diff --git a/riscv64/include/atomic b/riscv64/include/atomic
index 1462cf5..a75baf3 100644
--- a/riscv64/include/atomic
+++ b/riscv64/include/atomic
@@ -1650,6 +1650,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       using __atomic_float<double>::operator=;
     };
 
+#if !(defined(__clang__) && !__STDC_HOSTED__) // clang in kernel context
   template<>
     struct atomic<long double> : __atomic_float<long double>
     {
@@ -1664,6 +1665,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
 
       using __atomic_float<long double>::operator=;
     };
+#endif
 
 #ifdef __STDCPP_FLOAT16_T__
   template<>
diff --git a/riscv64/include/bits/stl_algobase.h b/riscv64/include/bits/stl_algobase.h
index d831e0e..f0fbf22 100644
--- a/riscv64/include/bits/stl_algobase.h
+++ b/riscv64/include/bits/stl_algobase.h
@@ -1072,8 +1072,10 @@ _GLIBCXX_END_NAMESPACE_CONTAINER
   __size_to_integer(float __n) { return (long long)__n; }
   inline _GLIBCXX_CONSTEXPR long long
   __size_to_integer(double __n) { return (long long)__n; }
+#if !(defined(__clang__) && !__STDC_HOSTED__) // clang in kernel context
   inline _GLIBCXX_CONSTEXPR long long
   __size_to_integer(long double __n) { return (long long)__n; }
+#endif
 #if !defined(__STRICT_ANSI__) && defined(_GLIBCXX_USE_FLOAT128)
   __extension__ inline _GLIBCXX_CONSTEXPR long long
   __size_to_integer(__float128 __n) { return (long long)__n; }