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timekeeping: Provide timespec64 based interfaces 

To convert callers of the core code to timespec64 we need to provide
the proper interfaces.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: John Stultz <john.stultz@linaro.org>
This commit is contained in:
Thomas Gleixner 2014-07-16 21:04:04 +00:00 committed by John Stultz
parent 8b094cd03b
commit d6d29896c6
3 changed files with 87 additions and 33 deletions
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66
include/linux/timekeeping.h
View File

@ -29,15 +29,71 @@ struct timespec get_monotonic_coarse(void);
extern void getrawmonotonic(struct timespec *ts);
extern void monotonic_to_bootbased(struct timespec *ts);
extern void get_monotonic_boottime(struct timespec *ts);
extern void ktime_get_ts(struct timespec *ts);
extern void ktime_get_ts64(struct timespec64 *ts);
extern int __getnstimeofday64(struct timespec64 *tv);
extern void getnstimeofday64(struct timespec64 *tv);
#if BITS_PER_LONG == 64
static inline int __getnstimeofday(struct timespec *ts)
{
return __getnstimeofday64(ts);
}
static inline void getnstimeofday(struct timespec *ts)
{
getnstimeofday64(ts);
}
static inline void ktime_get_ts(struct timespec *ts)
{
ktime_get_ts64(ts);
}
static inline void ktime_get_real_ts(struct timespec *ts)
{
getnstimeofday64(ts);
}
#else
static inline int __getnstimeofday(struct timespec *ts)
{
struct timespec64 ts64;
int ret = __getnstimeofday64(&ts64);
*ts = timespec64_to_timespec(ts64);
return ret;
}
static inline void getnstimeofday(struct timespec *ts)
{
struct timespec64 ts64;
getnstimeofday64(&ts64);
*ts = timespec64_to_timespec(ts64);
}
static inline void ktime_get_ts(struct timespec *ts)
{
struct timespec64 ts64;
ktime_get_ts64(&ts64);
*ts = timespec64_to_timespec(ts64);
}
static inline void ktime_get_real_ts(struct timespec *ts)
{
struct timespec64 ts64;
getnstimeofday64(&ts64);
*ts = timespec64_to_timespec(ts64);
}
#endif
extern int __getnstimeofday(struct timespec *tv);
extern void getnstimeofday(struct timespec *tv);
extern void getboottime(struct timespec *ts);
#define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
#define ktime_get_real_ts(ts) getnstimeofday(ts)
#define ktime_get_real_ts64(ts) getnstimeofday64(ts)
/*
* ktime_t based interfaces

7
kernel/time/ntp.c
View File

@ -466,7 +466,8 @@ static DECLARE_DELAYED_WORK(sync_cmos_work, sync_cmos_clock);
static void sync_cmos_clock(struct work_struct *work)
{
struct timespec now, next;
struct timespec64 now;
struct timespec next;
int fail = 1;
/*
@ -485,9 +486,9 @@ static void sync_cmos_clock(struct work_struct *work)
return;
}
getnstimeofday(&now);
getnstimeofday64(&now);
if (abs(now.tv_nsec - (NSEC_PER_SEC / 2)) <= tick_nsec * 5) {
struct timespec adjust = now;
struct timespec adjust = timespec64_to_timespec(now);
fail = -ENODEV;
if (persistent_clock_is_local)

