Align <atomic> with clang r163964 which disallows const _Atomic types.
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@164004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/atomic b/include/atomic
index 6a200eb..6dffdb2 100644
--- a/include/atomic
+++ b/include/atomic
@@ -555,7 +555,7 @@
template <class _Tp, bool = is_integral<_Tp>::value && !is_same<_Tp, bool>::value>
struct __atomic_base // false
{
- _Atomic(_Tp) __a_;
+ mutable _Atomic(_Tp) __a_;
_LIBCPP_INLINE_VISIBILITY
bool is_lock_free() const volatile _NOEXCEPT