Hi Arnd,
On Wed, Apr 3, 2024 at 8:35 PM Arnd Bergmann <arnd@xxxxxxxxxx> wrote:
On Wed, Apr 3, 2024, at 20:11, Michael Schmitz wrote:
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)
If a machine provides an inb()/outb() set of operations that
is actually used, it should set HAS_IOPORT.
For the Q40, it may be better in the long run to change the
drivers to just use MMIO directly though.
Q40 uses ISA.
Michael is worried about non-ISA drivers using inb() and friends.
At some point in time (i.e. eons ago), we were told it was better to
use in[bwl]()/read[bwl]() instead of directly dereferencing volatile
pointers...
Anyway, I don't think we have many users of inb() and friends left, and
I assume the bots should have detected any/most remaining users in Niklas'
branch...
arch/m68k/include/asm/floppy.h on Sun-3x might be the only offender?
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
