diff options
| author | Thomas Graziadei <thomas.graziadei@omicronenergy.com> | 2016-05-31 15:06:06 +0200 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2016-06-20 12:46:45 -0700 |
| commit | 0209b937569a133dedfe930cdfff3a0d1d68c9e9 (patch) | |
| tree | a35461164f667e343c98731f7f781d3e0b422890 /Documentation/accounting | |
| parent | 0fb71d340d355156818bb53eb36ae79a3f88bda9 (diff) | |
timekeeping: Fix 1ns/tick drift with GENERIC_TIME_VSYSCALL_OLD
The user notices the problem in a raw and real time drift, calling
clock_gettime with CLOCK_REALTIME / CLOCK_MONOTONIC_RAW on a system
with no ntp correction taking place (no ntpd or ptp stuff running).
The problem is, that old_vsyscall_fixup adds an extra 1ns even though
xtime_nsec is already held in full nsecs and the remainder in this
case is 0. Do the rounding up buisness only if needed.
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Thomas Graziadei <thomas.graziadei@omicronenergy.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'Documentation/accounting')
0 files changed, 0 insertions, 0 deletions