diff --git a/arch/powerpc/mm/40x_mmu.c b/arch/powerpc/mm/40x_mmu.c
index f5e7b9ce63ddaa46f9ee10da0636b6d070b95431..08dfa8e6d86fa6a842474074f43d0b77e7d87fe6 100644
--- a/arch/powerpc/mm/40x_mmu.c
+++ b/arch/powerpc/mm/40x_mmu.c
@@ -91,7 +91,7 @@ void __init MMU_init_hw(void)
 #define LARGE_PAGE_SIZE_16M	(1<<24)
 #define LARGE_PAGE_SIZE_4M	(1<<22)
 
-unsigned long __init mmu_mapin_ram(void)
+unsigned long __init mmu_mapin_ram(unsigned long top)
 {
 	unsigned long v, s, mapped;
 	phys_addr_t p;
diff --git a/arch/powerpc/mm/44x_mmu.c b/arch/powerpc/mm/44x_mmu.c
index 98052ac96580d69dc0566fb711594625f2f470b2..3986264b09930a198c1932b8a28cadb7a05b8042 100644
--- a/arch/powerpc/mm/44x_mmu.c
+++ b/arch/powerpc/mm/44x_mmu.c
@@ -88,7 +88,7 @@ void __init MMU_init_hw(void)
 	flush_instruction_cache();
 }
 
-unsigned long __init mmu_mapin_ram(void)
+unsigned long __init mmu_mapin_ram(unsigned long top)
 {
 	unsigned long addr;
 
diff --git a/arch/powerpc/mm/fsl_booke_mmu.c b/arch/powerpc/mm/fsl_booke_mmu.c
index dc93e95b256eae04e248900e82858d94c8fe822a..6da4b9087b3f9be10d7e60ea90db753d16ae6e27 100644
--- a/arch/powerpc/mm/fsl_booke_mmu.c
+++ b/arch/powerpc/mm/fsl_booke_mmu.c
@@ -156,7 +156,7 @@ void invalidate_tlbcam_entry(int index)
 	loadcam_entry(index);
 }
 
-unsigned long __init mmu_mapin_ram(void)
+unsigned long __init mmu_mapin_ram(unsigned long top)
 {
 	unsigned long virt = PAGE_OFFSET;
 	phys_addr_t phys = memstart_addr;
diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
index 34dacc32250df81d0bfebbb0f5f24df1b5abec24..06f708c38f1b78368398b3b5924ffa78f01bfdea 100644
--- a/arch/powerpc/mm/mmu_decl.h
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -150,15 +150,15 @@ extern void wii_memory_fixups(void);
  */
 #if defined(CONFIG_8xx)
 #define MMU_init_hw()		do { } while(0)
-#define mmu_mapin_ram()		(0UL)
+#define mmu_mapin_ram(top)	(0UL)
 
 #elif defined(CONFIG_4xx)
 extern void MMU_init_hw(void);
-extern unsigned long mmu_mapin_ram(void);
+extern unsigned long mmu_mapin_ram(unsigned long top);
 
 #elif defined(CONFIG_FSL_BOOKE)
 extern void MMU_init_hw(void);
-extern unsigned long mmu_mapin_ram(void);
+extern unsigned long mmu_mapin_ram(unsigned long top);
 extern void adjust_total_lowmem(void);
 
 #elif defined(CONFIG_PPC32)