net: rose: use seq_hlist_foo() helpers

Simplify seq_file code.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 8feb9e5..e90b9b6 100644 (file)
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -1404,29 +1404,13 @@ static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 static void *rose_info_start(struct seq_file *seq, loff_t *pos)
        __acquires(rose_list_lock)
 {
-       int i;
-       struct sock *s;
-       struct hlist_node *node;
-
        spin_lock_bh(&rose_list_lock);
-       if (*pos == 0)
-               return SEQ_START_TOKEN;
-
-       i = 1;
-       sk_for_each(s, node, &rose_list) {
-               if (i == *pos)
-                       return s;
-               ++i;
-       }
-       return NULL;
+       return seq_hlist_start_head(&rose_list, *pos);
 }
 
 static void *rose_info_next(struct seq_file *seq, void *v, loff_t *pos)
 {
-       ++*pos;
-
-       return (v == SEQ_START_TOKEN) ? sk_head(&rose_list)
-               : sk_next((struct sock *)v);
+       return seq_hlist_next(v, &rose_list, pos);
 }
 
 static void rose_info_stop(struct seq_file *seq, void *v)
@@ -1444,7 +1428,7 @@ static int rose_info_show(struct seq_file *seq, void *v)
                         "dest_addr  dest_call src_addr   src_call  dev   lci neigh st vs vr va   t  t1  t2  t3  hb    idle Snd-Q Rcv-Q inode\n");
 
        else {
-               struct sock *s = v;
+               struct sock *s = sk_entry(v);
                struct rose_sock *rose = rose_sk(s);
                const char *devname, *callsign;
                const struct net_device *dev = rose->device;