ac6_iter_state
#define ac6_seq_private(seq) ((struct ac6_iter_state *)(seq)->private)
struct ac6_iter_state *state = ac6_seq_private(seq);
struct ac6_iter_state *state = ac6_seq_private(seq);
struct ac6_iter_state *state = ac6_seq_private(seq);
sizeof(struct ac6_iter_state)))