Rollup merge of rust-lang#45882 - japaric:gh45802, r=kennytm

fix core for targets with max-atomic-width = 0 closes rust-lang#45802 cc @kennytm
kennytm · Nov 10, 2017 · 20e11db · 20e11db
2 parents e26bcbe + 47ed473
commit 20e11db
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/src/libcore/sync/atomic.rs b/src/libcore/sync/atomic.rs
@@ -927,6 +927,7 @@ impl<T> AtomicPtr<T> {
     }
 }
 
+#[cfg(target_has_atomic = "ptr")]
 #[stable(feature = "atomic_from", since = "1.23.0")]
 impl<T> From<*mut T> for AtomicPtr<T> {
     #[inline]