lf_create_range
lf_create_range(brange, owner, type, 0, start, end);
lf_create_range(range, owner, type, flags, start, end);
lf_create_range(brange, owner, type, flags, start, end);
lf_create_range(last_match, first_match->lf_owner,
static void lf_create_range(struct lockf_range *, struct proc *, int, int,