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| author | George Anzinger <george@mvista.com> | 2005-11-13 16:07:44 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-13 18:14:17 -0800 |
| commit | 3f39894d1b5c253b10fcb8fbbbcf65a330f6cdc7 (patch) | |
| tree | 6d166da37e874f2c0b891d4cf61b5f4b9bf5a71f | |
| parent | 09e12f9f6bcd9af516d901223cebdbae58b32c9f (diff) | |
| download | linux-stable-3f39894d1b5c253b10fcb8fbbbcf65a330f6cdc7.tar.gz linux-stable-3f39894d1b5c253b10fcb8fbbbcf65a330f6cdc7.tar.bz2 linux-stable-3f39894d1b5c253b10fcb8fbbbcf65a330f6cdc7.zip | |
[PATCH] timespec: normalize off by one errors
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<george@mvista.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | include/linux/time.h | 2 | ||||
| -rw-r--r-- | kernel/posix-timers.c | 10 |
2 files changed, 4 insertions, 8 deletions
diff --git a/include/linux/time.h b/include/linux/time.h index 8e83f4e778bb..bfbe92d0767c 100644 --- a/include/linux/time.h +++ b/include/linux/time.h @@ -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; } diff --git a/kernel/posix-timers.c b/kernel/posix-timers.c index ea55c7a1cd75..5870efb3e200 100644 --- a/kernel/posix-timers.c +++ b/kernel/posix-timers.c @@ -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; } |