From a99a3518020e1c7ea6db6f9d2e7e567637a3d7e7 Mon Sep 17 00:00:00 2001
From: Roman <r.proskuryakoff@gmail.com>
Date: Thu, 4 Sep 2025 11:39:28 -0300
Subject: [PATCH] sync: use `UnsafeCell::get_mut` in `Mutex::get_mut` and
 `RwLock::get_mut` (#7569)

---
 tokio/src/sync/mutex.rs  | 5 +----
 tokio/src/sync/rwlock.rs | 5 +----
 2 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/tokio/src/sync/mutex.rs b/tokio/src/sync/mutex.rs
index 30f0bdece..7feedc8b9 100644
--- a/tokio/src/sync/mutex.rs
+++ b/tokio/src/sync/mutex.rs
@@ -716,10 +716,7 @@ impl<T: ?Sized> Mutex<T> {
     /// }
     /// ```
     pub fn get_mut(&mut self) -> &mut T {
-        unsafe {
-            // Safety: This is https://github.com/rust-lang/rust/pull/76936
-            &mut *self.c.get()
-        }
+        self.c.get_mut()
     }
 
     /// Attempts to acquire the lock, and returns [`TryLockError`] if the lock
diff --git a/tokio/src/sync/rwlock.rs b/tokio/src/sync/rwlock.rs
index d94b65143..087c5b3da 100644
--- a/tokio/src/sync/rwlock.rs
+++ b/tokio/src/sync/rwlock.rs
@@ -1073,10 +1073,7 @@ impl<T: ?Sized> RwLock<T> {
     /// }
     /// ```
     pub fn get_mut(&mut self) -> &mut T {
-        unsafe {
-            // Safety: This is https://github.com/rust-lang/rust/pull/76936
-            &mut *self.c.get()
-        }
+        self.c.get_mut()
     }
 
     /// Consumes the lock, returning the underlying data.