Merge branch 'fortglx/4.3/time' of https://git.linaro.org/people/john.stultz/linux into timers/core

- A handful or y2038 related items
- A walltime to monotonic limit
- Small fixes for timespec_trunc() and timer_list output
This commit is contained in:
Thomas Gleixner 2015-08-20 21:13:22 +02:00
commit 05ddaa4d6d
7 changed files with 102 additions and 33 deletions

View File

@ -416,9 +416,25 @@ static inline unsigned long usecs_to_jiffies(const unsigned int u)
}
}
extern unsigned long timespec_to_jiffies(const struct timespec *value);
extern void jiffies_to_timespec(const unsigned long jiffies,
struct timespec *value);
extern unsigned long timespec64_to_jiffies(const struct timespec64 *value);
extern void jiffies_to_timespec64(const unsigned long jiffies,
struct timespec64 *value);
static inline unsigned long timespec_to_jiffies(const struct timespec *value)
{
struct timespec64 ts = timespec_to_timespec64(*value);
return timespec64_to_jiffies(&ts);
}
static inline void jiffies_to_timespec(const unsigned long jiffies,
struct timespec *value)
{
struct timespec64 ts;
jiffies_to_timespec64(jiffies, &ts);
*value = timespec64_to_timespec(ts);
}
extern unsigned long timeval_to_jiffies(const struct timeval *value);
extern void jiffies_to_timeval(const unsigned long jiffies,
struct timeval *value);

View File

@ -12,11 +12,18 @@ typedef __s64 time64_t;
*/
#if __BITS_PER_LONG == 64
# define timespec64 timespec
#define itimerspec64 itimerspec
#else
struct timespec64 {
time64_t tv_sec; /* seconds */
long tv_nsec; /* nanoseconds */
};
struct itimerspec64 {
struct timespec64 it_interval;
struct timespec64 it_value;
};
#endif
/* Parameters used to convert the timespec values: */
@ -45,6 +52,16 @@ static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
return ts;
}
static inline struct itimerspec itimerspec64_to_itimerspec(struct itimerspec64 *its64)
{
return *its64;
}
static inline struct itimerspec64 itimerspec_to_itimerspec64(struct itimerspec *its)
{
return *its;
}
# define timespec64_equal timespec_equal
# define timespec64_compare timespec_compare
# define set_normalized_timespec64 set_normalized_timespec
@ -77,6 +94,24 @@ static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
return ret;
}
static inline struct itimerspec itimerspec64_to_itimerspec(struct itimerspec64 *its64)
{
struct itimerspec ret;
ret.it_interval = timespec64_to_timespec(its64->it_interval);
ret.it_value = timespec64_to_timespec(its64->it_value);
return ret;
}
static inline struct itimerspec64 itimerspec_to_itimerspec64(struct itimerspec *its)
{
struct itimerspec64 ret;
ret.it_interval = timespec_to_timespec64(its->it_interval);
ret.it_value = timespec_to_timespec64(its->it_value);
return ret;
}
static inline int timespec64_equal(const struct timespec64 *a,
const struct timespec64 *b)
{

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@ -18,10 +18,17 @@ extern int do_sys_settimeofday(const struct timespec *tv,
* Kernel time accessors
*/
unsigned long get_seconds(void);
struct timespec current_kernel_time(void);
struct timespec64 current_kernel_time64(void);
/* does not take xtime_lock */
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
*/

View File

@ -487,6 +487,11 @@ int second_overflow(unsigned long secs)
}
#ifdef CONFIG_GENERIC_CMOS_UPDATE
int __weak update_persistent_clock(struct timespec now)
{
return -ENODEV;
}
int __weak update_persistent_clock64(struct timespec64 now64)
{
struct timespec now;

