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tty: The big operations rework

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- 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

[[email protected]: fix fs/compat_ioctl.c build]
[[email protected]: fix isicom]
[[email protected]: fix arch/ia64/hp/sim/simserial.c build]
[[email protected]: fix kgdb]
Signed-off-by: Alan Cox <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Cc: Jason Wessel <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Alan Cox 2008-04-30 00:54:13 -07:00 • committed by Linus Torvalds
commit f34d7a5b70
30 changed files with 537 additions and 664 deletions
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6
net/irda/ircomm/ircomm_tty.c
View file

@ -555,10 +555,8 @@ static void ircomm_tty_close(struct tty_struct *tty, struct file *filp)
ircomm_tty_shutdown(self);
if (tty->driver->flush_buffer)
tty->driver->flush_buffer(tty);
if (tty->ldisc.flush_buffer)
tty->ldisc.flush_buffer(tty);
tty_driver_flush_buffer(tty);
tty_ldisc_flush(tty);
tty->closing = 0;
self->tty = NULL;