m68knommu: disable MC68000 cpu target when MMU is selected

As pointed out by Geert, MC68000 target needs to be disabled when
MMU support is enabled.

From Geert:

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/

Signed-off-by: Luis Alves <ljalvs@gmail.com>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>

diff --git a/arch/m68k/Kconfig.cpu b/arch/m68k/Kconfig.cpu
index aad3b0bad7dea9872ba350dff598ed1d662040cd..6708fa48e89586e7798471a7385e875e995b8327 100644 (file)
--- a/arch/m68k/Kconfig.cpu
+++ b/arch/m68k/Kconfig.cpu
@@ -36,6 +36,7 @@ if M68KCLASSIC
 
 config M68000
        bool "MC68000"
+       depends on !MMU
        select CPU_HAS_NO_BITFIELDS
        select CPU_HAS_NO_MULDIV64
        select CPU_HAS_NO_UNALIGNED