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

On Sun, 21 Jun 2026 05:34:32 -0400
Steven Rostedt [off-list ref] 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