GPIOD_FLAG_EXPORT
test_bit(GPIOD_FLAG_EXPORT, &dflags) ||
if (test_and_set_bit(GPIOD_FLAG_EXPORT, &desc->flags))
clear_bit(GPIOD_FLAG_EXPORT, &desc->flags);
if (!test_bit(GPIOD_FLAG_EXPORT, &desc->flags))
clear_bit(GPIOD_FLAG_EXPORT, &desc->flags);