsZ8GYQLer QljLgSh+K54DFZsKh/32QRWRJFCq16Uwx2TfE5115bXctS+TbqdTygxSBMN8DlzJ gA== Received: (qmail 3606451 invoked from network); 11 Dec 2025 04:47:21 +0100 Received: by mail.zeus03.de with UTF8SMTPSA (TLS_AES_256_GCM_SHA384 encrypted, authenticated); 11 Dec 2025 04:47:21 +0100 X-UD-Smtp-Session: l3s3148p1@rt5iAKVFQPOZ9ob4 Date: Thu, 11 Dec 2025 12:47:16 +0900 From: Wolfram Sang To: Laurent Pinchart Cc: Greg Kroah-Hartman , Jason Gunthorpe , Tzung-Bi Shih , Benson Leung , "Rafael J . Wysocki" , Danilo Krummrich , Jonathan Corbet , Shuah Khan , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, chrome-platform@lists.linux.dev, linux-kselftest@vger.kernel.org, Bartosz Golaszewski , Simona Vetter , Dan Williams Subject: Re: [PATCH v5 5/7] revocable: Add fops replacement Message-ID: References: <20251017162116.GA316284@nvidia.com> <20251020115734.GH316284@nvidia.com> <20251021121536.GG316284@nvidia.com> <20251023145131.GI262900@nvidia.com> <2025102321-struggle-fraying-52ff@gregkh> <20251211032306.GO28860@pendragon.ideasonboard.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="qu/5HOC0rx38U1af" Content-Disposition: inline In-Reply-To: <20251211032306.GO28860@pendragon.ideasonboard.com> --qu/5HOC0rx38U1af Content-Type: text/plain; charset=us-ascii Content-Disposition: inline > Replying late to this thread, I don't think this is right for V4L2. When > it comes to solving the .remove() vs. userspace race, I think the right > solution is at the cdev level. Isn't there even prototype code from Dan Williams? "[PATCH 1/3] cdev: Finish the cdev api with queued mode support" https://lkml.org/lkml/2021/1/20/997 --qu/5HOC0rx38U1af Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEOZGx6rniZ1Gk92RdFA3kzBSgKbYFAmk6PsEACgkQFA3kzBSg KbYRgg/+Kg4KkHrfEBuIlPY4Tmc9Wy75VBemIFjPdsEl7CVRMYqL7b4pU4bTlrin Vip0ZRX+4/lzhCDOld2mMgSe8GjEWS1Cfqvzl+WPWgShiH8ta+ySMLmqt+il6N6x y/vyAocRnW8z1DvxKyFiQO4gM+D+UP2EKpRTXnw63D+CyMcARZKJaX+Kw5RH8NBr qs+H/GhcYev9uSmTRFS2ARuO7g2vNdm+eqRyTmvzVSIdNUYlHeMKmfpV3DylGecH cZwEN+uhVQ6MEK3a7O+Rw1wx/uFFz56iZwVaNNisjrlJkfrQWZhClJVthRmRVHVx VIgPmQ8sABpSXl7bpeGmwxzJ++Nb6jP9iZm2ISvw6EtMfo3khGaMZheEpKxmR52D 88o/1N2Ok5+e0CLo6wGCMTy1EJsJL55evezUkin+ECGBBwwdXnyUrVophjgg9Ta6 dKkdUKokkT29u8lAe+Y2is9MVDRmqEDcoDzkymDJdNtREMLj2HzPZbqeWMiivPnc yo6ZK7QeU/YFYK4hwqnmfPx0YHWj8UqviTlc3vUFTfKjmgaeBA8Q2/eY+1TVzTrZ lHOTUJasafEh+dcx65+CEd/s1Xrx+gQYf1EQ4VDOGu8bXfwYBzlD4roPQ3ZT6K6Y nwG7vvT6NUABpHLRC3eL979YBwfQWK2Bcf45VNNwLZ3o1rF2NUk= =webN -----END PGP SIGNATURE----- --qu/5HOC0rx38U1af--