diff options
-rw-r--r-- | drivers/tty/serial/serial_core.c | 83 | ||||
-rw-r--r-- | include/linux/serial_core.h | 84 |
2 files changed, 88 insertions, 79 deletions
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c index 7b87c08f5bcb..76e506ee335c 100644 --- a/drivers/tty/serial/serial_core.c +++ b/drivers/tty/serial/serial_core.c @@ -3082,6 +3082,89 @@ void uart_insert_char(struct uart_port *port, unsigned int status, } EXPORT_SYMBOL_GPL(uart_insert_char); +int uart_handle_sysrq_char(struct uart_port *port, unsigned int ch) +{ + if (!IS_ENABLED(CONFIG_MAGIC_SYSRQ_SERIAL)) + return 0; + + if (!port->has_sysrq || !port->sysrq) + return 0; + + if (ch && time_before(jiffies, port->sysrq)) { + handle_sysrq(ch); + port->sysrq = 0; + return 1; + } + port->sysrq = 0; + + return 0; +} +EXPORT_SYMBOL_GPL(uart_handle_sysrq_char); + +int uart_prepare_sysrq_char(struct uart_port *port, unsigned int ch) +{ + if (!IS_ENABLED(CONFIG_MAGIC_SYSRQ_SERIAL)) + return 0; + + if (!port->has_sysrq || !port->sysrq) + return 0; + + if (ch && time_before(jiffies, port->sysrq)) { + port->sysrq_ch = ch; + port->sysrq = 0; + return 1; + } + port->sysrq = 0; + + return 0; +} +EXPORT_SYMBOL_GPL(uart_prepare_sysrq_char); + +void uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long irqflags) +{ + int sysrq_ch; + + if (!port->has_sysrq) { + spin_unlock_irqrestore(&port->lock, irqflags); + return; + } + + sysrq_ch = port->sysrq_ch; + port->sysrq_ch = 0; + + spin_unlock_irqrestore(&port->lock, irqflags); + + if (sysrq_ch) + handle_sysrq(sysrq_ch); +} +EXPORT_SYMBOL_GPL(uart_unlock_and_check_sysrq); + +/* + * We do the SysRQ and SAK checking like this... + */ +int uart_handle_break(struct uart_port *port) +{ + struct uart_state *state = port->state; + + if (port->handle_break) + port->handle_break(port); + + if (port->has_sysrq) { + if (port->cons && port->cons->index == port->line) { + if (!port->sysrq) { + port->sysrq = jiffies + HZ*5; + return 1; + } + port->sysrq = 0; + } + } + + if (port->flags & UPF_SAK) + do_SAK(state->port.tty); + return 0; +} +EXPORT_SYMBOL_GPL(uart_handle_break); + EXPORT_SYMBOL(uart_write_wakeup); EXPORT_SYMBOL(uart_register_driver); EXPORT_SYMBOL(uart_unregister_driver); diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h index 9cf1682dc580..255e86a474e9 100644 --- a/include/linux/serial_core.h +++ b/include/linux/serial_core.h @@ -460,85 +460,11 @@ extern void uart_handle_cts_change(struct uart_port *uport, extern void uart_insert_char(struct uart_port *port, unsigned int status, unsigned int overrun, unsigned int ch, unsigned int flag); -static inline int -uart_handle_sysrq_char(struct uart_port *port, unsigned int ch) -{ - if (!IS_ENABLED(CONFIG_MAGIC_SYSRQ_SERIAL)) - return 0; - - if (!port->has_sysrq || !port->sysrq) - return 0; - - if (ch && time_before(jiffies, port->sysrq)) { - handle_sysrq(ch); - port->sysrq = 0; - return 1; - } - port->sysrq = 0; - - return 0; -} -static inline int -uart_prepare_sysrq_char(struct uart_port *port, unsigned int ch) -{ - if (!IS_ENABLED(CONFIG_MAGIC_SYSRQ_SERIAL)) - return 0; - - if (!port->has_sysrq || !port->sysrq) - return 0; - - if (ch && time_before(jiffies, port->sysrq)) { - port->sysrq_ch = ch; - port->sysrq = 0; - return 1; - } - port->sysrq = 0; - - return 0; -} -static inline void -uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long irqflags) -{ - int sysrq_ch; - - if (!port->has_sysrq) { - spin_unlock_irqrestore(&port->lock, irqflags); - return; - } - - sysrq_ch = port->sysrq_ch; - port->sysrq_ch = 0; - - spin_unlock_irqrestore(&port->lock, irqflags); - - if (sysrq_ch) - handle_sysrq(sysrq_ch); -} - -/* - * We do the SysRQ and SAK checking like this... - */ -static inline int uart_handle_break(struct uart_port *port) -{ - struct uart_state *state = port->state; - - if (port->handle_break) - port->handle_break(port); - - if (port->has_sysrq) { - if (port->cons && port->cons->index == port->line) { - if (!port->sysrq) { - port->sysrq = jiffies + HZ*5; - return 1; - } - port->sysrq = 0; - } - } - - if (port->flags & UPF_SAK) - do_SAK(state->port.tty); - return 0; -} +extern int uart_handle_sysrq_char(struct uart_port *port, unsigned int ch); +extern int uart_prepare_sysrq_char(struct uart_port *port, unsigned int ch); +extern void uart_unlock_and_check_sysrq(struct uart_port *port, + unsigned long irqflags); +extern int uart_handle_break(struct uart_port *port); /* * UART_ENABLE_MS - determine if port should enable modem status irqs |