Index: clang/docs/ReleaseNotes.rst
===================================================================
--- clang/docs/ReleaseNotes.rst
+++ clang/docs/ReleaseNotes.rst
@@ -200,10 +200,26 @@
 Objective-C Language Changes in Clang
 -------------------------------------
 
-OpenCL C Language Changes in Clang
-----------------------------------
-
-...
+OpenCL Kernel Language Changes in Clang
+---------------------------------------
+
+- Improved online documentation: UsersManual and OpenCLSupport pages.
+- Added ``-cl-std=CL3.0`` and predefined version macro for OpenCL 3.0.
+- Added ``-cl-std=CL1.0`` and mapped to the existing  OpenCL 1.0 functionality.
+- Improved OpenCL extension handling per target.
+- Added clang extension for function pointers ``__cl_clang_function_pointers``
+  and  variadic functions ``__cl_clang_variadic_functions``.
+- Improve diagnostics for nested pointers, unevaluated ``vec_step`` expression.
+- Added ``global_device`` and ``global_host`` address spaces for USM
+  allocations.
+
+Miscellaneous improvements in C++ for OpenCL support:
+- Added diagnostics for pointers to member functions and references to
+  functions.
+- Added support of ``vec_step`` builtin.
+- Fix ICE on address spaces with forwarding references and templated copy
+  constructors.
+- Remove warning for variadic macro use.
 
 ABI Changes in Clang
 --------------------