locks [-col] [directly] inverted by func ...

Lists only those locks that may be inverted by calling one of the specified functions. (See "Lock Inversions".)

If the keyword directly is used, only those locks that are directly inverted by the specified functions (that is, the functions that actually release and reacquire locks using a threads library routine) are listed. If the keyword directly is not used, a lock that is held by one of the specified functions and inverted by some function called from it (and so on) is also listed. For example, in the following code f1 directly inverts m1, and indirectly inverts m2.

f1() { pthread_mutex_unlock(&m1); f2(); pthread_mutex_lock(&m1); }
f2() { f3(); }
f3() { pthread_mutex_unlock(&m2); pthread_mutex_lock(&m2); }