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[PATCH] timespec: normalize off by one errors

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It would appear that the timespec normalize code has an off by one error.
Found in three places.  Thanks to Ben for spotting.

Signed-off-by: George Anzinger<[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
George Anzinger authored and Linus Torvalds committed 2005-11-13 18:14:17 -08:00
1 parent 09e12f9f6b
commit 3f39894d1b
2 files changed
+4 -8
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include/linux/time.h
+1 -1
View File
@@ -101,7 +101,7 @@ extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
static inline void
set_normalized_timespec (struct timespec *ts, time_t sec, long nsec)
{
while (nsec > NSEC_PER_SEC) {
while (nsec >= NSEC_PER_SEC) {
nsec -= NSEC_PER_SEC;
++sec;
}
kernel/posix-timers.c
+3 -7
View File
@@ -270,7 +270,7 @@ static void tstojiffie(struct timespec *tp, int res, u64 *jiff)
long sec = tp->tv_sec;
long nsec = tp->tv_nsec + res - 1;
if (nsec > NSEC_PER_SEC) {
if (nsec >= NSEC_PER_SEC) {
sec++;
nsec -= NSEC_PER_SEC;
}
@@ -1209,13 +1209,9 @@ static int do_posix_clock_monotonic_get(clockid_t clock, struct timespec *tp)
do_posix_clock_monotonic_gettime_parts(tp, &wall_to_mono);
tp->tv_sec += wall_to_mono.tv_sec;
tp->tv_nsec += wall_to_mono.tv_nsec;
set_normalized_timespec(tp, tp->tv_sec + wall_to_mono.tv_sec,
tp->tv_nsec + wall_to_mono.tv_nsec);
if ((tp->tv_nsec - NSEC_PER_SEC) > 0) {
tp->tv_nsec -= NSEC_PER_SEC;
tp->tv_sec++;
}
return 0;
}