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tty: kref the tty driver object

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Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-10-13 10:42:09 +01:00 • committed by Linus Torvalds
parent 99f1fe189d
commit 7d7b93c145
5 changed files with 81 additions and 59 deletions
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15
include/linux/tty_driver.h
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@ -253,6 +253,7 @@ struct tty_operations {
struct tty_driver {
int magic; /* magic number for this structure */
struct kref kref; /* Reference management */
struct cdev cdev;
struct module *owner;
const char *driver_name;
@ -266,7 +267,6 @@ struct tty_driver {
short subtype; /* subtype of tty driver */
struct ktermios init_termios; /* Initial termios */
int flags; /* tty driver flags */
int refcount; /* for loadable tty drivers */
struct proc_dir_entry *proc_entry; /* /proc fs entry */
struct tty_driver *other; /* only used for the PTY driver */
@ -288,12 +288,19 @@ struct tty_driver {
extern struct list_head tty_drivers;
struct tty_driver *alloc_tty_driver(int lines);
void put_tty_driver(struct tty_driver *driver);
void tty_set_operations(struct tty_driver *driver,
extern struct tty_driver *alloc_tty_driver(int lines);
extern void put_tty_driver(struct tty_driver *driver);
extern void tty_set_operations(struct tty_driver *driver,
const struct tty_operations *op);
extern struct tty_driver *tty_find_polling_driver(char *name, int *line);
extern void tty_driver_kref_put(struct tty_driver *driver);
extern inline struct tty_driver *tty_driver_kref_get(struct tty_driver *d)
{
kref_get(&d->kref);
return d;
}
/* tty driver magic number */
#define TTY_DRIVER_MAGIC 0x5402