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| author | Heena Sirwani <heenasirwani@gmail.com> | 2014-10-29 11:31:50 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2014-10-29 15:15:40 +0100 |
| commit | dbe7aa622db96b5cd601f59d09c4f00b98b76079 (patch) | |
| tree | 303b3f8f88b40b4529f3a37ea20ca8f4f46694e5 /include | |
| parent | timekeeping: Provide fast accessor to the seconds part of CLOCK_MONOTONIC (diff) | |
| download | linux-dbe7aa622db96b5cd601f59d09c4f00b98b76079.tar.xz linux-dbe7aa622db96b5cd601f59d09c4f00b98b76079.zip | |
timekeeping: Provide y2038 safe accessor to the seconds portion of CLOCK_REALTIME
ktime_get_real_seconds() is the replacement function for get_seconds()
returning the seconds portion of CLOCK_REALTIME in a time64_t. For
64bit the function is equivivalent to get_seconds(), but for 32bit it
protects the readout with the timekeeper sequence count. This is
required because 32-bit machines cannot access 64-bit tk->xtime_sec
variable atomically.
[tglx: Massaged changelog and added docbook comment ]
Signed-off-by: Heena Sirwani <heenasirwani@gmail.com>
Reviewed-by: Arnd Bergman <arnd@arndb.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: opw-kernel@googlegroups.com
Link: http://lkml.kernel.org/r/7adcfaa8962b8ad58785d9a2456c3f77d93c0ffb.1414578445.git.heenasirwani@gmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/timekeeping.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/timekeeping.h b/include/linux/timekeeping.h index 115d55e11bc9..91454dea2bc6 100644 --- a/include/linux/timekeeping.h +++ b/include/linux/timekeeping.h @@ -29,6 +29,7 @@ struct timespec get_monotonic_coarse(void); extern void getrawmonotonic(struct timespec *ts); extern void ktime_get_ts64(struct timespec64 *ts); extern time64_t ktime_get_seconds(void); +extern time64_t ktime_get_real_seconds(void); extern int __getnstimeofday64(struct timespec64 *tv); extern void getnstimeofday64(struct timespec64 *tv); |