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 ready for 2038 year.

Signed-off-by: Baolin Wang <[email protected]>
---
 include/linux/time64.h |   25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/include/linux/time64.h b/include/linux/time64.h
index a383147..031b69a 100644
--- a/include/linux/time64.h
+++ b/include/linux/time64.h
@@ -11,11 +11,18 @@ typedef __s64 time64_t;
  */
 #if __BITS_PER_LONG == 64
 # define timespec64 timespec
+#define itimerspec64 itimerspec
 #else
 struct timespec64 {
        time64_t        tv_sec;                 /* seconds */
        long            tv_nsec;                /* nanoseconds */
 };
+
+struct itimerspec64 {
+       struct timespec64 it_interval;  /* timer period */
+       struct timespec64 it_value;     /* timer expiration */
+};
+
 #endif
 
 /* Parameters used to convert the timespec values: */
@@ -187,4 +194,22 @@ static __always_inline void timespec64_add_ns(struct 
timespec64 *a, u64 ns)
 
 #endif
 
+static inline struct itimerspec itimerspec64_to_itimerspec(struct itimerspec64 
*its64)
+{
+       struct itimerspec ret;
+
+       ret.it_interval = timespec64_to_timespec(its64->it_interval);
+       ret.it_value = timespec64_to_timespec(its64->it_value);
+       return ret;
+}
+
+static inline struct itimerspec64 itimerspec_to_itimerspec64(struct itimerspec 
*its)
+{
+       struct itimerspec64 ret;
+
+       ret.it_interval = timespec_to_timespec64(its->it_interval);
+       ret.it_value = timespec_to_timespec64(its->it_value);
+       return ret;
+}
+
 #endif /* _LINUX_TIME64_H */
-- 
1.7.9.5

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