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time: Move time_t conversion helpers to time32.h

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On 64-bit architectures, the timespec64 based helpers in linux/time.h
are defined as macros pointing to their timespec based counterparts.
This made sense when they were first introduced, but as we are migrating
away from timespec in general, it's much less intuitive now.

This changes the macros to work in the exact opposite way: we always
provide the timespec64 based helpers and define the old interfaces as
macros for them. Now we can move those macros into linux/time32.h, which
already contains the respective helpers for 32-bit architectures.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Miroslav Lichvar <mlichvar@redhat.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Stephen Boyd <stephen.boyd@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
Arnd Bergmann
2017-10-19 13:14:48 +02:00
committed by John Stultz
parent 5dbf20127f
commit abc8f96e3e
3 changed files with 49 additions and 51 deletions
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45
include/linux/time32.h
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@@ -13,6 +13,49 @@
#define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
#if __BITS_PER_LONG == 64
/* timespec64 is defined as timespec here */
static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64)
{
return ts64;
}
static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
{
return ts;
}
# define timespec_equal timespec64_equal
# define timespec_compare timespec64_compare
# define set_normalized_timespec set_normalized_timespec64
# define timespec_add timespec64_add
# define timespec_sub timespec64_sub
# define timespec_valid timespec64_valid
# define timespec_valid_strict timespec64_valid_strict
# define timespec_to_ns timespec64_to_ns
# define ns_to_timespec ns_to_timespec64
# define timespec_add_ns timespec64_add_ns
#else
static inline struct timespec timespec64_to_timespec(const struct timespec64 ts64)
{
struct timespec ret;
ret.tv_sec = (time_t)ts64.tv_sec;
ret.tv_nsec = ts64.tv_nsec;
return ret;
}
static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
{
struct timespec64 ret;
ret.tv_sec = ts.tv_sec;
ret.tv_nsec = ts.tv_nsec;
return ret;
}
static inline int timespec_equal(const struct timespec *a,
const struct timespec *b)
{
@@ -116,6 +159,8 @@ static __always_inline void timespec_add_ns(struct timespec *a, u64 ns)
a->tv_nsec = ns;
}
#endif
/**
* time_to_tm - converts the calendar time to local broken-down time
*