This patch introduces the 'struct itimerspec64' for 64bit to replace itimerspec,
and also introduces the conversion methods: itimerspec64_to_itimerspec() and
itimerspec_to_itimerspec64(), that makes itimerspec to ready for 2038 year.

Signed-off-by: Baolin Wang <redacted>
---
 include/linux/time64.h |   13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/include/linux/time64.h b/include/linux/time64.h
index a383147..3647bdd 100644
--- a/include/linux/time64.h
+++ b/include/linux/time64.h

@@ -18,6 +18,11 @@ struct timespec64 {
 };
 #endif
 
+struct itimerspec64 {
+	struct timespec64 it_interval;  /* timer period */
+	struct timespec64 it_value;     /* timer expiration */
+};
+
 /* Parameters used to convert the timespec values: */
 #define MSEC_PER_SEC	1000L
 #define USEC_PER_MSEC	1000L

@@ -187,4 +192,12 @@ static __always_inline void timespec64_add_ns(struct timespec64 *a, u64 ns)
 
 #endif
 
+#define itimerspec64_to_itimerspec(its64) \