linux-kernel - Re: [PATCH 0/1] m68k: Handle HAS

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Message-ID: <dd55afa6-8cb6-4e25-b720-d2df62dbb5e6@gmail.com>
Date: Thu, 4 Apr 2024 07:11:41 +1300
From: Michael Schmitz <schmitzmic@...il.com>
To: Niklas Schnelle <schnelle@...ux.ibm.com>,
 Geert Uytterhoeven <geert@...ux-m68k.org>
Cc: linux-m68k@...ts.linux-m68k.org, Arnd Bergmann <arnd@...nel.org>,
 Heiko Carstens <hca@...ux.ibm.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/1] m68k: Handle HAS_IOPORT dependencies

Niklas,

how do you propose we handle legacy drivers that do depend on 
inb()/outb() functions (_not_ actual ISA I/O) on architectures that map 
inb()/outb() to MMIO functions?

(In my case, that's at least ne.c - Geert ought to have a better 
overview what else does use inb()/outb() on m68k)

Cheers,

     Michael

On 4/04/24 01:28, Niklas Schnelle wrote:
> Hi Geert,
>
> This is a follow up in my ongoing effort of making inb()/outb() and
> similar I/O port accessors compile-time optional. Previously I sent this
> as a treewide series titled "treewide: Remove I/O port accessors for
> HAS_IOPORT=n" with the latest being its 5th version[0]. With a significant
> subset of patches merged I've changed over to per-subsystem series. These
> series are stand alone and should be merged via the relevant tree such
> that with all subsystems complete we can follow this up with the final
> patch that will make the I/O port accessors compile-time optional.
>
> The current state of the full series with changes to the remaining
> subsystems and the aforementioned final patch can be found for your
> convenience on my git.kernel.org tree in the has_ioport_v6 branch[1] with
> signed tags. As for compile-time vs runtime see Linus' reply to my first
> attempt[2].
>
> Thanks,
> Niklas
>
> [0] https://lore.kernel.org/all/20230522105049.1467313-1-schnelle@linux.ibm.com/
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/niks/linux.git/log/?h=has_ioport_v6
> [2] https://lore.kernel.org/lkml/CAHk-=wg80je=K7madF4e7WrRNp37e3qh6y10Svhdc7O8SZ_-8g@mail.gmail.com/
>
> Niklas Schnelle (1):
>    m68k: Let GENERIC_IOMAP depend on HAS_IOPORT
>
>   arch/m68k/Kconfig | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>