FPTOMQ
mq = FPTOMQ(fp);
notifier_remove(p, FPTOMQ(fp), i);
struct mqueue *mq = FPTOMQ(fp);
mq = FPTOMQ(fp);
struct mqueue *mq = FPTOMQ(fp);
struct mqueue *mq = FPTOMQ(kn->kn_fp);
struct mqueue *mq = FPTOMQ(kn->kn_fp);
struct mqueue *mq = FPTOMQ(kn->kn_fp);