Re: [PATCH v4 7/7] kernel.h: drop trace_printk.h

[Steven Rostedt]

On Sun, 4 Jan 2026 02:20:55 +0200
Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:

> > 
> > I do not think it is necessary to move it.  
> 
> I'm not talking about move, I'm talking about the C 101 thingy. Any custom API
> should be included before use, otherwise compiler won't see it. Which header do
> you want to include to have this API being provided? Note, it's really bad
> situation right now with the header to be included implicitly via non-obvious
> or obscure path. The discussion moved as far as I see it towards the finding a
> good place for the trace_printk.h.

It's not a normal API. It's for debugging the kernel. Thus it should be
available everywhere without having to add a header. Hence, the best place
to include trace_printk.h, is in kernel.h.

I'm thinking that my proposed config option is the best solution now. For
those that do not care about debugging the kernel, you enable the
"HIDE_TRACE_PRINTK" config so that your builds will be "quicker". But for
everyone else, it will not slow down their workflow when they need to debug
code.

-- Steve