diff options
| author |   Julia Lawall <julia@diku.dk> | 2008-04-28 02:11:59 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-28 08:58:17 -0700 |
| commit | dca03a51549bc645685fb8a77efa64df531666c3 (patch) | |
| tree | 558985a9c87d132de23719b6dfe49e2379a6e8e1 | |
| parent | rtc: add the support for alarm time relative to current time in sysfs (diff) | |
| download | linux-dev-dca03a51549bc645685fb8a77efa64df531666c3.tar.xz linux-dev-dca03a51549bc645685fb8a77efa64df531666c3.zip | |
drivers/char/rtc.c: use time_before, time_before_eq, etc
The functions time_before, time_before_eq, time_after, and time_after_eq
are more robust for comparing jiffies against other values.
A simplified version of the semantic patch making this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@ change_compare_np @
expression E;
@@
(
- jiffies <= E
+ time_before_eq(jiffies,E)
|
- jiffies >= E
+ time_after_eq(jiffies,E)
|
- jiffies < E
+ time_before(jiffies,E)
|
- jiffies > E
+ time_after(jiffies,E)
)
@ include depends on change_compare_np @
@@
#include <linux/jiffies.h>
@ no_include depends on !include && change_compare_np @
@@
#include <linux/...>
+ #include <linux/jiffies.h>
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | drivers/char/rtc.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c index 5c3142b6f1fc..e2ec2ee4cf79 100644 --- a/drivers/char/rtc.c +++ b/drivers/char/rtc.c @@ -88,6 +88,7 @@ #ifdef CONFIG_SPARC32 #include <linux/pci.h> +#include <linux/jiffies.h> #include <asm/ebus.h> static unsigned long rtc_port; @@ -1316,7 +1317,8 @@ void rtc_get_rtc_time(struct rtc_time *rtc_tm) * Once the read clears, read the RTC time (again via ioctl). Easy. */ - while (rtc_is_updating() != 0 && jiffies - uip_watchdog < 2*HZ/100) + while (rtc_is_updating() != 0 && + time_before(jiffies, uip_watchdog + 2*HZ/100)) cpu_relax(); /* |