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Diffstat (limited to 'include/linux/time.h')
-rw-r--r--include/linux/time.h21
1 files changed, 18 insertions, 3 deletions
diff --git a/include/linux/time.h b/include/linux/time.h
index ea3559f0b3f2..cb34e35fabac 100644
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -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())