Our custom Vec type is missing the stdlib method `clear`, thus add it.
It will be used in the miscdevice sample.

Signed-off-by: Alice Ryhl <aliceryhl@google.com>
---
 rust/kernel/alloc/kvec.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/rust/kernel/alloc/kvec.rs b/rust/kernel/alloc/kvec.rs
index eb6d40a1bf8ba45126bd47f1dd4a7b7ef86112c4..95e752ed27395fce72d372976b74fb1b0e957194 100644
--- a/rust/kernel/alloc/kvec.rs
+++ b/rust/kernel/alloc/kvec.rs
@@ -395,6 +395,26 @@ pub fn into_raw_parts(self) -> (*mut T, usize, usize) {
         (ptr, len, capacity)
     }
 
+    /// Clears the vector, removing all values.
+    ///
+    /// Note that this method has no effect on the allocated capacity
+    /// of the vector.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// let mut v = kernel::kvec![1, 2, 3]?;
+    ///
+    /// v.clear();
+    ///
+    /// assert!(v.is_empty());
+    /// # Ok::<(), Error>(())
+    /// ```
+    #[inline]
+    pub fn clear(&mut self) {
+        self.truncate(0);
+    }
+
     /// Ensures that the capacity exceeds the length by at least `additional` elements.
     ///
     /// # Examples

-- 
2.49.0.rc1.451.g8f38331e32-goog

On Thu, Mar 20, 2025 at 10:06 AM Alice Ryhl <aliceryhl@google.com> wrote:
>
> Our custom Vec type is missing the stdlib method `clear`, thus add it.
> It will be used in the miscdevice sample.
>
> Signed-off-by: Alice Ryhl <aliceryhl@google.com>

Reviewed-by: Tamir Duberstein <tamird@gmail.com>

On Thu Mar 20, 2025 at 2:52 PM CET, Alice Ryhl wrote:
> Our custom Vec type is missing the stdlib method `clear`, thus add it.
> It will be used in the miscdevice sample.
>
> Signed-off-by: Alice Ryhl <aliceryhl@google.com>

Reviewed-by: Benno Lossin <benno.lossin@proton.me>

---
Cheers,
Benno

> ---
>  rust/kernel/alloc/kvec.rs | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
>
> diff --git a/rust/kernel/alloc/kvec.rs b/rust/kernel/alloc/kvec.rs
> index eb6d40a1bf8ba45126bd47f1dd4a7b7ef86112c4..95e752ed27395fce72d372976b74fb1b0e957194 100644
> --- a/rust/kernel/alloc/kvec.rs
> +++ b/rust/kernel/alloc/kvec.rs
> @@ -395,6 +395,26 @@ pub fn into_raw_parts(self) -> (*mut T, usize, usize) {
>          (ptr, len, capacity)
>      }
>  
> +    /// Clears the vector, removing all values.
> +    ///
> +    /// Note that this method has no effect on the allocated capacity
> +    /// of the vector.
> +    ///
> +    /// # Examples
> +    ///
> +    /// ```
> +    /// let mut v = kernel::kvec![1, 2, 3]?;
> +    ///
> +    /// v.clear();
> +    ///
> +    /// assert!(v.is_empty());
> +    /// # Ok::<(), Error>(())
> +    /// ```
> +    #[inline]
> +    pub fn clear(&mut self) {
> +        self.truncate(0);
> +    }
> +
>      /// Ensures that the capacity exceeds the length by at least `additional` elements.
>      ///
>      /// # Examples