[PATCH v2 2/3] MIPS: cm/cpc: export some missing symbols to be able to use them from driver code

[Sergio Paracuellos]

On Thu, Oct 28, 2021 at 11:34 AM Sergio Paracuellos
<sergio.paracuellos at gmail.com> wrote:
>
> Hi Thomas,
>
> On Thu, Oct 28, 2021 at 11:24 AM Thomas Bogendoerfer
> <tsbogend at alpha.franken.de> wrote:
> >
> > On Thu, Oct 28, 2021 at 06:11:18AM +0200, Sergio Paracuellos wrote:
> > > On Thu, Oct 28, 2021 at 6:05 AM Yanteng Si <siyanteng01 at gmail.com> wrote:
> > > >
> > > > Since commit 2bdd5238e756 ("PCI: mt7621: Add MediaTek MT7621 PCIe host controller driver")
> > > > the MT7621 PCIe host controller driver is built as a module but modpost complains once these
> > > > drivers become modules.
> > > >
> > > > ERROR: modpost: "mips_cm_unlock_other" [drivers/pci/controller/pcie-mt7621.ko] undefined!
> > > > ERROR: modpost: "mips_cpc_base" [drivers/pci/controller/pcie-mt7621.ko] undefined!
> > > > ERROR: modpost: "mips_cm_lock_other" [drivers/pci/controller/pcie-mt7621.ko] undefined!
> > > > ERROR: modpost: "mips_cm_is64" [drivers/pci/controller/pcie-mt7621.ko] undefined!
> > > > ERROR: modpost: "mips_gcr_base" [drivers/pci/controller/pcie-mt7621.ko] undefined!
> > > >
> > > > Let's just export them.
> > > >
> > > > Signed-off-by: Yanteng Si <siyanteng at loongson.cn>
> > > > ---
> > > >  arch/mips/kernel/mips-cm.c  | 5 +++++
> > > >  arch/mips/kernel/mips-cpc.c | 1 +
> > > >  2 files changed, 6 insertions(+)
> > > >
> > >
> > > Reviewed-by: Sergio Paracuellos <sergio.paracuellos at gmail.com>
> >
> > could we instead make the pcie-mt761 driver non modular ? Exporting
> > all MIPS specific stuff for just making an essential driver modular
> > doesn't IMHO make much sense.
>
> The driver is modular because I have been advised other times that new
> drivers should be able to be compiled as modules and we should avoid
> using 'bool' in Kconfig for new drivers. That's the only reason. I am
> also always including as 'y' the driver since for me not having pci in
> my boards has no sense... I am ok in changing Kconfig to be 'bool'
> instead of 'tristate', but I don't know what should be the correct
> thing to do in this case. Thoughts?

I guess we also want the driver to at least be compile tested in
'allmodconfig' and other similars...

>
> Best regards,
>     Sergio Paracuellos
>
> >
> > Thomas.
> >
> > --
> > Crap can work. Given enough thrust pigs will fly, but it's not necessarily a
> > good idea.                                                [ RFC1925, 2.3 ]