From: John Ogness <john.ogness@linutronix.de>
To: Marcos Paulo de Souza <mpdesouza@suse.com>,
Petr Mladek <pmladek@suse.com>,
Steven Rostedt <rostedt@goodmis.org>,
Sergey Senozhatsky <senozhatsky@chromium.org>
Cc: linux-kernel@vger.kernel.org, marcos@mpdesouza.com,
Marcos Paulo de Souza <mpdesouza@suse.com>
Subject: Re: [PATCH v2] printk: nbcon: Check for device_{lock,unlock} callbacks
Date: Mon, 08 Dec 2025 15:56:08 +0106 [thread overview]
Message-ID: <878qfdvxi7.fsf@jogness.linutronix.de> (raw)
In-Reply-To: <20251208-nbcon-device-cb-fix-v2-1-36be8d195123@suse.com>
On 2025-12-08, Marcos Paulo de Souza <mpdesouza@suse.com> wrote:
> These callbacks are necessary to synchronize ->write_thread callback
> against other operations using the same device.
>
> Signed-off-by: Marcos Paulo de Souza <mpdesouza@suse.com>
> ---
> I found this issue while creating a custom kernel module that implements
> the nbcon interfaces.
> ---
> Changes in v2:
> - Merged the checks device locks with write_thread check, suggested by John.
> - Link to v1: https://patch.msgid.link/20251205-nbcon-device-cb-fix-v1-1-906bdff5760b@suse.com
> ---
Thanks!
Reviewed-by: John Ogness <john.ogness@linutronix.de>
next prev parent reply other threads:[~2025-12-08 14:50 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-08 14:06 [PATCH v2] printk: nbcon: Check for device_{lock,unlock} callbacks Marcos Paulo de Souza
2025-12-08 14:50 ` John Ogness [this message]
2025-12-15 15:09 ` Petr Mladek
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