include/linux/pvclock_gtod.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _PVCLOCK_GTOD_H
   3 #define _PVCLOCK_GTOD_H
   4
   5 #include <linux/notifier.h>
   6
   7 /*
   8  * The pvclock gtod notifier is called when the system time is updated
   9  * and is used to keep guest time synchronized with host time.
  10  *
  11  * The 'action' parameter in the notifier function is false (0), or
  12  * true (non-zero) if system time was stepped.
  13  */
  14 extern int pvclock_gtod_register_notifier(struct notifier_block *nb);
  15 extern int pvclock_gtod_unregister_notifier(struct notifier_block *nb);
  16
  17 #endif /* _PVCLOCK_GTOD_H */