1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index 3f4ad9885430..6556f7452ba6 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -962,12 +962,14 @@ static ssize_t tty_read(struct file *file, char __user *buf, size_t count,
 }
 
 void tty_write_unlock(struct tty_struct *tty)
+        __releases(&tty->atomic_write_lock)
 {
         mutex_unlock(&tty->atomic_write_lock);
         wake_up_interruptible_poll(&tty->write_wait, POLLOUT);
 }
 
 int tty_write_lock(struct tty_struct *tty, int ndelay)
+        __acquires(&tty->atomic_write_lock)
 {
         if (!mutex_trylock(&tty->atomic_write_lock)) {
                 if (ndelay)