Merge tag 'hwspinlock-3.10' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad...

[firefly-linux-kernel-4.4.55.git] / include / linux / ktime.h

diff --git a/include/linux/ktime.h b/include/linux/ktime.h
index e83512f63df550a64cba3fb74c51c5c3b5dc9030..bbca12804d12434ebfb100487c460c2ed21f99ed 100644 (file)
--- 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