UNTESTED so far
--
tty, add tty_schedule_wakeup
Because several drivers schedule a workqueue only for tty_wakeup, move this
functionality into tty layer and use newly added centralized work.
Signed-off-by: Jiri Slaby <[email protected]>
Cc: Alan Cox <[email protected]>
---
commit 0e9d5add01e8835407bd9f67b9fd82f98e19e122
tree a566aa490d247b5d5b9ff8e6ed437268c495f86b
parent 1ce760b56883d3c99b914266bca939f8d3ade1fd
author Jiri Slaby <[email protected]> Thu, 01 Nov 2007 10:56:24 +0100
committer Jiri Slaby <[email protected]> Thu, 01 Nov 2007 10:56:24 +0100
drivers/char/tty_io.c | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 0eb979d..fd4a0e4 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -112,6 +112,7 @@
#define TTY_WORK_HANGUP 1
#define TTY_WORK_SAK 2
+#define TTY_WORK_WAKEUP 3
struct ktermios tty_std_termios = { /* for the benefit of tty drivers */
.c_iflag = ICRNL | IXON,
@@ -1296,6 +1297,20 @@ void tty_wakeup(struct tty_struct *tty)
EXPORT_SYMBOL_GPL(tty_wakeup);
/**
+ * tty_schedule_wakeup - request more data
+ * @tty: terminal
+ *
+ * Functionally the same as tty_wakeup, but it can be used in hot
+ * paths. since the wakeup is scheduled and done in the future.
+ */
+void tty_schedule_wakeup(struct tty_struct *tty)
+{
+ set_bit(TTY_WORK_WAKEUP, tty->work_todo);
+ schedule_work(&tty->work);
+}
+EXPORT_SYMBOL_GPL(tty_schedule_wakeup);
+
+/**
* tty_ldisc_flush - flush line discipline queue
* @tty: tty
*
@@ -3599,6 +3614,8 @@ static void tty_work(struct work_struct *work)
do_tty_hangup(tty);
if (test_and_clear_bit(TTY_WORK_SAK, tty->work_todo))
__do_SAK(tty);
+ if (test_and_clear_bit(TTY_WORK_WAKEUP, tty->work_todo))
+ tty_wakeup(tty);
}
/**
-
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