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Diffstat (limited to 'fs/proc/proc_tty.c')
-rw-r--r--fs/proc/proc_tty.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/proc/proc_tty.c b/fs/proc/proc_tty.c
index c1bbfbeb035..b3a473b0a19 100644
--- a/fs/proc/proc_tty.c
+++ b/fs/proc/proc_tty.c
@@ -108,6 +108,8 @@ 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);
@@ -124,6 +126,7 @@ static void *t_next(struct seq_file *m, void *v, loff_t *pos)
static void t_stop(struct seq_file *m, void *v)
{
+ mutex_unlock(&tty_mutex);
}
static struct seq_operations tty_drivers_op = {