On Wed, 16 Oct 2024 13:03:48 -0700
Boqun Feng [off-list ref] wrote:

quoted

 impl core::ops::Sub for Ktime {
-    type Output = Ktime;
+    type Output = Delta;
 
     #[inline]
-    fn sub(self, other: Ktime) -> Ktime {
-        Self {
-            inner: self.inner - other.inner,
+    fn sub(self, other: Ktime) -> Delta {
+        Delta {
+            nanos: self.inner - other.inner,

My understanding is that ktime_t, when used as a timestamp, can only
have a value in range [0, i64::MAX], so this substraction here never
overflows, maybe we want add a comment here?

Sure, I'll add.