Add PartialEq/Eq/PartialOrd/Ord trait to Ktime so two Ktime instances
can be compared to determine whether a timeout is met or not.

Use the derive implements; we directly touch C's ktime_t rather than
using the C's accessors because it is more efficient and we already do
in the existing code (Ktime::sub).

Reviewed-by: Trevor Gross <tmgross@umich.edu>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
---
 rust/kernel/time.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rust/kernel/time.rs b/rust/kernel/time.rs
index 379c0f5772e5..48b71e6641ce 100644
--- a/rust/kernel/time.rs
+++ b/rust/kernel/time.rs
@@ -27,7 +27,7 @@ pub fn msecs_to_jiffies(msecs: Msecs) -> Jiffies {
 
 /// A Rust wrapper around a `ktime_t`.
 #[repr(transparent)]
-#[derive(Copy, Clone)]
+#[derive(Copy, Clone, PartialEq, PartialOrd, Eq, Ord)]
 pub struct Ktime {
     inner: bindings::ktime_t,
 }
-- 
2.43.0

On Thu, 16 Jan 2025 13:40:53 +0900
FUJITA Tomonori <fujita.tomonori@gmail.com> wrote:

> Add PartialEq/Eq/PartialOrd/Ord trait to Ktime so two Ktime instances
> can be compared to determine whether a timeout is met or not.
> 
> Use the derive implements; we directly touch C's ktime_t rather than
> using the C's accessors because it is more efficient and we already do
> in the existing code (Ktime::sub).
> 
> Reviewed-by: Trevor Gross <tmgross@umich.edu>
> Reviewed-by: Alice Ryhl <aliceryhl@google.com>
> Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>

Reviewed-by: Gary Guo <gary@garyguo.net>

> ---
>  rust/kernel/time.rs | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/rust/kernel/time.rs b/rust/kernel/time.rs
> index 379c0f5772e5..48b71e6641ce 100644
> --- a/rust/kernel/time.rs
> +++ b/rust/kernel/time.rs
> @@ -27,7 +27,7 @@ pub fn msecs_to_jiffies(msecs: Msecs) -> Jiffies {
>  
>  /// A Rust wrapper around a `ktime_t`.
>  #[repr(transparent)]
> -#[derive(Copy, Clone)]
> +#[derive(Copy, Clone, PartialEq, PartialOrd, Eq, Ord)]
>  pub struct Ktime {
>      inner: bindings::ktime_t,
>  }