And make an explicit constant for zero too. This allows for easier type
checking of the parameter.
Note: tty_struct::flow_change is kept as int because include/tty.h
(tty_struct) doesn't see tty/tty.h (this enum).
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@xxxxxxxxxx>
---
drivers/tty/tty.h | 13 +++++++++----
drivers/tty/tty_ioctl.c | 2 +-
2 files changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/tty/tty.h b/drivers/tty/tty.h
index 50862f98273e..93cf5ef1e857 100644
--- a/drivers/tty/tty.h
+++ b/drivers/tty/tty.h
@@ -41,15 +41,20 @@ enum {
};
/* Values for tty->flow_change */
-#define TTY_THROTTLE_SAFE 1
-#define TTY_UNTHROTTLE_SAFE 2
+enum tty_flow_change {
+ TTY_FLOW_NO_CHANGE,
+ TTY_THROTTLE_SAFE,
+ TTY_UNTHROTTLE_SAFE,
+};
-static inline void __tty_set_flow_change(struct tty_struct *tty, int val)
+static inline void __tty_set_flow_change(struct tty_struct *tty,
+ enum tty_flow_change val)
{
tty->flow_change = val;
}
-static inline void tty_set_flow_change(struct tty_struct *tty, int val)
+static inline void tty_set_flow_change(struct tty_struct *tty,
+ enum tty_flow_change val)
{
tty->flow_change = val;
smp_mb();
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index 42c793e9d131..4b499301a3db 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -104,7 +104,7 @@ void tty_unthrottle(struct tty_struct *tty)
if (test_and_clear_bit(TTY_THROTTLED, &tty->flags) &&
tty->ops->unthrottle)
tty->ops->unthrottle(tty);
- tty->flow_change = 0;
+ tty->flow_change = TTY_FLOW_NO_CHANGE;
up_write(&tty->termios_rwsem);
}
EXPORT_SYMBOL(tty_unthrottle);
--
2.42.0
