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| author | Arnd Bergmann <arnd@arndb.de> | 2018-04-27 15:40:15 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2018-05-19 13:57:32 +0200 |
| commit | b9ff604cff1135cc576cf952d394ed9401aa234b (patch) | |
| tree | 2987c08c1e0deb9063d4157a9c51afd0155241de /include | |
| parent | fb7fcc96a86cfaef0f6dcc0665516aa68611e736 (diff) | |
| download | lwn-b9ff604cff1135cc576cf952d394ed9401aa234b.tar.gz lwn-b9ff604cff1135cc576cf952d394ed9401aa234b.zip | |
timekeeping: Add ktime_get_coarse_with_offset
I have run into a couple of drivers using current_kernel_time()
suffering from the y2038 problem, and they could be converted
to using ktime_t, but don't have interfaces that skip the nanosecond
calculation at the moment.
This introduces ktime_get_coarse_with_offset() as a simpler
variant of ktime_get_with_offset(), and adds wrappers for the
three time domains we support with the existing function.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: y2038@lists.linaro.org
Cc: John Stultz <john.stultz@linaro.org>
Link: https://lkml.kernel.org/r/20180427134016.2525989-5-arnd@arndb.de
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/timekeeping.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 3ef9791d7d75..42f71f4b658a 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -51,6 +51,7 @@ enum tk_offsets { extern ktime_t ktime_get(void); extern ktime_t ktime_get_with_offset(enum tk_offsets offs); +extern ktime_t ktime_get_coarse_with_offset(enum tk_offsets offs); extern ktime_t ktime_mono_to_any(ktime_t tmono, enum tk_offsets offs); extern ktime_t ktime_get_raw(void); extern u32 ktime_get_resolution_ns(void); @@ -63,6 +64,11 @@ static inline ktime_t ktime_get_real(void) return ktime_get_with_offset(TK_OFFS_REAL); } +static inline ktime_t ktime_get_coarse_real(void) +{ + return ktime_get_coarse_with_offset(TK_OFFS_REAL); +} + /** * ktime_get_boottime - Returns monotonic time since boot in ktime_t format * @@ -74,6 +80,11 @@ static inline ktime_t ktime_get_boottime(void) return ktime_get_with_offset(TK_OFFS_BOOT); } +static inline ktime_t ktime_get_coarse_boottime(void) +{ + return ktime_get_coarse_with_offset(TK_OFFS_BOOT); +} + /** * ktime_get_clocktai - Returns the TAI time of day in ktime_t format */ @@ -82,6 +93,11 @@ static inline ktime_t ktime_get_clocktai(void) return ktime_get_with_offset(TK_OFFS_TAI); } +static inline ktime_t ktime_get_coarse_clocktai(void) +{ + return ktime_get_coarse_with_offset(TK_OFFS_TAI); +} + /** * ktime_mono_to_real - Convert monotonic time to clock realtime */ |