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| author | Hector Palacios <hector.palacios@digi.com> | 2011-11-14 11:15:25 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-12-09 09:21:38 -0800 |
| commit | 5c3e9f55bbd366af73e51a12e1aa797a29532d67 (patch) | |
| tree | f11a6549bc3da9a8c0d0225552f4aaf0da9edfc3 | |
| parent | 5b28da531873ddafa70ab7d9ef7845991270af15 (diff) | |
| download | lwn-5c3e9f55bbd366af73e51a12e1aa797a29532d67.tar.gz lwn-5c3e9f55bbd366af73e51a12e1aa797a29532d67.zip | |
timekeeping: add arch_offset hook to ktime_get functions
commit d004e024058a0eaca097513ce62cbcf978913e0a upstream.
ktime_get and ktime_get_ts were calling timekeeping_get_ns()
but later they were not calling arch_gettimeoffset() so architectures
using this mechanism returned 0 ns when calling these functions.
This happened for example when running Busybox's ping which calls
syscall(__NR_clock_gettime, CLOCK_MONOTONIC, ts) which eventually
calls ktime_get. As a result the returned ping travel time was zero.
Signed-off-by: Hector Palacios <hector.palacios@digi.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | kernel/time/timekeeping.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c index 1d1206a8f873..4a71cfffd38d 100644 --- a/kernel/time/timekeeping.c +++ b/kernel/time/timekeeping.c @@ -264,6 +264,8 @@ ktime_t ktime_get(void) secs = xtime.tv_sec + wall_to_monotonic.tv_sec; nsecs = xtime.tv_nsec + wall_to_monotonic.tv_nsec; nsecs += timekeeping_get_ns(); + /* If arch requires, add in gettimeoffset() */ + nsecs += arch_gettimeoffset(); } while (read_seqretry(&xtime_lock, seq)); /* @@ -295,6 +297,8 @@ void ktime_get_ts(struct timespec *ts) *ts = xtime; tomono = wall_to_monotonic; nsecs = timekeeping_get_ns(); + /* If arch requires, add in gettimeoffset() */ + nsecs += arch_gettimeoffset(); } while (read_seqretry(&xtime_lock, seq)); |