iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[PATCH] timespec: normalize off by one errors

Browse Source 
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>
This commit is contained in:
George Anzinger 2005-11-13 16:07:44 -08:00 committed by Linus Torvalds
parent 09e12f9f6b
commit 3f39894d1b
2 changed files with 4 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/time.h
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;
}

10
kernel/posix-timers.c
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;
}