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time: Introduce current_kernel_time64()

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The current_kernel_time() is not year 2038 safe on 32bit systems
since it returns a timespec value. Introduce current_kernel_time64()
which returns a timespec64 value.

Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
Baolin Wang 2015-07-29 20:09:43 +08:00 committed by John Stultz
parent 19a46fe57a
commit 8758a240e2
2 changed files with 11 additions and 4 deletions
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9
include/linux/timekeeping.h
View File

@ -18,10 +18,17 @@ extern int do_sys_settimeofday(const struct timespec *tv,
* Kernel time accessors * Kernel time accessors
*/ */
unsigned long get_seconds(void); unsigned long get_seconds(void);
struct timespec current_kernel_time(void); struct timespec64 current_kernel_time64(void);
/* does not take xtime_lock */ /* does not take xtime_lock */
struct timespec __current_kernel_time(void); struct timespec __current_kernel_time(void);
static inline struct timespec current_kernel_time(void)
{
struct timespec64 now = current_kernel_time64();
return timespec64_to_timespec(now);
}
/* /*
* timespec based interfaces * timespec based interfaces
*/ */

6
kernel/time/timekeeping.c
View File

@ -1881,7 +1881,7 @@ struct timespec __current_kernel_time(void)
return timespec64_to_timespec(tk_xtime(tk)); return timespec64_to_timespec(tk_xtime(tk));
} }
struct timespec current_kernel_time(void) struct timespec64 current_kernel_time64(void)
{ {
struct timekeeper *tk = &tk_core.timekeeper; struct timekeeper *tk = &tk_core.timekeeper;
struct timespec64 now; struct timespec64 now;
@ -1893,9 +1893,9 @@ struct timespec current_kernel_time(void)
now = tk_xtime(tk); now = tk_xtime(tk);
} while (read_seqcount_retry(&tk_core.seq, seq)); } while (read_seqcount_retry(&tk_core.seq, seq));
return timespec64_to_timespec(now); return now;
} }
EXPORT_SYMBOL(current_kernel_time); EXPORT_SYMBOL(current_kernel_time64);
struct timespec64 get_monotonic_coarse64(void) struct timespec64 get_monotonic_coarse64(void)
{ {