Re: [PATCH 2/2] tracing: Add CONFIG_TRACE_PRINTK_DEBUGGING to clean up kernel.h

[Steven Rostedt]

On Sun, 21 Jun 2026 05:34:32 -0400
Steven Rostedt <rostedt@xxxxxxxxxx> wrote:

> Instead of having trace_printk.h included in kernel.h, create a config
> TRACE_PRINTK_DEBUGGING that when set will update the CFLAGS in the
> Makefile to allow developers to add trace_printk() without the need to add
> the include for it. Having it included in the Makefile keeps it from being
> in the dependency chain and it will not waste extra CPU cycles for those
> building the kernel without using trace_printk.

Bah, I only tested with the config option enabled, and missed some
dependencies with it disabled.

For instance, rcu.h also uses ftrace_dump() so that too needs to go
into kernel.h. I also need to add a few more includes to trace_printk.h.

OK, I need to run this through all my tests to find where else I missed
adding the includes. But the idea should hopefully satisfy everyone.

-- Steve