dyndbg: pr_fmt(fmt) with additional arguments?

[Philipp Hahn]

 Hello Jason, hello Jim,

I've been using the following in my modules to prefix all messages with
the module and function name:
	#define pr_fmt(fmt) KBUILD_MODNAME ".%s ", __func__

This worked nicely until `pr_debug_ratelimit()` is used: The additional
arguments breaks `DEFINE_DYNAMIC_DEBUG_METADATA_CLS`:

	#define pr_debug_ratelimited(fmt, ...)					\
		DEFINE_DYNAMIC_DEBUG_METADATA(…, pr_fmt(fmt));		\

	#define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt)		\
		DEFINE_DYNAMIC_DEBUG_METADATA_CLS(name, …, fmt)

	#define DEFINE_DYNAMIC_DEBUG_METADATA_CLS(name, cls, fmt)	\
		static struct _ddebug  __aligned(8)			\
		__section("__dyndbg") name = {				\
			… \
			.format = (fmt),				\

This could be fixed easily by adding an additional '...' to it to slurp
any additional argument which `pr_fmt` might add.

Would this be okay or do I miss something?

For testing I have recompiled current 7.0.0-rc1 for x86_64 with no
compile failures.

Philipp Hahn