47
kernel/time/timekeeping.c
View File

@ -285,13 +285,13 @@ static void timekeeping_forward_now(struct timekeeper *tk)
}
/**
* __getnstimeofday - Returns the time of day in a timespec.
* __getnstimeofday64 - Returns the time of day in a timespec64.
* @ts: pointer to the timespec to be set
*
* Updates the time of day in the timespec.
* Returns 0 on success, or -ve when suspended (timespec will be undefined).
*/
int __getnstimeofday(struct timespec *ts)
int __getnstimeofday64(struct timespec64 *ts)
{
struct timekeeper *tk = &timekeeper;
unsigned long seq;
@ -306,7 +306,7 @@ int __getnstimeofday(struct timespec *ts)
} while (read_seqcount_retry(&timekeeper_seq, seq));
ts->tv_nsec = 0;
timespec_add_ns(ts, nsecs);
timespec64_add_ns(ts, nsecs);
/*
* Do not bail out early, in case there were callers still using
@ -316,19 +316,19 @@ int __getnstimeofday(struct timespec *ts)
return -EAGAIN;
return 0;
}
EXPORT_SYMBOL(__getnstimeofday);
EXPORT_SYMBOL(__getnstimeofday64);
/**
* getnstimeofday - Returns the time of day in a timespec.
* getnstimeofday64 - Returns the time of day in a timespec64.
* @ts: pointer to the timespec to be set
*
* Returns the time of day in a timespec (WARN if suspended).
*/
void getnstimeofday(struct timespec *ts)
void getnstimeofday64(struct timespec64 *ts)
{
WARN_ON(__getnstimeofday(ts));
WARN_ON(__getnstimeofday64(ts));
}
EXPORT_SYMBOL(getnstimeofday);
EXPORT_SYMBOL(getnstimeofday64);
ktime_t ktime_get(void)
{
@ -350,17 +350,17 @@ ktime_t ktime_get(void)
EXPORT_SYMBOL_GPL(ktime_get);
/**
* ktime_get_ts - get the monotonic clock in timespec format
* ktime_get_ts64 - get the monotonic clock in timespec64 format
* @ts: pointer to timespec variable
*
* The function calculates the monotonic clock from the realtime
* clock and the wall_to_monotonic offset and stores the result
* in normalized timespec format in the variable pointed to by @ts.
*/
void ktime_get_ts(struct timespec *ts)
void ktime_get_ts64(struct timespec64 *ts)
{
struct timekeeper *tk = &timekeeper;
struct timespec64 ts64, tomono;
struct timespec64 tomono;
s64 nsec;
unsigned int seq;
@ -368,18 +368,17 @@ void ktime_get_ts(struct timespec *ts)
do {
seq = read_seqcount_begin(&timekeeper_seq);
ts64.tv_sec = tk->xtime_sec;
ts->tv_sec = tk->xtime_sec;
nsec = timekeeping_get_ns(tk);
tomono = tk->wall_to_monotonic;
} while (read_seqcount_retry(&timekeeper_seq, seq));
ts64.tv_sec += tomono.tv_sec;
ts64.tv_nsec = 0;
timespec64_add_ns(&ts64, nsec + tomono.tv_nsec);
*ts = timespec64_to_timespec(ts64);
ts->tv_sec += tomono.tv_sec;
ts->tv_nsec = 0;
timespec64_add_ns(ts, nsec + tomono.tv_nsec);
}
EXPORT_SYMBOL_GPL(ktime_get_ts);
EXPORT_SYMBOL_GPL(ktime_get_ts64);
/**
@ -473,9 +472,9 @@ EXPORT_SYMBOL(getnstime_raw_and_real);
*/
void do_gettimeofday(struct timeval *tv)
{
struct timespec now;
struct timespec64 now;
getnstimeofday(&now);
getnstimeofday64(&now);
tv->tv_sec = now.tv_sec;
tv->tv_usec = now.tv_nsec/1000;
}
@ -680,11 +679,11 @@ int timekeeping_notify(struct clocksource *clock)
*/
ktime_t ktime_get_real(void)
{
struct timespec now;
struct timespec64 now;
getnstimeofday(&now);
getnstimeofday64(&now);
return timespec_to_ktime(now);
return timespec64_to_ktime(now);
}
EXPORT_SYMBOL_GPL(ktime_get_real);
@ -1689,7 +1688,6 @@ int do_adjtimex(struct timex *txc)
struct timekeeper *tk = &timekeeper;
unsigned long flags;
struct timespec64 ts;
struct timespec tmp;
s32 orig_tai, tai;
int ret;
@ -1709,8 +1707,7 @@ int do_adjtimex(struct timex *txc)
return ret;
}
getnstimeofday(&tmp);
ts = timespec_to_timespec64(tmp);
getnstimeofday64(&ts);
raw_spin_lock_irqsave(&timekeeper_lock, flags);
write_seqcount_begin(&timekeeper_seq);