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tty: add throttle/unthrottle helpers

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Something Arjan suggested which allows us to clean up the code nicely

Signed-off-by: Alan Cox <alan@redhat.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox 2008-04-30 00:54:18 -07:00 • committed by Linus Torvalds
parent 8cd64518a3
commit 39c2e60f8c
9 changed files with 31 additions and 25 deletions
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4
include/linux/tty_driver.h
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@ -100,6 +100,8 @@
* This routine notifies the tty driver that input buffers for
* the line discipline are close to full, and it should somehow
* signal that no more characters should be sent to the tty.
*
* Optional: Always invoke via tty_throttle();
*
* void (*unthrottle)(struct tty_struct * tty);
*
@ -107,6 +109,8 @@
* that characters can now be sent to the tty without fear of
* overrunning the input buffers of the line disciplines.
*
* Optional: Always invoke via tty_unthrottle();
*
* void (*stop)(struct tty_struct *tty);
*
* This routine notifies the tty driver that it should stop