diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 94f5a8eb2c22..bd9de7b00c0a 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -1416,6 +1416,12 @@ config HIGHMEM
 	bool "High Memory Support"
 	depends on MIPS32 && (CPU_R3000 || CPU_SB1 || CPU_R7000 || CPU_RM9000 || CPU_R10000) && !(MACH_DECSTATION || MOMENCO_JAGUAR_ATX)
 
+config ARCH_FLATMEM_ENABLE
+	def_bool y
+	depends on !NUMA
+
+source "mm/Kconfig"
+
 config SMP
 	bool "Multi-Processing support"
 	depends on CPU_RM9000 || (SIBYTE_SB1250 && !SIBYTE_STANDALONE) || SGI_IP27
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 6018ca25aceb..3a240e3e004c 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -33,6 +33,7 @@
 #include <linux/root_dev.h>
 #include <linux/highmem.h>
 #include <linux/console.h>
+#include <linux/mmzone.h>
 
 #include <asm/addrspace.h>
 #include <asm/bootinfo.h>
@@ -356,6 +357,8 @@ static inline void bootmem_init(void)
 	}
 #endif
 
+	memory_present(0, first_usable_pfn, max_low_pfn);
+
 	/* Initialize the boot-time allocator with low memory only.  */
 	bootmap_size = init_bootmem(first_usable_pfn, max_low_pfn);
 
@@ -557,6 +560,7 @@ void __init setup_arch(char **cmdline_p)
 
 	parse_cmdline_early();
 	bootmem_init();
+	sparse_init();
 	paging_init();
 	resource_init();
 }
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 73843c528778..9c9a271c8a3a 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -128,7 +128,7 @@ static void __init fixrange_init(unsigned long start, unsigned long end,
 #endif /* CONFIG_MIPS64 */
 #endif /* CONFIG_HIGHMEM */
 
-#ifndef CONFIG_DISCONTIGMEM
+#ifndef CONFIG_NEED_MULTIPLE_NODES
 extern void pagetable_init(void);
 
 void __init paging_init(void)
@@ -253,7 +253,7 @@ void __init mem_init(void)
 	       initsize >> 10,
 	       (unsigned long) (totalhigh_pages << (PAGE_SHIFT-10)));
 }
-#endif /* !CONFIG_DISCONTIGMEM */
+#endif /* !CONFIG_NEED_MULTIPLE_NODES */
 
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
diff --git a/arch/mips/mm/pgtable.c b/arch/mips/mm/pgtable.c
index 3b88fdeef329..3fe94202da8c 100644
--- a/arch/mips/mm/pgtable.c
+++ b/arch/mips/mm/pgtable.c
@@ -5,7 +5,7 @@
 
 void show_mem(void)
 {
-#ifndef CONFIG_DISCONTIGMEM  /* XXX(hch): later.. */
+#ifndef CONFIG_NEED_MULTIPLE_NODES  /* XXX(hch): later.. */
 	int pfn, total = 0, reserved = 0;
 	int shared = 0, cached = 0;
 	int highmem = 0;
diff --git a/include/asm-mips/mmzone.h b/include/asm-mips/mmzone.h
index 29ee13be0b2a..d721143dbd47 100644
--- a/include/asm-mips/mmzone.h
+++ b/include/asm-mips/mmzone.h
@@ -8,6 +8,8 @@
 #include <asm/page.h>
 #include <mmzone.h>
 
+#ifdef CONFIG_DISCONTIGMEM
+
 #define kvaddr_to_nid(kvaddr)	pa_to_nid(__pa(kvaddr))
 #define pfn_to_nid(pfn)		pa_to_nid((pfn) << PAGE_SHIFT)
 
@@ -36,4 +38,6 @@
 /* XXX: FIXME -- wli */
 #define kern_addr_valid(addr)	(0)
 
+#endif /* CONFIG_DISCONTIGMEM */
+
 #endif /* _ASM_MMZONE_H_ */
diff --git a/include/asm-mips/page.h b/include/asm-mips/page.h
index d1bf8240e73b..5cae35cd9ba9 100644
--- a/include/asm-mips/page.h
+++ b/include/asm-mips/page.h
@@ -127,7 +127,7 @@ static __inline__ int get_order(unsigned long size)
 
 #define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
 
-#ifndef CONFIG_DISCONTIGMEM
+#ifndef CONFIG_NEED_MULTIPLE_NODES
 #define pfn_to_page(pfn)	(mem_map + (pfn))
 #define page_to_pfn(page)	((unsigned long)((page) - mem_map))
 #define pfn_valid(pfn)		((pfn) < max_mapnr)
diff --git a/include/asm-mips/pgtable.h b/include/asm-mips/pgtable.h
index 878843203d67..e76ccd6e3a5d 100644
--- a/include/asm-mips/pgtable.h
+++ b/include/asm-mips/pgtable.h
@@ -350,7 +350,7 @@ static inline void update_mmu_cache(struct vm_area_struct *vma,
 	__update_cache(vma, address, pte);
 }
 
-#ifndef CONFIG_DISCONTIGMEM
+#ifndef CONFIG_NEED_MULTIPLE_NODES
 #define kern_addr_valid(addr)	(1)
 #endif