Index: kernel/arch/ia32/src/mm/km.c
===================================================================
--- kernel/arch/ia32/src/mm/km.c	(revision 40c8c17482d672e755c855c6fd5664b0e933e483)
+++ kernel/arch/ia32/src/mm/km.c	(revision efb48ebf4be82c1df6d4bef51b7a15c85de1af3f)
@@ -34,4 +34,6 @@
 #include <mm/km.h>
 #include <config.h>
+#include <typedefs.h>
+#include <macros.h>
 
 void km_identity_arch_init(void)
@@ -47,4 +49,10 @@
 }
 
+bool km_is_non_identity_arch(uintptr_t addr)
+{
+	return iswithin(KM_IA32_NON_IDENTITY_START, KM_IA32_NON_IDENTITY_SIZE,
+	    addr, 1);
+}
+
 /** @}
  */