OP_MODE_MASK
tmp &= ~OP_MODE_MASK;
tmp &= ~OP_MODE_MASK;
val = val & OP_MODE_MASK;
if (opmode & ~OP_MODE_MASK)
val &= ~(OP_MODE_MASK << shiftbit);
return put_user(opmode & OP_MODE_MASK, u_opmode);