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Diffstat (limited to 'include/linux/tty_driver.h')
-rw-r--r--include/linux/tty_driver.h13
1 files changed, 11 insertions, 2 deletions
diff --git a/include/linux/tty_driver.h b/include/linux/tty_driver.h
index 3566129384a..b0867798252 100644
--- a/include/linux/tty_driver.h
+++ b/include/linux/tty_driver.h
@@ -45,8 +45,16 @@
*
* void (*shutdown)(struct tty_struct * tty);
*
- * This routine is called when a particular tty device is closed for
- * the last time freeing up the resources.
+ * This routine is called synchronously when a particular tty device
+ * is closed for the last time freeing up the resources.
+ *
+ *
+ * void (*cleanup)(struct tty_struct * tty);
+ *
+ * This routine is called asynchronously when a particular tty device
+ * is closed for the last time freeing up the resources. This is
+ * actually the second part of shutdown for routines that might sleep.
+ *
*
* int (*write)(struct tty_struct * tty,
* const unsigned char *buf, int count);
@@ -233,6 +241,7 @@ struct tty_operations {
int (*open)(struct tty_struct * tty, struct file * filp);
void (*close)(struct tty_struct * tty, struct file * filp);
void (*shutdown)(struct tty_struct *tty);
+ void (*cleanup)(struct tty_struct *tty);
int (*write)(struct tty_struct * tty,
const unsigned char *buf, int count);
int (*put_char)(struct tty_struct *tty, unsigned char ch);