diff --git a/arch/x86/Makefile b/arch/x86/Makefile
index 801fd85c3ef693..e8214bff1aebd2 100644
--- a/arch/x86/Makefile
+++ b/arch/x86/Makefile
@@ -220,7 +220,7 @@ ifdef CONFIG_MITIGATION_RETPOLINE
   KBUILD_CFLAGS += $(RETPOLINE_CFLAGS)
   # Additionally, avoid generating expensive indirect jumps which
   # are subject to retpolines for small number of switch cases.
-  # clang turns off jump table generation by default when under
+  # LLVM turns off jump table generation by default when under
   # retpoline builds, however, gcc does not for x86. This has
   # only been fixed starting from gcc stable version 8.4.0 and
   # onwards, but not for older ones. See gcc bug #86952.
diff --git a/scripts/generate_rust_target.rs b/scripts/generate_rust_target.rs
index 87f34925eb7b71..a89439cb465849 100644
--- a/scripts/generate_rust_target.rs
+++ b/scripts/generate_rust_target.rs
@@ -164,7 +164,14 @@ fn main() {
         );
         let mut features = "-3dnow,-3dnowa,-mmx,+soft-float".to_string();
         if cfg.has("MITIGATION_RETPOLINE") {
+            // The kernel uses `-mretpoline-external-thunk` (for Clang), which Clang maps to the
+            // target feature of the same name plus the other two target features in
+            // `clang/lib/Driver/ToolChains/Arch/X86.cpp`. These should be eventually enabled via
+            // `-Ctarget-feature` when `rustc` starts recognizing them (or via a new dedicated
+            // flag); see https://github.com/rust-lang/rust/issues/116852.
             features += ",+retpoline-external-thunk";
+            features += ",+retpoline-indirect-branches";
+            features += ",+retpoline-indirect-calls";
         }
         ts.push("features", features);
         ts.push("llvm-target", "x86_64-linux-gnu");