From 55a7d18189cfa65a35dacf63ee9e70aedd85e3c4 Mon Sep 17 00:00:00 2001
From: Austin Kiekintveld <akiekintveld@icloud.com>
Date: Sun, 1 May 2022 19:07:36 -0700
Subject: [PATCH] Add comment

---
 library/std/src/sys_common/condvar/check.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/library/std/src/sys_common/condvar/check.rs b/library/std/src/sys_common/condvar/check.rs
index a3842b3f857..d0d0d596518 100644
--- a/library/std/src/sys_common/condvar/check.rs
+++ b/library/std/src/sys_common/condvar/check.rs
@@ -24,6 +24,8 @@ impl SameMutexCheck {
     }
     pub fn verify(&self, mutex: &MovableMutex) {
         let addr = mutex.raw() as *const imp::Mutex as *const () as *mut _;
+        // Relaxed is okay here because we never read through `self.addr`, and only use it to
+        // compare addresses.
         match self.addr.compare_exchange(
             ptr::null_mut(),
             addr,