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| author | John Stultz <john.stultz@linaro.org> | 2014-07-16 21:03:53 +0000 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2014-07-23 10:16:50 -0700 |
| commit | 24e4a8c3e8868874835b0f1ad6dd417341e99822 (patch) | |
| tree | d71c666cc53db7e0d906e838f23ff67855b86b6b /kernel/time/Kconfig | |
| parent | 76f4108892d9a9e3408bba839914f97a54086a6f (diff) | |
| download | linux-24e4a8c3e8868874835b0f1ad6dd417341e99822.tar.bz2 | |
ktime: Kill non-scalar ktime_t implementation for 2038
The non-scalar ktime_t implementation is basically a timespec
which has to be changed to support dates past 2038 on 32bit
systems.
This patch removes the non-scalar ktime_t implementation, forcing
the scalar s64 nanosecond version on all architectures.
This may have additional performance overhead on some 32bit
systems when converting between ktime_t and timespec structures,
however the majority of 32bit systems (arm and i386) were already
using scalar ktime_t, so no performance regressions will be seen
on those platforms.
On affected platforms, I'm open to finding optimizations, including
avoiding converting to timespecs where possible.
[ tglx: We can now cleanup the ktime_t.tv64 mess, but thats a
different issue and we can throw a coccinelle script at it ]
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Diffstat (limited to 'kernel/time/Kconfig')
| -rw-r--r-- | kernel/time/Kconfig | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig index f448513a45ed..feccfd888732 100644 --- a/kernel/time/Kconfig +++ b/kernel/time/Kconfig @@ -20,10 +20,6 @@ config GENERIC_TIME_VSYSCALL config GENERIC_TIME_VSYSCALL_OLD bool -# ktime_t scalar 64bit nsec representation -config KTIME_SCALAR - bool - # Old style timekeeping config ARCH_USES_GETTIMEOFFSET bool |