af_unix: remove unix_iter_state

As pointed out by Michael Tokarev , struct unix_iter_state is no longer
needed.
Suggested-by: NMichael Tokarev <mjt@tls.msk.ru>
Signed-off-by: NEric Dumazet <edumazet@google.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/unix/af_unix.c

@@ -2255,10 +2255,6 @@ static unsigned int unix_dgram_poll(struct file *file, struct socket *sock,
 #define get_offset(x) ((x) & ((1L << BUCKET_SPACE) - 1))
 #define set_bucket_offset(b, o) ((b) << BUCKET_SPACE | (o))
 
-struct unix_iter_state {
-	struct seq_net_private p;
-};
-
 static struct sock *unix_from_bucket(struct seq_file *seq, loff_t *pos)
 {
 	unsigned long offset = get_offset(*pos);
@@ -2383,7 +2379,7 @@ static const struct seq_operations unix_seq_ops = {
 static int unix_seq_open(struct inode *inode, struct file *file)
 {
 	return seq_open_net(inode, file, &unix_seq_ops,
-			    sizeof(struct unix_iter_state));
+			    sizeof(struct seq_net_private));
 }
 
 static const struct file_operations unix_seq_fops = {