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authorAlan Cox <alan@redhat.com>2008-10-13 10:42:09 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-13 09:51:42 -0700
commit7d7b93c1452f381350dbaf276a63357fa6559e6d (patch)
tree02ce0c37e7fea66d1e8af20111d92171bfc0ff1d /include/linux/tty_driver.h
parent99f1fe189daf8e99a847e420567e49dd7ee2aae7 (diff)
downloadblackbird-op-linux-7d7b93c1452f381350dbaf276a63357fa6559e6d.tar.gz
blackbird-op-linux-7d7b93c1452f381350dbaf276a63357fa6559e6d.zip
tty: kref the tty driver object
Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/tty_driver.h')
-rw-r--r--include/linux/tty_driver.h15
1 files changed, 11 insertions, 4 deletions
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 2c5c35c4656f..ba891dd23550 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -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
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