summary refs log tree commit diff
path: root/kernel/time/timekeeping_internal.h
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/time/timekeeping_internal.h')
-rw-r--r--kernel/time/timekeeping_internal.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/kernel/time/timekeeping_internal.h b/kernel/time/timekeeping_internal.h
index e3d28ad236f9..05dfa6b25dc4 100644
--- a/kernel/time/timekeeping_internal.h
+++ b/kernel/time/timekeeping_internal.h
@@ -3,6 +3,7 @@
 /*
  * timekeeping debug functions
  */
+#include <linux/clocksource.h>
 #include <linux/time.h>
 
 #ifdef CONFIG_DEBUG_FS
@@ -11,4 +12,9 @@ extern void tk_debug_account_sleep_time(struct timespec64 *t);
 #define tk_debug_account_sleep_time(x)
 #endif
 
+static inline cycle_t clocksource_delta(cycle_t now, cycle_t last, cycle_t mask)
+{
+	return (now - last) & mask;
+}
+
 #endif /* _TIMEKEEPING_INTERNAL_H */