linux-kernel - [PATCH v3 2/2] rust: alloc: kvec: add doc example for `as

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Message-Id: <376014022fa799f5480f6f993f1e25b2561507e4.1753339262.git.zhuhui@kylinos.cn>
Date: Thu, 24 Jul 2025 15:54:19 +0800
From: Hui Zhu <hui.zhu@...ux.dev>
To: Danilo Krummrich <dakr@...nel.org>,
	Lorenzo Stoakes <lorenzo.stoakes@...cle.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	"Liam R . Howlett" <Liam.Howlett@...cle.com>,
	Uladzislau Rezki <urezki@...il.com>,
	Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Boqun Feng <boqun.feng@...il.com>,
	Gary Guo <gary@...yguo.net>,
	bjorn3_gh@...tonmail.com,
	Benno Lossin <lossin@...nel.org>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>,
	Trevor Gross <tmgross@...ch.edu>,
	rust-for-linux@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Hui Zhu <zhuhui@...inos.cn>,
	Geliang Tang <geliang@...nel.org>
Subject: [PATCH v3 2/2] rust: alloc: kvec: add doc example for `as_slice` method

From: Hui Zhu <zhuhui@...inos.cn>

Add a practical usage example to the documentation of `KVec::as_slice()`
showing how to:
Create a new `KVec`
Push elements into it
Convert to a slice via `as_slice()`

Co-developed-by: Geliang Tang <geliang@...nel.org>
Signed-off-by: Geliang Tang <geliang@...nel.org>
Signed-off-by: Hui Zhu <zhuhui@...inos.cn>
---
 rust/kernel/alloc/kvec.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/rust/kernel/alloc/kvec.rs b/rust/kernel/alloc/kvec.rs
index 3c72e0bdddb8..d384c34d1a5e 100644
--- a/rust/kernel/alloc/kvec.rs
+++ b/rust/kernel/alloc/kvec.rs
@@ -224,6 +224,15 @@ unsafe fn dec_len(&mut self, count: usize) -> &mut [T] {
     }
 
     /// Returns a slice of the entire vector.
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// let mut v = KVec::new();
+    /// v.push(1, GFP_KERNEL);
+    /// v.push(2, GFP_KERNEL);
+    /// assert_eq!(v.as_slice(), &[1, 2]);
+    /// ```
     #[inline]
     pub fn as_slice(&self) -> &[T] {
         self
-- 
2.43.0