1 files changed, 32 insertions, 7 deletions

diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index 1622d23a8dc3..daa4940cc0f1 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -12,11 +12,13 @@
 #include <linux/timex.h>
 #include <linux/time.h>
 #include <linux/list.h>
+#include <linux/timer.h>
 #include <asm/div64.h>
 #include <asm/io.h>
 
 /* clocksource cycle base type */
 typedef u64 cycle_t;
+struct clocksource;
 
 /**
  * struct clocksource - hardware abstraction for a free running counter
@@ -44,8 +46,8 @@ typedef u64 cycle_t;
  *                      subtraction of non 64 bit counters
  * @mult:               cycle to nanosecond multiplier
  * @shift:              cycle to nanosecond divisor (power of two)
- * @update_callback:    called when safe to alter clocksource values
- * @is_continuous:      defines if clocksource is free-running.
+ * @flags:              flags describing special properties
+ * @vread:              vsyscall based read
  * @cycle_interval:     Used internally by timekeeping core, please ignore.
  * @xtime_interval:     Used internally by timekeeping core, please ignore.
  */
@@ -57,15 +59,30 @@ struct clocksource {
         cycle_t mask;
         u32 mult;
         u32 shift;
-        int (*update_callback)(void);
-        int is_continuous;
+        unsigned long flags;
+        cycle_t (*vread)(void);
 
         /* timekeeping specific data, ignore */
         cycle_t cycle_last, cycle_interval;
         u64 xtime_nsec, xtime_interval;
         s64 error;
+
+#ifdef CONFIG_CLOCKSOURCE_WATCHDOG
+        /* Watchdog related data, used by the framework */
+        struct list_head wd_list;
+        cycle_t wd_last;
+#endif
 };
 
+/*
+ * Clock source flags bits::
+ */
+#define CLOCK_SOURCE_IS_CONTINUOUS              0x01
+#define CLOCK_SOURCE_MUST_VERIFY                0x02
+
+#define CLOCK_SOURCE_WATCHDOG                   0x10
+#define CLOCK_SOURCE_VALID_FOR_HRES             0x20
+
 /* simplify initialization of mask field */
 #define CLOCKSOURCE_MASK(bits) (cycle_t)(bits<64 ? ((1ULL<<bits)-1) : -1)
 
@@ -178,8 +195,16 @@ static inline void clocksource_calculate_interval(struct clocksource *c,
 
 
 /* used to install a new clocksource */
-int clocksource_register(struct clocksource*);
-void clocksource_reselect(void);
-struct clocksource* clocksource_get_next(void);
+extern int clocksource_register(struct clocksource*);
+extern struct clocksource* clocksource_get_next(void);
+extern void clocksource_change_rating(struct clocksource *cs, int rating);
+
+#ifdef CONFIG_GENERIC_TIME_VSYSCALL
+extern void update_vsyscall(struct timespec *ts, struct clocksource *c);
+#else
+static inline void update_vsyscall(struct timespec *ts, struct clocksource *c)
+{
+}
+#endif
 
 #endif /* _LINUX_CLOCKSOURCE_H */