diff --git a/arch/microblaze/include/asm/page.h b/arch/microblaze/include/asm/page.h
index 665f29330ce1cc52891e08297762d6bcba5f8525..352cc2352bd5109982a879e3571d9b541d6f46a6 100644
--- a/arch/microblaze/include/asm/page.h
+++ b/arch/microblaze/include/asm/page.h
@@ -136,6 +136,7 @@ extern unsigned long max_pfn;
 
 extern unsigned long memory_start;
 extern unsigned long memory_size;
+extern unsigned long lowmem_size;
 
 extern int page_is_ram(unsigned long pfn);
 
diff --git a/arch/microblaze/mm/pgtable.c b/arch/microblaze/mm/pgtable.c
index 84905da83cb7c0639dfec0b033a8bd99b0541c09..d1c06d07fed867b031aa9c0043661ebf15f0b899 100644
--- a/arch/microblaze/mm/pgtable.c
+++ b/arch/microblaze/mm/pgtable.c
@@ -167,7 +167,7 @@ void __init mapin_ram(void)
 
 	v = CONFIG_KERNEL_START;
 	p = memory_start;
-	for (s = 0; s < CONFIG_LOWMEM_SIZE; s += PAGE_SIZE) {
+	for (s = 0; s < lowmem_size; s += PAGE_SIZE) {
 		f = _PAGE_PRESENT | _PAGE_ACCESSED |
 				_PAGE_SHARED | _PAGE_HWEXEC;
 		if ((char *) v < _stext || (char *) v >= _etext)