On Sun, Jul 25, 2021 at 12:46 PM Geert Uytterhoeven
<geert@xxxxxxxxxxxxxx> wrote:
Depending on register assignment by the compiler:
{standard input}:3084: Error: operands mismatch -- statement `andl %a1,%d1' ignored
{standard input}:3145: Error: operands mismatch -- statement `orl %a1,%d1' ignored
{standard input}:3195: Error: operands mismatch -- statement `eorl %a1,%d1' ignored
Indeed, the first operand must not be an address register. Fix this by
adjusting the register constraint from "g" (general purpose register) to
"d" (data register).
Fixes: e39d88ea3ce4a471 ("locking/atomic, arch/m68k: Implement atomic_fetch_{add,sub,and,or,xor}()")
Fixes: d839bae4269aea46 ("locking,arch,m68k: Fold atomic_ops")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Arnd Bergmann <arnd@xxxxxxxx>
Reported-by: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
---
Personally, I have never seen this failure in an 68020+ build, but I can
reproduce it on Coldfire with the config provided by lkp (with bogus
CONFIG_RMW_INSNS=y).
This fixed the problem for me in the 68020 build with all compiler versions.
Tested-by: Arnd Bergmann <arnd@xxxxxxxx>
