Make /proc/tty/drivers use seq_list_xxx helpers

Simple and stupid like some previous ones.  Just use new API.

Signed-off-by: Pavel Emelianov <xemul@openvz.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/proc/proc_tty.c b/fs/proc/proc_tty.c
index b3a473b..2284622 100644 (file)
--- a/fs/proc/proc_tty.c
+++ b/fs/proc/proc_tty.c
@@ -69,7 +69,7 @@ static void show_tty_range(struct seq_file *m, struct tty_driver *p,
 
 static int show_tty_driver(struct seq_file *m, void *v)
 {
-       struct tty_driver *p = v;
+       struct tty_driver *p = list_entry(v, struct tty_driver, tty_drivers);
        dev_t from = MKDEV(p->major, p->minor_start);
        dev_t to = from + p->num;
 
@@ -106,22 +106,13 @@ static int show_tty_driver(struct seq_file *m, void *v)
 /* iterator */
 static void *t_start(struct seq_file *m, loff_t *pos)
 {
-       struct list_head *p;
-       loff_t l = *pos;
-
        mutex_lock(&tty_mutex);
-       list_for_each(p, &tty_drivers)
-               if (!l--)
-                       return list_entry(p, struct tty_driver, tty_drivers);
-       return NULL;
+       return seq_list_start(&tty_drivers, *pos);
 }
 
 static void *t_next(struct seq_file *m, void *v, loff_t *pos)
 {
-       struct list_head *p = ((struct tty_driver *)v)->tty_drivers.next;
-       (*pos)++;
-       return p==&tty_drivers ? NULL :
-                       list_entry(p, struct tty_driver, tty_drivers);
+       return seq_list_next(v, &tty_drivers, pos);
 }
 
 static void t_stop(struct seq_file *m, void *v)