Re: [PATCH v3 05/38] counter: add HAS_IOPORT dependencies

Niklas Schnelle
2023-04-28T13:28:23Z

On Tue, 2023-03-14 at 08:41 -0400, William Breathitt Gray wrote:
> On Tue, Mar 14, 2023 at 01:11:43PM +0100, Niklas Schnelle wrote:
> > In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
> > not being declared. We thus need to add HAS_IOPORT as dependency for
> > those drivers using them.
> >
> > Co-developed-by: Arnd Bergmann <arnd@kernel.org>
> > Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
> > ---
> > drivers/counter/Kconfig | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/counter/Kconfig b/drivers/counter/Kconfig
> > index b5ba8fb02cf7..1cae5097217e 100644
> > --- a/drivers/counter/Kconfig
> > +++ b/drivers/counter/Kconfig
> > @@ -15,6 +15,7 @@ if COUNTER
> > config 104_QUAD_8
> > tristate "ACCES 104-QUAD-8 driver"
> > depends on (PC104 && X86) || COMPILE_TEST
> > + depends on HAS_IOPORT
> > select ISA_BUS_API
> > help
> > Say yes here to build support for the ACCES 104-QUAD-8 quadrature
> > --
> > 2.37.2
>
> Is HAS_IOPORT needed because this driver uses devm_ioport_map()? The
> inb()/outb() functions and such are not used in this driver, so would it
> suffice to depend on HAS_IOPORT_MAP instead?
>
> William Breathitt Gray

Yes, good catch HAS_IOPORT_MAP indeed seems to be enough. Will be
changed in v4. Thankfully the Kconfig change to add HAS_IOPORT has
already landed in Linus' tree so for the future these per subsystem
patches can be merged independently.

Thanks,
Niklas