From: Lars-Peter Clausen <lars@metafoo.de>
To: Wim Van Sebroeck <wim@linux-watchdog.org>,
Guenter Roeck <linux@roeck-us.net>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
enjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
linux-watchdog@vger.kernel.org,
Lars-Peter Clausen <lars@metafoo.de>
Subject: [PATCH] watchdog: Use DIV_ROUND_UP() instead of open-coding it
Date: Sat, 20 Mar 2021 09:29:56 +0100 [thread overview]
Message-ID: <20210320082956.27689-1-lars@metafoo.de> (raw)
Use DIV_ROUND_UP() instead of open-coding it. This makes it more clear
what is going on for the casual reviewer.
Generated using the following the Coccinelle semantic patch.
// <smpl>
@r1@
expression x;
constant C1;
constant C2;
@@
((x) + C1) / C2
@script:python@
C1 << r1.C1;
C2 << r1.C2;
@@
print C1, C2
try:
if int(C1) != int(C2) - 1 or int(C1) == 1:
cocci.include_match(False)
except:
cocci.include_match(False)
@@
expression r1.x;
constant r1.C1;
constant r1.C2;
@@
-(((x) + C1) / C2)
+DIV_ROUND_UP(x, C2)
// </smpl>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
---
drivers/watchdog/riowd.c | 2 +-
drivers/watchdog/w83977f_wdt.c | 2 +-
drivers/watchdog/wdrtas.c | 2 +-
drivers/watchdog/wdt977.c | 2 +-
4 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/drivers/watchdog/riowd.c b/drivers/watchdog/riowd.c
index 7008596a575f..aa8a929505b5 100644
--- a/drivers/watchdog/riowd.c
+++ b/drivers/watchdog/riowd.c
@@ -132,7 +132,7 @@ static long riowd_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return -EFAULT;
if ((new_margin < 60) || (new_margin > (255 * 60)))
return -EINVAL;
- riowd_timeout = (new_margin + 59) / 60;
+ riowd_timeout = DIV_ROUND_UP(new_margin, 60);
riowd_writereg(p, riowd_timeout, WDTO_INDEX);
fallthrough;
diff --git a/drivers/watchdog/w83977f_wdt.c b/drivers/watchdog/w83977f_wdt.c
index fd64ae77780a..fbc31c4a1e0b 100644
--- a/drivers/watchdog/w83977f_wdt.c
+++ b/drivers/watchdog/w83977f_wdt.c
@@ -231,7 +231,7 @@ static int wdt_set_timeout(int t)
if (t < 15)
return -EINVAL;
- tmrval = ((t + 15) + 29) / 30;
+ tmrval = DIV_ROUND_UP(t + 15, 30);
if (tmrval > 255)
return -EINVAL;
diff --git a/drivers/watchdog/wdrtas.c b/drivers/watchdog/wdrtas.c
index c00627825de8..0c21ee535a74 100644
--- a/drivers/watchdog/wdrtas.c
+++ b/drivers/watchdog/wdrtas.c
@@ -75,7 +75,7 @@ static int wdrtas_set_interval(int interval)
static int print_msg = 10;
/* rtas uses minutes */
- interval = (interval + 59) / 60;
+ interval = DIV_ROUND_UP(interval, 60);
result = rtas_call(wdrtas_token_set_indicator, 3, 1, NULL,
WDRTAS_SURVEILLANCE_IND, 0, interval);
diff --git a/drivers/watchdog/wdt977.c b/drivers/watchdog/wdt977.c
index c9b8e863f70f..7cff1300be3e 100644
--- a/drivers/watchdog/wdt977.c
+++ b/drivers/watchdog/wdt977.c
@@ -201,7 +201,7 @@ static int wdt977_set_timeout(int t)
int tmrval;
/* convert seconds to minutes, rounding up */
- tmrval = (t + 59) / 60;
+ tmrval = DIV_ROUND_UP(t, 60);
if (machine_is_netwinder()) {
/* we have a hw bug somewhere, so each 977 minute is actually
--
2.20.1
next reply other threads:[~2021-03-20 12:08 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-20 8:29 Lars-Peter Clausen [this message]
2021-03-20 15:32 ` [PATCH] watchdog: Use DIV_ROUND_UP() instead of open-coding it Guenter Roeck
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