On Mon, Mar 10, 2014 at 7:59 PM, Arnd Bergmann arnd@arndb.de wrote:
arch/avr32/include/asm/io.h:#define IO_SPACE_LIMIT 0xffffffff arch/frv/include/asm/io.h:#define IO_SPACE_LIMIT 0xffffffff
They have no MMU, and the code relies on the port number to match both the virtual and the physical address. You could be right about these, but I would guess that the code also needs some other changes if we want to make it work on nommu kernels. It also depends on whether the I/O bus address is the same as the CPU address, or if it starts at bus address 0.
arch/m68k/include/asm/io_no.h:#define IO_SPACE_LIMIT 0xffffffff
This looks like a mistake, it should be smaller
io_no.h is for nommu.
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
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