From: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
To: gregkh@linuxfoundation.org
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
"Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Subject: [PATCH 06/15] tty: switch tty_{,un}throttle_safe() to return a bool
Date: Tue, 19 Sep 2023 10:51:47 +0200 [thread overview]
Message-ID: <20230919085156.1578-7-jirislaby@kernel.org> (raw)
In-Reply-To: <20230919085156.1578-1-jirislaby@kernel.org>
They return 0 or 1 -- a boolean value, so make it clear than noone
should expect negative or other values.
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
---
drivers/tty/tty_ioctl.c | 18 ++++++++----------
include/linux/tty.h | 4 ++--
2 files changed, 10 insertions(+), 12 deletions(-)
diff --git a/drivers/tty/tty_ioctl.c b/drivers/tty/tty_ioctl.c
index 7958bf6d27c4..ba60fcf518e0 100644
--- a/drivers/tty/tty_ioctl.c
+++ b/drivers/tty/tty_ioctl.c
@@ -124,17 +124,16 @@ EXPORT_SYMBOL(tty_unthrottle);
* conditions when throttling is conditional on factors evaluated prior to
* throttling.
*
- * Returns 0 if tty is throttled (or was already throttled)
+ * Returns false if tty is throttled (or was already throttled)
*/
-
-int tty_throttle_safe(struct tty_struct *tty)
+bool tty_throttle_safe(struct tty_struct *tty)
{
- int ret = 0;
+ bool ret = false;
mutex_lock(&tty->throttle_mutex);
if (!tty_throttled(tty)) {
if (tty->flow_change != TTY_THROTTLE_SAFE)
- ret = 1;
+ ret = true;
else {
set_bit(TTY_THROTTLED, &tty->flags);
if (tty->ops->throttle)
@@ -155,17 +154,16 @@ int tty_throttle_safe(struct tty_struct *tty)
* unthrottle due to race conditions when unthrottling is conditional
* on factors evaluated prior to unthrottling.
*
- * Returns 0 if tty is unthrottled (or was already unthrottled)
+ * Returns false if tty is unthrottled (or was already unthrottled)
*/
-
-int tty_unthrottle_safe(struct tty_struct *tty)
+bool tty_unthrottle_safe(struct tty_struct *tty)
{
- int ret = 0;
+ bool ret = false;
mutex_lock(&tty->throttle_mutex);
if (tty_throttled(tty)) {
if (tty->flow_change != TTY_UNTHROTTLE_SAFE)
- ret = 1;
+ ret = true;
else {
clear_bit(TTY_THROTTLED, &tty->flags);
if (tty->ops->unthrottle)
diff --git a/include/linux/tty.h b/include/linux/tty.h
index f002d0f25db7..59d675f345e9 100644
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -416,8 +416,8 @@ unsigned int tty_chars_in_buffer(struct tty_struct *tty);
unsigned int tty_write_room(struct tty_struct *tty);
void tty_driver_flush_buffer(struct tty_struct *tty);
void tty_unthrottle(struct tty_struct *tty);
-int tty_throttle_safe(struct tty_struct *tty);
-int tty_unthrottle_safe(struct tty_struct *tty);
+bool tty_throttle_safe(struct tty_struct *tty);
+bool tty_unthrottle_safe(struct tty_struct *tty);
int tty_do_resize(struct tty_struct *tty, struct winsize *ws);
int tty_get_icount(struct tty_struct *tty,
struct serial_icounter_struct *icount);
--
2.42.0
next prev parent reply other threads:[~2023-09-19 8:52 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-19 8:51 [PATCH 00/15] random tty fixes Jiri Slaby (SUSE)
2023-09-19 8:51 ` [PATCH 01/15] tty: n_tty: use 'retval' instead of 'c' Jiri Slaby (SUSE)
2023-09-19 8:51 ` [PATCH 02/15] tty: n_tty: rename and retype 'retval' in n_tty_ioctl() Jiri Slaby (SUSE)
2023-09-19 8:51 ` [PATCH 03/15] tty: n_tty: use min3() in copy_from_read_buf() Jiri Slaby (SUSE)
2023-09-19 8:51 ` [PATCH 04/15] tty: n_tty: invert the condition " Jiri Slaby (SUSE)
2023-09-19 9:54 ` Ilpo Järvinen
2023-09-19 10:43 ` Jiri Slaby
2023-09-19 8:51 ` [PATCH 05/15] tty: n_tty: use do-while in n_tty_check_{,un}throttle() Jiri Slaby (SUSE)
2023-09-19 8:51 ` Jiri Slaby (SUSE) [this message]
2023-09-19 8:51 ` [PATCH 07/15] tty: invert return values of tty_{,un}throttle_safe() Jiri Slaby (SUSE)
2023-09-19 8:51 ` [PATCH 08/15] tty: fix up and plug in tty_ioctl kernel-doc Jiri Slaby (SUSE)
2023-09-19 8:51 ` [PATCH 09/15] tty: fix kernel-doc for functions in tty.h Jiri Slaby (SUSE)
2023-09-19 10:07 ` Ilpo Järvinen
2023-09-19 10:45 ` Jiri Slaby
2023-09-19 10:47 ` Jiri Slaby
2023-09-19 10:51 ` Ilpo Järvinen
2023-09-19 8:51 ` [PATCH 10/15] tty: stop using ndash in kernel-doc Jiri Slaby (SUSE)
2023-09-19 8:51 ` [PATCH 11/15] tty: tty_buffer: use bool for 'restart' in tty_buffer_unlock_exclusive() Jiri Slaby (SUSE)
2023-09-19 8:51 ` [PATCH 12/15] tty: convert THROTTLE constants into enum Jiri Slaby (SUSE)
2023-09-19 10:10 ` Ilpo Järvinen
2023-09-19 10:51 ` Jiri Slaby
2023-09-19 8:51 ` [PATCH 13/15] tty: early return from send_break() on TTY_DRIVER_HARDWARE_BREAK Jiri Slaby (SUSE)
2023-09-19 8:51 ` [PATCH 14/15] tty: don't check for signal_pending() in send_break() Jiri Slaby (SUSE)
2023-09-19 10:14 ` Ilpo Järvinen
2023-09-19 8:51 ` [PATCH 15/15] tty: use 'if' in send_break() instead of 'goto' Jiri Slaby (SUSE)
2023-09-19 10:17 ` [PATCH 00/15] random tty fixes Ilpo Järvinen
2023-09-19 10:21 ` Greg Kroah-Hartman
2023-09-19 10:53 ` Ilpo Järvinen
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