[PATCH v4 01/25] linux/time64.h:Introduce the 'struct itimerspec64' for 64bit

[Baolin Wang <baolin.wang@linaro.org>]

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 <baolin.wang@linaro.org>
---
 include/linux/time64.h |   35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)

diff --git a/include/linux/time64.h b/include/linux/time64.h
index a383147..61dc4cb 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: */
@@ -43,6 +50,16 @@ static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
 	return ts;
 }
 
+static inline struct itimerspec itimerspec64_to_itimerspec(struct itimerspec64 *its64)
+{
+	return *its64;
+}
+
+static inline struct itimerspec64 itimerspec_to_itimerspec64(struct itimerspec *its)
+{
+	return *its;
+}
+
 # define timespec64_equal		timespec_equal
 # define timespec64_compare		timespec_compare
 # define set_normalized_timespec64	set_normalized_timespec
@@ -75,6 +92,24 @@ static inline struct timespec64 timespec_to_timespec64(const struct timespec ts)
 	return ret;
 }
 
+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;
+}
+
 static inline int timespec64_equal(const struct timespec64 *a,
 				   const struct timespec64 *b)
 {
-- 
1.7.9.5