On Wed, 9 Jun 2021 14:14:17 +0200
Daniel Bristot de Oliveira [off-list ref] wrote:

On 6/4/21 11:28 PM, Steven Rostedt wrote:

quoted

quoted

+#ifdef CONFIG_X86_LOCAL_APIC  

I wonder if we should move this into a separate file, making the
__trace_irq_entry() a more name space safe name and have it call that.
I have a bit of a distaste for arch specific code in a generic file.
  

I am placing the intel specific file in:

arch/x86/kernel/trace_osnoise.c

I would make it just arch/x86/kernel/trace.c

so that it can hold all arch specific tracing information, and not need
to create a file for anything else we might need later.

and the kernel/trace/trace_osnoise.h looks like this:

#ifdef CONFIG_X86_LOCAL_APIC
int osnoise_arch_register(void);
int osnoise_arch_unregister(void);
#else /* CONFIG_X86_LOCAL_APIC */
#define osnoise_arch_register() do {} while (0)
#define osnoise_arch_unregister() do {} while (0)
#endif /* CONFIG_X86_LOCAL_APIC */

This can be used by other archs as well...

sound reasonable?

The proper way to d that is to use weak functions in the C code in the
generic file.

int __weak osnoise_arch_register(void)
{
	return 0;
}

int __weak osnoise_arch_unregister(void)
{
	return 0;
}

Hmm, does the unregister really need a return value?

-- Steve