pf_alloc_state_key
if ((skw = pf_alloc_state_key(pool_flags)) == NULL)
if ((sks = pf_alloc_state_key(pool_flags)) == NULL)
if ((*skp = pf_alloc_state_key(M_NOWAIT | M_ZERO)) == NULL)
if ((*nkp = pf_alloc_state_key(M_NOWAIT | M_ZERO)) == NULL)
struct pf_state_key *pf_alloc_state_key(int);