From 73743ddbff5a7a0ffc8f7ecc780369cf5509795b Mon Sep 17 00:00:00 2001
From: Justus Klausecker <justus@klausecker.de>
Date: Fri, 6 Mar 2026 00:08:30 +0100
Subject: [PATCH] std.atomic.Mutex: use unordered atomic load on assert

This silences a tsan race warning and gets optimized away in `ReleaseFast`.
---
 lib/std/atomic.zig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/std/atomic.zig b/lib/std/atomic.zig
index 0040dbf735eeaabad5c5d532663757bfb5de5491..b564c0c67a443e264b57ba14f3fde35633c8bb05 100644
--- a/lib/std/atomic.zig
+++ b/lib/std/atomic.zig
@@ -513,7 +513,7 @@ pub const Mutex = enum(u8) {
     }
 
     pub fn unlock(m: *Mutex) void {
-        assert(m.* == .locked);
+        assert(@atomicLoad(Mutex, m, .unordered) == .locked);
         @atomicStore(Mutex, m, .unlocked, .release);
     }
 };
-- 
2.54.0