ANON_LOCKSIZE
((uintptr_t)(amp) >> ANON_MAP_SHIFT)) & (ANON_LOCKSIZE - 1))
pad_mutex_t anon_array_lock[ANON_LOCKSIZE];
kcondvar_t anon_array_cv[ANON_LOCKSIZE];
for (i = 0; i < ANON_LOCKSIZE; i++) {