diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -69,6 +69,9 @@
 
 - Clang plugin arguments can now be passed through the compiler driver via
   ``-fplugin-arg-pluginname-arg``, similar to GCC's ``-fplugin-arg``.
+- The ``-mbranch-protection`` flag will now also work for the ARM backend
+- The ``-mno-bti-at-return-twice`` flag will make sure a BTI instruction won't
+  be added after a setjmp or other return-twice construct (ARM backend only).
 
 Deprecated Compiler Flags
 -------------------------
@@ -226,6 +229,8 @@
   architecture features, but will enable certain optimizations specific to
   Cortex-A57 CPUs and enable the use of a more accurate scheduling model.
 
+Do not add a BTI instruction after a setjmp or other return-twice construct (Arm
+only)
 
 Floating Point Support in Clang
 -------------------------------
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -83,6 +83,7 @@
 --------------------------
 
 * Added support for the Armv9-A, Armv9.1-A and Armv9.2-A architectures.
+* Added support for the Armv8.1-M PACBTI-M extension.
 
 Changes to the MIPS Target
 --------------------------