diff options
Diffstat (limited to 'include/linux/serial_core.h')
| -rw-r--r-- | include/linux/serial_core.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 8872cd21e70a..2cf03ff2056a 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -609,6 +609,23 @@ static inline void __uart_port_unlock_irqrestore(struct uart_port *up, unsigned } /** + * uart_port_set_cons - Safely set the @cons field for a uart + * @up: The uart port to set + * @con: The new console to set to + * + * This function must be used to set @up->cons. It uses the port lock to + * synchronize with the port lock wrappers in order to ensure that the console + * cannot change or disappear while another context is holding the port lock. + */ +static inline void uart_port_set_cons(struct uart_port *up, struct console *con) +{ + unsigned long flags; + + __uart_port_lock_irqsave(up, &flags); + up->cons = con; + __uart_port_unlock_irqrestore(up, flags); +} +/** * uart_port_lock - Lock the UART port * @up: Pointer to UART port structure */ |