diff --git a/include/linux/kernel.h b/include/linux/kernel.h
index 4824f26..4c0d3b2 100644
--- a/include/linux/kernel.h
+++ b/include/linux/kernel.h
@@ -287,6 +287,8 @@
 	return kstrtoint_from_user(s, count, base, res);
 }
 
+/* Obsolete, do not use.  Use kstrto<foo> instead */
+
 extern unsigned long simple_strtoul(const char *,char **,unsigned int);
 extern long simple_strtol(const char *,char **,unsigned int);
 extern unsigned long long simple_strtoull(const char *,char **,unsigned int);
@@ -296,6 +298,8 @@
 #define strict_strtoull	kstrtoull
 #define strict_strtoll	kstrtoll
 
+/* lib/printf utilities */
+
 extern __printf(2, 3) int sprintf(char *buf, const char * fmt, ...);
 extern __printf(2, 0) int vsprintf(char *buf, const char *, va_list);
 extern __printf(3, 4)