diff options
| author | Alan Cox <alan@linux.intel.com> | 2009-09-19 13:13:32 -0700 |
|---|---|---|
| committer | Live-CD User <linux@linux.site> | 2009-09-19 13:13:32 -0700 |
| commit | b58d13a0216d4e0753668214f23e1d2c24c30f8c (patch) | |
| tree | e641971a9f1464b7f5a045d4df0e58874b6bf035 /include | |
| parent | bdc04e3174e18f475289fa8f4144f66686326b7e (diff) | |
serial: move port users helper
This little helper is now tty_port specific and useful generally so move it
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/tty.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h index 0daa8a72b17..a0e03309a37 100644 --- a/include/linux/tty.h +++ b/include/linux/tty.h @@ -467,6 +467,11 @@ extern int tty_port_close_start(struct tty_port *port, extern void tty_port_close_end(struct tty_port *port, struct tty_struct *tty); extern void tty_port_close(struct tty_port *port, struct tty_struct *tty, struct file *filp); +extern inline int tty_port_users(struct tty_port *port) +{ + return port->count + port->blocked_open; +} + extern int tty_register_ldisc(int disc, struct tty_ldisc_ops *new_ldisc); extern int tty_unregister_ldisc(int disc); extern int tty_set_ldisc(struct tty_struct *tty, int ldisc); |