linux-kernel - [PATCH 13/13] net: atm: use seq_list

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Message-ID: <4B71292F.8030806@cn.fujitsu.com>
Date:	Tue, 09 Feb 2010 17:21:51 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	David Miller <davem@...emloft.net>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH 13/13] net: atm: use seq_list_foo() helpers

Simplify seq_file code.

Signed-off-by: Li Zefan <lizf@...fujitsu.com>
---
 net/atm/proc.c      |    2 +-
 net/atm/resources.c |   18 ++----------------
 2 files changed, 3 insertions(+), 17 deletions(-)

diff --git a/net/atm/proc.c b/net/atm/proc.c
index ab8419a..c0c3a79 100644
--- a/net/atm/proc.c
+++ b/net/atm/proc.c
@@ -236,7 +236,7 @@ static int atm_dev_seq_show(struct seq_file *seq, void *v)
 		"Itf Type    ESI/\"MAC\"addr "
 		"AAL(TX,err,RX,err,drop) ...               [refcnt]\n";
 
-	if (v == SEQ_START_TOKEN)
+	if (v == &atm_devs)
 		seq_puts(seq, atm_dev_banner);
 	else {
 		struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list);
diff --git a/net/atm/resources.c b/net/atm/resources.c
index f4091d6..bbd01b0 100644
--- a/net/atm/resources.c
+++ b/net/atm/resources.c
@@ -454,21 +454,10 @@ done:
 	return error;
 }
 
-static inline void *dev_get_idx(loff_t left)
-{
-	struct list_head *p;
-
-	list_for_each(p, &atm_devs) {
-		if (!--left)
-			break;
-	}
-	return (p != &atm_devs) ? p : NULL;
-}
-
 void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos)
 {
 	mutex_lock(&atm_dev_mutex);
-	return *pos ? dev_get_idx(*pos) : SEQ_START_TOKEN;
+	return seq_list_start_head(&atm_devs, *pos);
 }
 
 void atm_dev_seq_stop(struct seq_file *seq, void *v)
@@ -478,8 +467,5 @@ void atm_dev_seq_stop(struct seq_file *seq, void *v)
 
 void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
-	++*pos;
-	v = (v == SEQ_START_TOKEN)
-		? atm_devs.next : ((struct list_head *)v)->next;
-	return (v == &atm_devs) ? NULL : v;
+	return seq_list_next(v, &atm_devs, pos);
 }
-- 
1.6.3

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