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Date: Fri, 16 Jan 2026 17:41:47 +0100
Message-Id: <DFQ5W41X6Z7S.3V6FRPXYMDJ1F@kernel.org>
Subject: Re: [PATCH v7 1/3] revocable: Revocable resource management
Cc: "Bartosz Golaszewski" <brgl@kernel.org>, "Tzung-Bi Shih"
 <tzungbi@kernel.org>, "Benson Leung" <bleung@chromium.org>, "Greg
 Kroah-Hartman" <gregkh@linuxfoundation.org>, "Rafael J . Wysocki"
 <rafael@kernel.org>, "Linus Walleij" <linusw@kernel.org>, "Jonathan Corbet"
 <corbet@lwn.net>, "Shuah Khan" <shuah@kernel.org>,
 <linux-doc@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
 <chrome-platform@lists.linux.dev>, <linux-kselftest@vger.kernel.org>,
 "Wolfram Sang" <wsa+renesas@sang-engineering.com>, "Simona Vetter"
 <simona.vetter@ffwll.ch>, "Dan Williams" <dan.j.williams@intel.com>, "Jason
 Gunthorpe" <jgg@nvidia.com>, <linux-gpio@vger.kernel.org>
To: "Laurent Pinchart" <laurent.pinchart@ideasonboard.com>
From: "Danilo Krummrich" <dakr@kernel.org>
References: <20260116080235.350305-1-tzungbi@kernel.org>
 <20260116080235.350305-2-tzungbi@kernel.org>
 <DFQ45FWO4XHC.2BW7I9LGC76WT@kernel.org>
 <CAMRc=Medaqr5UPimc8o+VTy=9MgU5p8AXjArisQfBNqi7ktSGg@mail.gmail.com>
 <20260116160424.GA14499@pendragon.ideasonboard.com>
In-Reply-To: <20260116160424.GA14499@pendragon.ideasonboard.com>

On Fri Jan 16, 2026 at 5:04 PM CET, Laurent Pinchart wrote:
> Based on the discussions we had at LPC, the revocable resource management=
 API
> is not the right solution to handle races between device removal and user=
space
> access.

Please see: https://lore.kernel.org/all/DFQ5D44A0348.PZJIGPL972N@kernel.org=
/

> It is however a possibly useful tool for races between producers and cons=
umers
> *inside the kernel*.

Do you have an example for such a case?