X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Flinux%2Fktime.h;h=bbca12804d12434ebfb100487c460c2ed21f99ed;hb=b245ea6eb59b8b15932527e6009dc8115eb9c1b3;hp=e83512f63df550a64cba3fb74c51c5c3b5dc9030;hpb=45acc86b2e47e255c4a6194dd69248a1bce71e48;p=firefly-linux-kernel-4.4.55.git

diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index e83512f63df5..bbca12804d12 100644
--- a/include/linux/ktime.h
+++ b/include/linux/ktime.h
@@ -330,6 +330,24 @@ static inline ktime_t ktime_sub_us(const ktime_t kt, const u64 usec)
 
 extern ktime_t ktime_add_safe(const ktime_t lhs, const ktime_t rhs);
 
+/**
+ * ktime_to_timespec_cond - convert a ktime_t variable to timespec
+ *			    format only if the variable contains data
+ * @kt:		the ktime_t variable to convert
+ * @ts:		the timespec variable to store the result in
+ *
+ * Returns true if there was a successful conversion, false if kt was 0.
+ */
+static inline bool ktime_to_timespec_cond(const ktime_t kt, struct timespec *ts)
+{
+	if (kt.tv64) {
+		*ts = ktime_to_timespec(kt);
+		return true;
+	} else {
+		return false;
+	}
+}
+
 /*
  * The resolution of the clocks. The resolution value is returned in
  * the clock_getres() system call to give application programmers an