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Diffstat (limited to 'kernel/drivers/tty/tty_mutex.c')
-rw-r--r--kernel/drivers/tty/tty_mutex.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/drivers/tty/tty_mutex.c b/kernel/drivers/tty/tty_mutex.c
index 0efcf713b..d09293bc0 100644
--- a/kernel/drivers/tty/tty_mutex.c
+++ b/kernel/drivers/tty/tty_mutex.c
@@ -22,6 +22,14 @@ void __lockfunc tty_lock(struct tty_struct *tty)
}
EXPORT_SYMBOL(tty_lock);
+int tty_lock_interruptible(struct tty_struct *tty)
+{
+ if (WARN(tty->magic != TTY_MAGIC, "L Bad %p\n", tty))
+ return -EIO;
+ tty_kref_get(tty);
+ return mutex_lock_interruptible(&tty->legacy_mutex);
+}
+
void __lockfunc tty_unlock(struct tty_struct *tty)
{
if (tty->magic != TTY_MAGIC) {