From 3be40b22c83491e4a4d34e2ad06aa81b804b9fad Mon Sep 17 00:00:00 2001
From: Mara Bos <m-ou.se@m-ou.se>
Date: Sat, 12 Sep 2020 21:20:17 +0200
Subject: [PATCH] Fix AtomicPtr::from_mut align check: Avoid generic arg in
 const expr.

See #76200.
---
 library/core/src/sync/atomic.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/library/core/src/sync/atomic.rs b/library/core/src/sync/atomic.rs
index cdd9b3ae90b..920a82f5af4 100644
--- a/library/core/src/sync/atomic.rs
+++ b/library/core/src/sync/atomic.rs
@@ -858,7 +858,7 @@ impl<T> AtomicPtr<T> {
     #[inline]
     #[unstable(feature = "atomic_from_mut", issue = "76314")]
     pub fn from_mut(v: &mut *mut T) -> &Self {
-        let [] = [(); align_of::<Self>() - align_of::<*mut T>()];
+        let [] = [(); align_of::<AtomicPtr<()>>() - align_of::<*mut ()>()];
         // SAFETY:
         //  - the mutable reference guarantees unique ownership.
         //  - the alignment of `*mut T` and `Self` is the same on all platforms