linux-kernel - Re: [PATCH v2 00/23] counter: cleanups and device lifetime fixes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <c8f6446e-748b-5845-ae60-5d6b8f3e8d39@metafoo.de>
Date:   Mon, 27 Dec 2021 13:25:25 +0100
From:   Lars-Peter Clausen <lars@...afoo.de>
To:     Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
        William Breathitt Gray <vilhelm.gray@...il.com>
Cc:     kernel@...gutronix.de,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>,
        linux-iio@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org,
        Patrick Havelange <patrick.havelange@...ensium.com>,
        Kamel Bouhara <kamel.bouhara@...tlin.com>,
        linux-arm-kernel@...ts.infradead.org,
        Syed Nayyar Waris <syednwaris@...il.com>,
        Oleksij Rempel <linux@...pel-privat.de>,
        Jarkko Nikula <jarkko.nikula@...ux.intel.com>,
        David Lechner <david@...hnology.com>,
        Fabrice Gasnier <fabrice.gasnier@...s.st.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        linux-stm32@...md-mailman.stormreply.com,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
        Ahmad Fatoum <a.fatoum@...gutronix.de>,
        "Felipe Balbi (Intel)" <balbi@...nel.org>,
        Raymond Tan <raymond.tan@...el.com>,
        Benjamin Gaignard <benjamin.gaignard@...com>
Subject: Re: [PATCH v2 00/23] counter: cleanups and device lifetime fixes

On 12/27/21 10:45 AM, Uwe Kleine-König wrote:
> [...]
>
>   - I wonder why counter is a bus and not a class device type. There is
>     no driver that would ever bind a counter device, is there? So
>     /sys/bus/counter/driver is always empty.
>
There used to be a time when GKH said that we do not want new driver 
classes. And all new subsystems should use bus since bus is a superset 
of class. This restriction has been eased since then.

But it was around when the IIO subsystem was merged and since the 
counter subsystem originated from the IIO subsystem I assume it just 
copied this.