PWMF_EXPORTED
if (test_and_set_bit(PWMF_EXPORTED, &pwm->flags))
clear_bit(PWMF_EXPORTED, &pwm->flags);
clear_bit(PWMF_EXPORTED, &pwm->flags);
if (!test_and_clear_bit(PWMF_EXPORTED, &pwm->flags))
if (!test_bit(PWMF_EXPORTED, &pwm->flags))
if (test_bit(PWMF_EXPORTED, &pwm->flags))