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authorAlan Cox <alan@lxorguk.ukuu.org.uk>2008-04-30 00:54:13 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-04-30 08:29:47 -0700
commitf34d7a5b7010b82fe97da95496b9971435530062 (patch)
tree87e2abec1e33ed4fe5e63ee2fd000bc2ad745e57 /include/linux/tty.h
parent251b8dd7eee30fda089a1dc088abf4fc9a0dee9c (diff)
tty: The big operations rework
- Operations are now a shared const function block as with most other Linux objects - Introduce wrappers for some optional functions to get consistent behaviour - Wrap put_char which used to be patched by the tty layer - Document which functions are needed/optional - Make put_char report success/fail - Cache the driver->ops pointer in the tty as tty->ops - Remove various surplus lock calls we no longer need - Remove proc_write method as noted by Alexey Dobriyan - Introduce some missing sanity checks where certain driver/ldisc combinations would oops as they didn't check needed methods were present [akpm@linux-foundation.org: fix fs/compat_ioctl.c build] [akpm@linux-foundation.org: fix isicom] [akpm@linux-foundation.org: fix arch/ia64/hp/sim/simserial.c build] [akpm@linux-foundation.org: fix kgdb] Signed-off-by: Alan Cox <alan@redhat.com> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/tty.h')
-rw-r--r--include/linux/tty.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/tty.h b/include/linux/tty.h
index 2699298b00e..c36a76da2ae 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -177,9 +177,13 @@ struct signal_struct;
* size each time the window is created or resized anyway.
* - TYT, 9/14/92
*/
+
+struct tty_operations;
+
struct tty_struct {
int magic;
struct tty_driver *driver;
+ const struct tty_operations *ops;
int index;
struct tty_ldisc ldisc;
struct mutex termios_mutex;
@@ -295,6 +299,10 @@ extern void tty_unregister_device(struct tty_driver *driver, unsigned index);
extern int tty_read_raw_data(struct tty_struct *tty, unsigned char *bufp,
int buflen);
extern void tty_write_message(struct tty_struct *tty, char *msg);
+extern int tty_put_char(struct tty_struct *tty, unsigned char c);
+extern int tty_chars_in_buffer(struct tty_struct *tty);
+extern int tty_write_room(struct tty_struct *tty);
+extern void tty_driver_flush_buffer(struct tty_struct *tty);
extern int is_current_pgrp_orphaned(void);
extern struct pid *tty_get_pgrp(struct tty_struct *tty);