diff options
Diffstat (limited to 'include/linux/time.h')
| -rw-r--r-- | include/linux/time.h | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/include/linux/time.h b/include/linux/time.h index ea3559f0b3f2..9f15ac7ab92a 100644 --- a/include/linux/time.h +++ b/include/linux/time.h @@ -38,7 +38,7 @@ extern struct timezone sys_tz; #define NSEC_PER_MSEC 1000000L #define USEC_PER_SEC 1000000L #define NSEC_PER_SEC 1000000000L -#define FSEC_PER_SEC 1000000000000000L +#define FSEC_PER_SEC 1000000000000000LL #define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1) @@ -76,9 +76,25 @@ extern unsigned long mktime(const unsigned int year, const unsigned int mon, const unsigned int min, const unsigned int sec); extern void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec); + +/* + * timespec_add_safe assumes both values are positive and checks + * for overflow. It will return TIME_T_MAX if the reutrn would be + * smaller then either of the arguments. + */ extern struct timespec timespec_add_safe(const struct timespec lhs, const struct timespec rhs); + +static inline struct timespec timespec_add(struct timespec lhs, + struct timespec rhs) +{ + struct timespec ts_delta; + set_normalized_timespec(&ts_delta, lhs.tv_sec + rhs.tv_sec, + lhs.tv_nsec + rhs.tv_nsec); + return ts_delta; +} + /* * sub = lhs - rhs, in normalized form */ @@ -97,8 +113,6 @@ static inline struct timespec timespec_sub(struct timespec lhs, #define timespec_valid(ts) \ (((ts)->tv_sec >= 0) && (((unsigned long) (ts)->tv_nsec) < NSEC_PER_SEC)) -extern struct timespec xtime; -extern struct timespec wall_to_monotonic; extern seqlock_t xtime_lock; extern void read_persistent_clock(struct timespec *ts); @@ -110,7 +124,8 @@ extern int timekeeping_suspended; unsigned long get_seconds(void); struct timespec current_kernel_time(void); -struct timespec __current_kernel_time(void); /* does not hold xtime_lock */ +struct timespec __current_kernel_time(void); /* does not take xtime_lock */ +struct timespec __get_wall_to_monotonic(void); /* does not take xtime_lock */ struct timespec get_monotonic_coarse(void); #define CURRENT_TIME (current_kernel_time()) @@ -135,7 +150,7 @@ extern void do_gettimeofday(struct timeval *tv); extern int do_settimeofday(struct timespec *tv); extern int do_sys_settimeofday(struct timespec *tv, struct timezone *tz); #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts) -extern long do_utimes(int dfd, char __user *filename, struct timespec *times, int flags); +extern long do_utimes(int dfd, const char __user *filename, struct timespec *times, int flags); struct itimerval; extern int do_setitimer(int which, struct itimerval *value, struct itimerval *ovalue); |