[PATCH 1/2] powerpc: drop dependency on <asm/machdep.h> in archrandom.h
Andy Shevchenko
andy.shevchenko at gmail.com
Tue Jul 26 16:13:37 AEST 2022
On Tue, Jul 26, 2022 at 1:35 AM Yury Norov <yury.norov at gmail.com> wrote:
> On Mon, Jul 25, 2022 at 11:39:39PM +0200, Andy Shevchenko wrote:
> > On Mon, Jul 25, 2022 at 6:19 PM Yury Norov <yury.norov at gmail.com> wrote:
> > > On Mon, Jul 25, 2022 at 09:28:12AM +0200, Andy Shevchenko wrote:
> > > > On Sun, Jul 24, 2022 at 12:19 AM Yury Norov <yury.norov at gmail.com> wrote:
...
> > > > > EXPORT_SYMBOL_GPL(pm_power_off);
> > > >
> > > > ^^^ (Note this and read below)
> > > >
> > > > ...
> > > >
> > > > > +EXPORT_SYMBOL(arch_get_random_seed_long);
> > > >
> > > > It can't be like this. Brief browsing of the callees shows that.
> > >
> > > Is my understanding correct that you're suggesting to make it GPL?
> > >
> > > ppc_md is exported with EXPORT_SYMBOL(), and the function is in header,
> > > so it's available for non-GPL code now. I don't want to change it.
> >
> > The symbols your function calls are GPL. As far as I understand (not a
> > lawyer!) it logically one may not call GPL and pretend to be non-GPL.
>
> Can you explain what you mean in details?
>
> The function is:
> static inline bool __must_check arch_get_random_seed_long(unsigned long *v)
> {
> if (ppc_md.get_random_seed)
> return ppc_md.get_random_seed(v);
>
> return false;
> }
>
> ppc_md is non-GPL:
> 77 /* The main machine-dep calls structure
> 78 */
> 79 struct machdep_calls ppc_md;
> 80 EXPORT_SYMBOL(ppc_md);
What a mess...
> And get_random_seed is initialized in in arch/powerpc/platforms/powernv/rng.c
> with different functions that are static and not exported at all.
>
> I don't understand where arch_get_random_seed_long calls GPL...
The ->get_random_seed() (aka "callees" in my previous mail) are all
GPL (maybe I missed one out of five which is non-GPL, but then it's
even more of a mess).
--
With Best Regards,
Andy Shevchenko
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