Re: [PATCH v5] printk: Userspace format enumeration support

[Chris Down]

Joe Perches writes:
> On Fri, 2021-04-16 at 14:56 +0100, Chris Down wrote:
> > Any better suggestions? :-)
>
> A gcc plugin that looks for functions marked __printf(fmt, pos)
> so any const fmt is stored.

I fail to see any way in which that can solve the problem described, which is 
mobility of the level information, not the existence of the format itself.  
`__printf` doesn't communicate or imply any such information, since it's 
completely level agnostic.