[PATCH 1/4] timens: additional helper function to add boottime in nsec

[Michael Weiß]

Provide a helper function to apply the boottime offset to u64 types
in nanoseconds.

Signed-off-by: Michael Weiß <michael.weiss@xxxxxxxxxxxxxxxxxxx>
---
 include/linux/time_namespace.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/linux/time_namespace.h b/include/linux/time_namespace.h
index 5b6031385db0..db02ec7dae8a 100644
--- a/include/linux/time_namespace.h
+++ b/include/linux/time_namespace.h
@@ -77,6 +77,13 @@ static inline void timens_add_boottime(struct timespec64 *ts)
 	*ts = timespec64_add(*ts, ns_offsets->boottime);
 }
 
+static inline u64 timens_add_boottime_ns(u64 nsec)
+{
+	struct timens_offsets *ns_offsets = &current->nsproxy->time_ns->offsets;
+
+	return nsec + timespec64_to_ns(&ns_offsets->boottime);
+}
+
 ktime_t do_timens_ktime_to_host(clockid_t clockid, ktime_t tim,
 				struct timens_offsets *offsets);
 
-- 
2.20.1