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-rw-r--r--drivers/tty/tty_port.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/tty/tty_port.c b/drivers/tty/tty_port.c
index 69e072b59127..7309594e1c12 100644
--- a/drivers/tty/tty_port.c
+++ b/drivers/tty/tty_port.c
@@ -227,6 +227,8 @@ out:
*
* Perform port level tty hangup flag and count changes. Drop the tty
* reference.
+ *
+ * Caller holds tty lock.
*/
void tty_port_hangup(struct tty_port *port)