I believe I just found the answer for point number 2:

THE REST
M: Linus Torvalds <torvalds@linux-foundation.org>
L: linux-kernel@vger.kernel.org
Q: http://patchwork.kernel.org/project/LKML/list/
T: git git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
S: Buried alive in reporters
F: *
F: */


On Sat, Oct 19, 2019 at 10:33 AM Paulo Almeida <paulo.miguel.almeida.rodenas@gmail.com> wrote:
Hi all,

I was reading the KernelJanitor/Todo webpage and found the printk-related task that had to be done.

I eventually came across this piece of code that led me to 2 questions that I couldn't answer myself https://github.com/torvalds/linux/blame/master/init/do_mounts.c#L434-L455

1 - This specific code block has been around for quite some time and many additions using the correct printk(KERN_* were made after it was written. Does that mean that this code block is an exception and should be left as-is for some technical reason? Or, people have somehow forgotten about it and I finally found something to do? :)

2 - I took a look at the https://www.kernel.org/doc/linux/MAINTAINERS list and their respective folders/repos and couldn't find out who would be the person who I should eventually send the patches to. Is there any "fallthrough" maintainer when there isn't one specified? (Please put me straight if I'm not seeing things from the right angle)

Best regards,

Paulo Almeida