diff options
| author | Ajay Nandakumar <anandakumarm@nvidia.com> | 2013-01-29 17:16:47 +0530 |
|---|---|---|
| committer | Riham Haidar <rhaidar@nvidia.com> | 2013-01-30 15:17:04 -0800 |
| commit | 0179fea9f318b960660c3a2fecdf29fefe7c13e8 (patch) | |
| tree | 08086aa6a68ba3327111efeea989655c120edf07 /kernel | |
| parent | 9852cf7ca98bf62abb1d5c1070f482c598a15a5b (diff) | |
timekeeping: Fix time moving backwards
Changed the calculation logic that sometimes calculates
the time wrong.
Sometimes there is an overflow when the tv_nsec field in
the timespec structure is being added since it is 32-bit.
To resolve this issue nsec variable is being added first
so that the addition is performed in 64 bit signed format.
Bug 1217429
Change-Id: I9c65da88f02596ba73c47be6342ed909e650db22
Signed-off-by: Ajay Nandakumar <anandakumarm@nvidia.com>
Reviewed-on: http://git-master/r/195092
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Prashant Gaikwad <pgaikwad@nvidia.com>
Reviewed-by: Shridhar Rasal <srasal@nvidia.com>
Reviewed-by: Bo Yan <byan@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Tested-by: Shridhar Rasal <srasal@nvidia.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/time/timekeeping.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index f3a4dd993ca0..da680a659f72 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -1168,7 +1168,7 @@ void get_monotonic_boottime(struct timespec *ts) } while (read_seqretry(&timekeeper.lock, seq)); set_normalized_timespec(ts, ts->tv_sec + tomono.tv_sec + sleep.tv_sec, - ts->tv_nsec + tomono.tv_nsec + sleep.tv_nsec + nsecs); + nsecs + ts->tv_nsec + tomono.tv_nsec + sleep.tv_nsec); } EXPORT_SYMBOL_GPL(get_monotonic_boottime); |