#ifdef PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
#define OVS_ADAPTIVE_MUTEX_INITIALIZER \
- { PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP, NULL }
+ { PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP, "<unlocked>" }
#else
#define OVS_ADAPTIVE_MUTEX_INITIALIZER OVS_MUTEX_INITIALIZER
#endif