[PATCH v4 3/3] media: atomisp: Only use trace_printk if allowed

David Laight David.Laight at ACULAB.COM
Fri Aug 21 12:18:28 UTC 2020


From: Nicolas Boichat
> Sent: 21 August 2020 13:07
...
> > You might also want a #define that can set temporarily
> > to enable traces in a specific file/module even though
> > CONFIG_TRACE=n.
> 
> I don't understand how traces are supposed to work with CONFIG_TRACE=n?

Probably because I meant something different :-)

You want the kernel built so that there are no (expanded)
calls to trace_printf() but with support for modules that
contain them.

Then I can load a module into a distro kernel that
contains trace_printf() calls for debug testing.

Which is why I was suggesting a config option that
only rand-config builds would ever set that would
cause the calls to generate compile-time errors.

	David

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