diff --git a/Makefile b/Makefile
index a105cb893b4ca0..32dce415d703d1 100644
--- a/Makefile
+++ b/Makefile
@@ -593,6 +593,7 @@ ifdef RUST_LIB_SRC
 	export RUST_LIB_SRC
 endif
 
+# Allows the usage of unstable features in stable compilers.
 export RUSTC_BOOTSTRAP := 1
 
 export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC HOSTPKG_CONFIG
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index 3b64dda7e4ccef..41013d9a18acba 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -32,7 +32,13 @@
 
 #define KSYM_NAME_LEN		512
 
-/* A substantially bigger size than the current maximum. */
+/*
+ * A substantially bigger size than the current maximum.
+ *
+ * It cannot be defined as an expression because it gets stringified
+ * for the fscanf() format string. Therefore, a _Static_assert() is
+ * used instead to maintain the relationship with KSYM_NAME_LEN.
+ */
 #define KSYM_NAME_LEN_BUFFER	2048
 _Static_assert(
 	KSYM_NAME_LEN_BUFFER == KSYM_NAME_LEN * 4,