From 5435d20f506f16352a4e1637b8e8fb7c0d422bb9 Mon Sep 17 00:00:00 2001 From: Peter Hurley Date: Tue, 2 Sep 2014 17:39:20 -0400 Subject: [PATCH] serial: 8250: Document serial8250_modem_status() locking Existing callers of serial8250_modem_status() [1] hold the uart port lock; document. [1] In-tree callers of serial8250_modem_status() drivers/tty/serial/8250/8250_fsl.c fsl8250_handle_irq() drivers/tty/serial/8250/8250_core.c serial8250_handle_irq() serial8250_console_write() serial8250_get_mctrl() * * Call graphs for callers of serial8250_get_mctrl() from the function which acquires the uart port lock drivers/tty/serial/serial_core.c uart_port_startup() uart_tiocmget() uart_set_termios() uart_carrier_raised() ops->get_mctrl() ---> serial8250_get_mctrl() Signed-off-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_core.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 46c1f5fc44d3..b597e730b9e7 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -1463,6 +1463,7 @@ void serial8250_tx_chars(struct uart_8250_port *up) } EXPORT_SYMBOL_GPL(serial8250_tx_chars); +/* Caller holds uart port lock */ unsigned int serial8250_modem_status(struct uart_8250_port *up) { struct uart_port *port = &up->port; -- 2.20.1