diff --git a/arch/score/include/asm/page.h b/arch/score/include/asm/page.h
index d92a5a2d36d40c434ee833543275b6e296ef192b..1e9ade8e77e69e1dfd3c1f0d0595db5af853c90c 100644
--- a/arch/score/include/asm/page.h
+++ b/arch/score/include/asm/page.h
@@ -74,7 +74,7 @@ extern unsigned long max_pfn;
 #define page_to_bus(page)	(page_to_phys(page))
 #define phys_to_page(paddr)	(pfn_to_page(phys_to_pfn(paddr)))
 
-#define pfn_valid(pfn)		((pfn) >= min_low_pfn && (pfn) < max_mapnr)
+#define pfn_valid(pfn)		(((pfn) >= min_low_pfn) && ((pfn) < max_low_pfn))
 
 #define ARCH_PFN_OFFSET		(PAGE_OFFSET >> PAGE_SHIFT)
 
diff --git a/arch/score/kernel/setup.c b/arch/score/kernel/setup.c
index 6a2503c75c4ef113f06421a41d09d962118d1368..6f898c0578781cf0862863d6e23a931c60b12c17 100644
--- a/arch/score/kernel/setup.c
+++ b/arch/score/kernel/setup.c
@@ -49,6 +49,7 @@ static void __init bootmem_init(void)
 
 	min_low_pfn = PFN_UP(MEMORY_START);
 	max_low_pfn = PFN_UP(MEMORY_START + MEMORY_SIZE);
+	max_mapnr = max_low_pfn - min_low_pfn;
 
 	/* Initialize the boot-time allocator with low memory only. */
 	bootmap_size = init_bootmem_node(NODE_DATA(0), start_pfn,
diff --git a/arch/score/mm/init.c b/arch/score/mm/init.c
index 4e3dcd0c4716d85a413972472f10f0b39aa6c86b..8c15b2c85d5a1d6afb6d7996f16b08948a21baee 100644
--- a/arch/score/mm/init.c
+++ b/arch/score/mm/init.c
@@ -83,7 +83,6 @@ void __init mem_init(void)
 	unsigned long codesize, reservedpages, datasize, initsize;
 	unsigned long tmp, ram = 0;
 
-	max_mapnr = max_low_pfn;
 	high_memory = (void *) __va(max_low_pfn << PAGE_SHIFT);
 	totalram_pages += free_all_bootmem();
 	totalram_pages -= setup_zero_page();	/* Setup zeroed pages. */
@@ -101,10 +100,6 @@ void __init mem_init(void)
 	datasize = (unsigned long) &_edata - (unsigned long) &_etext;
 	initsize = (unsigned long) &__init_end - (unsigned long) &__init_begin;
 
-	kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
-	kclist_add(&kcore_vmalloc, (void *) VMALLOC_START,
-			VMALLOC_END - VMALLOC_START);
-
 	printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
 			"%ldk reserved, %ldk data, %ldk init, %ldk highmem)\n",
 			(unsigned long) nr_free_pages() << (PAGE_SHIFT-10),