Re: [PATCH 06/14] peci: Add core infrastructure

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On Fri, Jul 16, 2021 at 02:50:04PM -0700, Dan Williams wrote:
> On Fri, Jul 16, 2021 at 2:08 PM Winiarska, Iwona
> > > > +}
> > > > +EXPORT_SYMBOL_NS_GPL(peci_controller_add, PECI);
> > >
> > > I think it's cleaner to declare symbol namespaces in the Makefile. In
> > > this case, add:
> > >
> > > cflags-y += -DDEFAULT_SYMBOL_NAMESPACE=PECI
> > >
> > > ...and just use EXPORT_SYMBOL_GPL as normal in the C file.
> > >
> >
> > I kind of prefer the more verbose EXPORT_SYMBOL_NS_GPL - it also
> > doesn't "hide" the fact that we're using namespaces (everything is in
> > the C file rather than mixed into Makefile), but it's not a strong
> > opinion, so sure - I can change this.
> >
> 
> Perhaps as a tie breaker, the maintainer you are submitting this to,
> Greg, uses the -DDEFAULT_SYMBOL_NAMESPACE scheme in his subsystem,
> drivers/usb/.

We did that because namespaces were added _after_ the kernel code was
already there.  For new code like this, the original use of
EXPORT_SYMBOL_NS_GPL() is best as it is explicit and obvious.  No need
to dig around in a Makefile to find out the namespace name.

thanks,

greg k-h



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