3 files changed, 25 insertions, 0 deletions

diff --git a/include/linux/time32.h b/include/linux/time32.h
index 65b1de25198d..d2bcd4377b56 100644
--- a/include/linux/time32.h
+++ b/include/linux/time32.h
@@ -217,5 +217,6 @@ static inline s64 timeval_to_ns(const struct timeval *tv)
  * Returns the timeval representation of the nsec parameter.
  */
 extern struct timeval ns_to_timeval(const s64 nsec);
+extern struct __kernel_old_timeval ns_to_kernel_old_timeval(s64 nsec);
 
 #endif
diff --git a/include/uapi/linux/time.h b/include/uapi/linux/time.h
index 61a187df8da2..16a296612ba4 100644
--- a/include/uapi/linux/time.h
+++ b/include/uapi/linux/time.h
@@ -43,6 +43,18 @@ struct itimerval {
 };
 
 /*
+ * legacy timeval structure, only embedded in structures that
+ * traditionally used 'timeval' to pass time intervals (not absolute
+ * times). Do not add new users. If user space fails to compile
+ * here, this is probably because it is not y2038 safe and needs to
+ * be changed to use another interface.
+ */
+struct __kernel_old_timeval {
+        __kernel_long_t tv_sec;
+        __kernel_long_t tv_usec;
+};
+
+/*
  * The IDs of the various system clocks (for POSIX.1b interval timers):
  */
 #define CLOCK_REALTIME                  0
diff --git a/kernel/time/time.c b/kernel/time/time.c
index bd4e6c7dd689..3044d48ebe56 100644
--- a/kernel/time/time.c
+++ b/kernel/time/time.c
@@ -488,6 +488,18 @@ struct timeval ns_to_timeval(const s64 nsec)
 }
 EXPORT_SYMBOL(ns_to_timeval);
 
+struct __kernel_old_timeval ns_to_kernel_old_timeval(const s64 nsec)
+{
+        struct timespec64 ts = ns_to_timespec64(nsec);
+        struct __kernel_old_timeval tv;
+
+        tv.tv_sec = ts.tv_sec;
+        tv.tv_usec = (suseconds_t)ts.tv_nsec / 1000;
+
+        return tv;
+}
+EXPORT_SYMBOL(ns_to_kernel_old_timeval);
+
 /**
  * set_normalized_timespec - set timespec sec and nsec parts and normalize
  *