TTY: serial, remove tasklet for tty_wakeup

tty_wakeup can be called from any context. So there is no need to have
an extra tasklet for calling that. Hence save some space and remove
the tasklet completely.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 1 insertions, 20 deletions

diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index 2cbf1bd493e2..4786232bc532 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -72,7 +72,7 @@ void uart_write_wakeup(struct uart_port *port)
          * closed.  No cookie for you.
          */
         BUG_ON(!state);
-        tasklet_schedule(&state->tlet);
+        tty_wakeup(state->port.tty);
 }
 
 static void uart_stop(struct tty_struct *tty)
@@ -107,12 +107,6 @@ static void uart_start(struct tty_struct *tty)
         spin_unlock_irqrestore(&port->lock, flags);
 }
 
-static void uart_tasklet_action(unsigned long data)
-{
-        struct uart_state *state = (struct uart_state *)data;
-        tty_wakeup(state->port.tty);
-}
-
 static inline void
 uart_update_mctrl(struct uart_port *port, unsigned int set, unsigned int clear)
 {
@@ -250,11 +244,6 @@ static void uart_shutdown(struct tty_struct *tty, struct uart_state *state)
         }
 
         /*
-         * kill off our tasklet
-         */
-        tasklet_kill(&state->tlet);
-
-        /*
          * Free the transmit buffer page.
          */
         if (state->xmit.buf) {
@@ -2277,8 +2266,6 @@ int uart_register_driver(struct uart_driver *drv)
                 port->ops = &uart_port_ops;
                 port->close_delay     = 500;    /* .5 seconds */
                 port->closing_wait    = 30000;  /* 30 seconds */
-                tasklet_init(&state->tlet, uart_tasklet_action,
-                             (unsigned long)state);
         }
 
         retval = tty_register_driver(normal);
@@ -2439,11 +2426,6 @@ int uart_remove_one_port(struct uart_driver *drv, struct uart_port *uport)
          */
         uport->type = PORT_UNKNOWN;
 
-        /*
-         * Kill the tasklet, and free resources.
-         */
-        tasklet_kill(&state->tlet);
-
         state->uart_port = NULL;
         mutex_unlock(&port_mutex);
 
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index a5c31146a337..76e110363745 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -384,7 +384,6 @@ struct uart_state {
         int                     pm_state;
         struct circ_buf         xmit;
 
-        struct tasklet_struct   tlet;
         struct uart_port        *uart_port;
 };