diff --git a/.gitmodules b/.gitmodules
index 014a786e0d102..90818aa12ae6f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -37,7 +37,7 @@
 [submodule "src/llvm-project"]
 	path = src/llvm-project
 	url = https://github.com/mabezdev/llvm-project.git
-	branch = xtensa_release_9.0.1_with_rust_patches
+	branch = xtensa_release_9.0.1_with_rust_patches-31-05-2020
 [submodule "src/doc/embedded-book"]
 	path = src/doc/embedded-book
 	url = https://github.com/rust-embedded/book.git
diff --git a/src/llvm-project b/src/llvm-project
index 1ad7aa125bedd..5b6fedeaca99d 160000
--- a/src/llvm-project
+++ b/src/llvm-project
@@ -1 +1 @@
-Subproject commit 1ad7aa125beddfb126516ba60f26a9bcb8103e51
+Subproject commit 5b6fedeaca99d2951f1c72d116ae3ba05814aab6