diff options
Diffstat (limited to 'include/linux/pvclock_gtod.h')
| -rw-r--r-- | include/linux/pvclock_gtod.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/include/linux/pvclock_gtod.h b/include/linux/pvclock_gtod.h new file mode 100644 index 000000000..f63549581 --- /dev/null +++ b/include/linux/pvclock_gtod.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _PVCLOCK_GTOD_H +#define _PVCLOCK_GTOD_H + +#include <linux/notifier.h> + +/* + * The pvclock gtod notifier is called when the system time is updated + * and is used to keep guest time synchronized with host time. + * + * The 'action' parameter in the notifier function is false (0), or + * true (non-zero) if system time was stepped. + */ +extern int pvclock_gtod_register_notifier(struct notifier_block *nb); +extern int pvclock_gtod_unregister_notifier(struct notifier_block *nb); + +#endif /* _PVCLOCK_GTOD_H */ |