View File

@ -287,26 +287,20 @@ EXPORT_SYMBOL(jiffies_to_usecs);
* @t: Timespec
* @gran: Granularity in ns.
*
* Truncate a timespec to a granularity. gran must be smaller than a second.
* Always rounds down.
*
* This function should be only used for timestamps returned by
* current_kernel_time() or CURRENT_TIME, not with do_gettimeofday() because
* it doesn't handle the better resolution of the latter.
* Truncate a timespec to a granularity. Always rounds down. gran must
* not be 0 nor greater than a second (NSEC_PER_SEC, or 10^9 ns).
*/
struct timespec timespec_trunc(struct timespec t, unsigned gran)
{
/*
* Division is pretty slow so avoid it for common cases.
* Currently current_kernel_time() never returns better than
* jiffies resolution. Exploit that.
*/
if (gran <= jiffies_to_usecs(1) * 1000) {
/* Avoid division in the common cases 1 ns and 1 s. */
if (gran == 1) {
/* nothing */
} else if (gran == 1000000000) {
} else if (gran == NSEC_PER_SEC) {
t.tv_nsec = 0;
} else {
} else if (gran > 1 && gran < NSEC_PER_SEC) {
t.tv_nsec -= t.tv_nsec % gran;
} else {
WARN(1, "illegal file time granularity: %u", gran);
}
return t;
}
@ -546,7 +540,7 @@ EXPORT_SYMBOL(__usecs_to_jiffies);
* value to a scaled second value.
*/
static unsigned long
__timespec_to_jiffies(unsigned long sec, long nsec)
__timespec64_to_jiffies(u64 sec, long nsec)
{
nsec = nsec + TICK_NSEC - 1;
@ -554,22 +548,27 @@ __timespec_to_jiffies(unsigned long sec, long nsec)
sec = MAX_SEC_IN_JIFFIES;
nsec = 0;
}
return (((u64)sec * SEC_CONVERSION) +
return ((sec * SEC_CONVERSION) +
(((u64)nsec * NSEC_CONVERSION) >>
(NSEC_JIFFIE_SC - SEC_JIFFIE_SC))) >> SEC_JIFFIE_SC;
}
unsigned long
timespec_to_jiffies(const struct timespec *value)
static unsigned long
__timespec_to_jiffies(unsigned long sec, long nsec)
{
return __timespec_to_jiffies(value->tv_sec, value->tv_nsec);
return __timespec64_to_jiffies((u64)sec, nsec);
}
EXPORT_SYMBOL(timespec_to_jiffies);
unsigned long
timespec64_to_jiffies(const struct timespec64 *value)
{
return __timespec64_to_jiffies(value->tv_sec, value->tv_nsec);
}
EXPORT_SYMBOL(timespec64_to_jiffies);
void
jiffies_to_timespec(const unsigned long jiffies, struct timespec *value)
jiffies_to_timespec64(const unsigned long jiffies, struct timespec64 *value)
{
/*
* Convert jiffies to nanoseconds and separate with
@ -580,7 +579,7 @@ jiffies_to_timespec(const unsigned long jiffies, struct timespec *value)
NSEC_PER_SEC, &rem);
value->tv_nsec = rem;
}
EXPORT_SYMBOL(jiffies_to_timespec);
EXPORT_SYMBOL(jiffies_to_timespec64);
/*
* We could use a similar algorithm to timespec_to_jiffies (with a

View File

@ -911,6 +911,7 @@ int do_settimeofday64(const struct timespec64 *ts)
struct timekeeper *tk = &tk_core.timekeeper;
struct timespec64 ts_delta, xt;
unsigned long flags;
int ret = 0;
if (!timespec64_valid_strict(ts))
return -EINVAL;
@ -924,10 +925,15 @@ int do_settimeofday64(const struct timespec64 *ts)
ts_delta.tv_sec = ts->tv_sec - xt.tv_sec;
ts_delta.tv_nsec = ts->tv_nsec - xt.tv_nsec;
if (timespec64_compare(&tk->wall_to_monotonic, &ts_delta) > 0) {
ret = -EINVAL;
goto out;
}
tk_set_wall_to_mono(tk, timespec64_sub(tk->wall_to_monotonic, ts_delta));
tk_set_xtime(tk, ts);
out:
timekeeping_update(tk, TK_CLEAR_NTP | TK_MIRROR | TK_CLOCK_WAS_SET);
write_seqcount_end(&tk_core.seq);
@ -936,7 +942,7 @@ int do_settimeofday64(const struct timespec64 *ts)
/* signal hrtimers about time change */
clock_was_set();
return 0;
return ret;
}
EXPORT_SYMBOL(do_settimeofday64);
@ -965,7 +971,8 @@ int timekeeping_inject_offset(struct timespec *ts)
/* Make sure the proposed value is valid */
tmp = timespec64_add(tk_xtime(tk), ts64);
if (!timespec64_valid_strict(&tmp)) {
if (timespec64_compare(&tk->wall_to_monotonic, &ts64) > 0 ||
!timespec64_valid_strict(&tmp)) {
ret = -EINVAL;
goto error;
}
@ -1874,7 +1881,7 @@ struct timespec __current_kernel_time(void)
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 timespec64 now;
@ -1886,9 +1893,9 @@ struct timespec current_kernel_time(void)
now = tk_xtime(tk);
} 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)
{

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@ -137,7 +137,7 @@ print_base(struct seq_file *m, struct hrtimer_clock_base *base, u64 now)
(unsigned long long) ktime_to_ns(base->offset));
#endif
SEQ_printf(m, "active timers:\n");
print_active_timers(m, base, now);
print_active_timers(m, base, now + ktime_to_ns(base->offset));
}
static void print_cpu(struct seq_file *m, int cpu, u64 now)