Man page 9 : kthread_freezable_should_stop

kthread_freezable_should_stop - should this freezable kthread return now?

bool kthread_freezable_should_stop(bool *  was_frozen );

was_frozen
    optional out parameter, indicates whether current was frozen

kthread_should_stop for freezable kthreads, which will enter refrigerator if necessary. This function is safe from kthread_stop / freezer deadlock and freezable kthreads should use this function instead of calling try_to_freeze directly.