Re: [PATCH printk v2 08/26] printk: nbcon: Implement processing in port->lock wrapper

[John Ogness]

On 2024-03-11, John Ogness <john.ogness@xxxxxxxxxxxxx> wrote:
> And I think you identified a bug relating to the setup() callback.

Actually this bug was recently fixed by Peter Collingbourne:

https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/kernel/printk/printk.c?h=next-20240313&id=801410b26a0e8b8a16f7915b2b55c9528b69ca87

One nice thing that has risen from this is we are starting to see
exactly what the console lock is needed for. At this point I would say
its main function is synchronizing boot consoles with real
drivers. Which means we will not be able to remove the console lock
until we find a real solution to match boot consoles (which circumvent
the Linux driver model) with the real drivers.

John