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Geert Uytterhoeven 631d8b674f m68k/uaccess: Fix asm constraints for userspace access

When compiling a MMU kernel with CPU_HAS_ADDRESS_SPACES=n (e.g. "MMU=y
allnoconfig": "echo CONFIG_MMU=y > allno.config && make KCONFIG_ALLCONFIG=1
allnoconfig"), we use plain "move" instead of "moves", and I got:

  CC      arch/m68k/lib/uaccess.o
{standard input}: Assembler messages:
{standard input}:47: Error: operands mismatch -- statement `move.b %a0,(%a1)' ignored

This happens because plain "move" doesn't support byte transfers between
memory and address registers, while "moves" does.

Fix the asm constraints for __generic_copy_from_user(),
__generic_copy_to_user(), and __clear_user() to only use data registers
when accessing userspace.

Also, relax the asm constraints for 16-bit userspace accesses in
__put_user() and __get_user(), as both "move" and "moves" do support
such transfers between memory and address registers.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>

2013-06-24 19:44:19 +02:00

ashldi3.c

…

ashrdi3.c

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checksum.c

m68k: simpler m68k and ColdFire CPU's can use generic csum code

2011-12-24 21:47:57 +10:00

divsi3.S

m68k: merge m68k and m68knommu arch directories

2011-03-25 14:05:13 +10:00

lshrdi3.c