Re: [PATCH v5 5/5] kdb: Adapt kdb_msg_write to work with NBCON consoles

[John Ogness]

On 2025-09-30, Marcos Paulo de Souza <mpdesouza@xxxxxxxx> wrote:
> Function kdb_msg_write was calling con->write for any found console,
> but it won't work on NBCON consoles. In this case we should acquire the
> ownership of the console using NBCON_PRIO_EMERGENCY, since printing
> kdb messages should only be interrupted by a panic.
>
> At this point, the console is required to use the atomic callback. The
> console is skipped if the write_atomic callback is not set or if the
> context could not be acquired. The validation of NBCON is done by the
> console_is_usable helper. The context is released right after
> write_atomic finishes.
>
> The oops_in_progress handling is only needed in the legacy consoles,
> so it was moved around the con->write callback.
>
> Suggested-by: Petr Mladek <pmladek@xxxxxxxx>
> Reviewed-by: Petr Mladek <pmladek@xxxxxxxx>
> Signed-off-by: Marcos Paulo de Souza <mpdesouza@xxxxxxxx>

Reviewed-by: John Ogness <john.ogness@xxxxxxxxxxxxx>