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net: atm: use seq_list_foo() helpers
Simplify seq_file code. Signed-off-by: Li Zefan <lizf@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -238,7 +238,7 @@ static int atm_dev_seq_show(struct seq_file *seq, void *v)
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"Itf Type ESI/\"MAC\"addr "
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"AAL(TX,err,RX,err,drop) ... [refcnt]\n";
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if (v == SEQ_START_TOKEN)
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if (v == &atm_devs)
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seq_puts(seq, atm_dev_banner);
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else {
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struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
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@ -444,21 +444,10 @@ done:
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return error;
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}
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static inline void *dev_get_idx(loff_t left)
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{
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struct list_head *p;
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list_for_each(p, &atm_devs) {
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if (!--left)
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break;
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}
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return (p != &atm_devs) ? p : NULL;
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}
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void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos)
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{
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mutex_lock(&atm_dev_mutex);
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return *pos ? dev_get_idx(*pos) : SEQ_START_TOKEN;
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return seq_list_start_head(&atm_devs, *pos);
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}
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void atm_dev_seq_stop(struct seq_file *seq, void *v)
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@ -468,8 +457,5 @@ void atm_dev_seq_stop(struct seq_file *seq, void *v)
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void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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++*pos;
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v = (v == SEQ_START_TOKEN)
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? atm_devs.next : ((struct list_head *)v)->next;
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return (v == &atm_devs) ? NULL : v;
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return seq_list_next(v, &atm_devs, pos);
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}
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