Index: include/clang/Sema/Sema.h
===================================================================
--- include/clang/Sema/Sema.h
+++ include/clang/Sema/Sema.h
@@ -9443,7 +9443,7 @@
 
   /// May add implicit CUDAHostAttr and CUDADeviceAttr attributes to FD,
   /// depending on FD and the current compilation settings.
-  void maybeAddCUDAHostDeviceAttrs(Scope *S, FunctionDecl *FD,
+  void maybeAddCUDAHostDeviceAttrs(FunctionDecl *FD,
                                    const LookupResult &Previous);
 
 public:
Index: lib/Sema/SemaCUDA.cpp
===================================================================
--- lib/Sema/SemaCUDA.cpp
+++ lib/Sema/SemaCUDA.cpp
@@ -439,7 +439,7 @@
 // ForceCUDAHostDeviceDepth > 0 (corresponding to code within a
 //   #pragma clang force_cuda_host_device_begin/end
 // pair).
-void Sema::maybeAddCUDAHostDeviceAttrs(Scope *S, FunctionDecl *NewD,
+void Sema::maybeAddCUDAHostDeviceAttrs(FunctionDecl *NewD,
                                        const LookupResult &Previous) {
   assert(getLangOpts().CUDA && "Should only be called during CUDA compilation");
 
Index: lib/Sema/SemaDecl.cpp
===================================================================
--- lib/Sema/SemaDecl.cpp
+++ lib/Sema/SemaDecl.cpp
@@ -8264,7 +8264,7 @@
   ProcessDeclAttributes(S, NewFD, D);
 
   if (getLangOpts().CUDA)
-    maybeAddCUDAHostDeviceAttrs(S, NewFD, Previous);
+    maybeAddCUDAHostDeviceAttrs(NewFD, Previous);
 
   if (getLangOpts().OpenCL) {
     // OpenCL v1.1 s6.5: Using an address space qualifier in a function return