nohz: Prevent clocksource wrapping during idle

[deliverable/linux.git] / include / linux / time.h

diff --git a/include/linux/time.h b/include/linux/time.h
index 56787c0933456c560bc98e860da4a989e8437f18..6e026e45a179e2c66b347eb3834501a13be7ee2e 100644 (file)
--- a/include/linux/time.h
+++ b/include/linux/time.h
@@ -148,6 +148,7 @@ extern void monotonic_to_bootbased(struct timespec *ts);
 
 extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
 extern int timekeeping_valid_for_hres(void);
+extern u64 timekeeping_max_deferment(void);
 extern void update_wall_time(void);
 extern void update_xtime_cache(u64 nsec);
 extern void timekeeping_leap_insert(int leapsecond);
@@ -155,6 +156,34 @@ extern void timekeeping_leap_insert(int leapsecond);
 struct tms;
 extern void do_sys_times(struct tms *);
 
+/*
+ * Similar to the struct tm in userspace <time.h>, but it needs to be here so
+ * that the kernel source is self contained.
+ */
+struct tm {
+       /*
+        * the number of seconds after the minute, normally in the range
+        * 0 to 59, but can be up to 60 to allow for leap seconds
+        */
+       int tm_sec;
+       /* the number of minutes after the hour, in the range 0 to 59*/
+       int tm_min;
+       /* the number of hours past midnight, in the range 0 to 23 */
+       int tm_hour;
+       /* the day of the month, in the range 1 to 31 */
+       int tm_mday;
+       /* the number of months since January, in the range 0 to 11 */
+       int tm_mon;
+       /* the number of years since 1900 */
+       long tm_year;
+       /* the number of days since Sunday, in the range 0 to 6 */
+       int tm_wday;
+       /* the number of days since January 1, in the range 0 to 365 */
+       int tm_yday;
+};
+
+void time_to_tm(time_t totalsecs, int offset, struct tm *result);
+
 /**
  * timespec_to_ns - Convert timespec to nanoseconds
  * @ts:                pointer to the timespec variable to be converted