Re: [PATCH] Platform code merge for 68000 core cpus

On Tue, Oct 23, 2012 at 2:52 AM, Luis Alves <[email protected]> wrote:
> --- a/arch/m68k/Kconfig.cpu
> +++ b/arch/m68k/Kconfig.cpu
> @@ -35,7 +35,7 @@ endchoice
>  if M68KCLASSIC
>
>  config M68000
> -       bool
> +       bool "MC68000"
>         select CPU_HAS_NO_BITFIELDS
>         select CPU_HAS_NO_MULDIV64
>         select CPU_HAS_NO_UNALIGNED

This needs a "depends on !MMU".
Else allmodconfig will select it, causing -m68000 to be passed to the assembler,
which may break the build depending on your version of binutils, a.o.

arch/m68k/kernel/entry.S:186: Error: invalid instruction for this
architecture; needs 68020 or higher (68020 [68k, 68ec020], 68030
[68ec030], 68040 [68ec040], 68060 [68ec060]) -- statement `bfextu
%sp@(50){#0,#4},%d0' ignored
arch/m68k/kernel/entry.S:211: Error: invalid operand mode for this
architecture; needs 68020 or higher -- statement `jbsr
@(sys_call_table,%d0:l:4)@(0)' ignored

Cfr. http://kisskb.ellerman.id.au/kisskb/buildresult/7416877/

BTW, it didn't break the build on my ancient workhorse binutils, but that's no
guarantee it would boot...

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected]

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