serial_mutex      906 drivers/tty/serial/8250/8250_core.c static DEFINE_MUTEX(serial_mutex);
serial_mutex      981 drivers/tty/serial/8250/8250_core.c 	mutex_lock(&serial_mutex);
serial_mutex     1102 drivers/tty/serial/8250/8250_core.c 	mutex_unlock(&serial_mutex);
serial_mutex     1119 drivers/tty/serial/8250/8250_core.c 	mutex_lock(&serial_mutex);
serial_mutex     1140 drivers/tty/serial/8250/8250_core.c 	mutex_unlock(&serial_mutex);