[PATCH 12/13] rust: sync: atomic: Update documentation for `fetch_add()`

[Boqun Feng]

From: Andreas Hindborg <a.hindborg@xxxxxxxxxx>

The documentation for `fetch_add()` does not indicate that the original
value is returned by `fetch_add()`. Update the documentation so this is
clear.

Reviewed-by: Alice Ryhl <aliceryhl@xxxxxxxxxx>
Signed-off-by: Andreas Hindborg <a.hindborg@xxxxxxxxxx>
Signed-off-by: Boqun Feng <boqun@xxxxxxxxxx>
Link: https://patch.msgid.link/20260220-atomic-sub-v3-2-e63cbed1d2aa@xxxxxxxxxx
---
 rust/kernel/sync/atomic.rs | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/rust/kernel/sync/atomic.rs b/rust/kernel/sync/atomic.rs
index 545a8d37ba78..9cd009d57e35 100644
--- a/rust/kernel/sync/atomic.rs
+++ b/rust/kernel/sync/atomic.rs
@@ -545,16 +545,14 @@ pub fn add<Rhs>(&self, v: Rhs, _: ordering::Relaxed)
     /// use kernel::sync::atomic::{Atomic, Acquire, Full, Relaxed};
     ///
     /// let x = Atomic::new(42);
-    ///
     /// assert_eq!(42, x.load(Relaxed));
-    ///
-    /// assert_eq!(54, { x.fetch_add(12, Acquire); x.load(Relaxed) });
+    /// assert_eq!(42, x.fetch_add(12, Acquire));
+    /// assert_eq!(54, x.load(Relaxed));
     ///
     /// let x = Atomic::new(42);
-    ///
     /// assert_eq!(42, x.load(Relaxed));
-    ///
-    /// assert_eq!(54, { x.fetch_add(12, Full); x.load(Relaxed) } );
+    /// assert_eq!(42, x.fetch_add(12, Full));
+    /// assert_eq!(54, x.load(Relaxed));
     /// ```
     #[inline(always)]
     pub fn fetch_add<Rhs, Ordering: ordering::Ordering>(&self, v: Rhs, _: Ordering) -> T
-- 
2.50.1 (Apple Git-155)