diff --git a/arch/powerpc/include/asm/io.h b/arch/powerpc/include/asm/io.h
index a8d2ef3..749c66e 100644
--- a/arch/powerpc/include/asm/io.h
+++ b/arch/powerpc/include/asm/io.h
@@ -716,24 +716,24 @@ static inline void iosync(void)
  *   be hooked (but can be used by a hook on iounmap)
  *
  */
-extern void __iomem *ioremap(phys_addr_t address, unsigned long size);
-extern void __iomem *ioremap_prot(phys_addr_t address, unsigned long size,
+extern void __iomem *ioremap(phys_addr_t address, resource_size_t size);
+extern void __iomem *ioremap_prot(phys_addr_t address, resource_size_t size,
 				  unsigned long flags);
-extern void __iomem *ioremap_wc(phys_addr_t address, unsigned long size);
+extern void __iomem *ioremap_wc(phys_addr_t address, resource_size_t size);
 #define ioremap_nocache(addr, size)	ioremap((addr), (size))
 
 extern void iounmap(volatile void __iomem *addr);
 
-extern void __iomem *__ioremap(phys_addr_t, unsigned long size,
+extern void __iomem *__ioremap(phys_addr_t, resource_size_t size,
 			       unsigned long flags);
-extern void __iomem *__ioremap_caller(phys_addr_t, unsigned long size,
+extern void __iomem *__ioremap_caller(phys_addr_t, resource_size_t size,
 				      unsigned long flags, void *caller);
 
 extern void __iounmap(volatile void __iomem *addr);
 
 extern void __iomem * __ioremap_at(phys_addr_t pa, void *ea,
-				   unsigned long size, unsigned long flags);
-extern void __iounmap_at(void *ea, unsigned long size);
+				   resource_size_t size, unsigned long flags);
+extern void __iounmap_at(void *ea, resource_size_t size);
 
 /*
  * When CONFIG_PPC_INDIRECT_PIO is set, we use the generic iomap implementation
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 7692d1b..a7d5137 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -135,7 +135,7 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
 }
 
 void __iomem *
-ioremap(phys_addr_t addr, unsigned long size)
+ioremap(phys_addr_t addr, resource_size_t size)
 {
 	return __ioremap_caller(addr, size, _PAGE_NO_CACHE | _PAGE_GUARDED,
 				__builtin_return_address(0));
@@ -143,7 +143,7 @@ ioremap(phys_addr_t addr, unsigned long size)
 EXPORT_SYMBOL(ioremap);
 
 void __iomem *
-ioremap_wc(phys_addr_t addr, unsigned long size)
+ioremap_wc(phys_addr_t addr, resource_size_t size)
 {
 	return __ioremap_caller(addr, size, _PAGE_NO_CACHE,
 				__builtin_return_address(0));
@@ -151,7 +151,7 @@ ioremap_wc(phys_addr_t addr, unsigned long size)
 EXPORT_SYMBOL(ioremap_wc);
 
 void __iomem *
-ioremap_prot(phys_addr_t addr, unsigned long size, unsigned long flags)
+ioremap_prot(phys_addr_t addr, resource_size_t size, unsigned long flags)
 {
 	/* writeable implies dirty for kernel addresses */
 	if ((flags & (_PAGE_RW | _PAGE_RO)) != _PAGE_RO)
@@ -173,13 +173,13 @@ ioremap_prot(phys_addr_t addr, unsigned long size, unsigned long flags)
 EXPORT_SYMBOL(ioremap_prot);
 
 void __iomem *
-__ioremap(phys_addr_t addr, unsigned long size, unsigned long flags)
+__ioremap(phys_addr_t addr, resource_size_t size, unsigned long flags)
 {
 	return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
 }
 
 void __iomem *
-__ioremap_caller(phys_addr_t addr, unsigned long size, unsigned long flags,
+__ioremap_caller(phys_addr_t addr, resource_size_t size, unsigned long flags,
 		 void *caller)
 {
 	unsigned long v, i;
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index 59daa5e..64dd7a9 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -168,8 +168,8 @@ int map_kernel_page(unsigned long ea, unsigned long pa, int flags)
  * __ioremap_at - Low level function to establish the page tables
  *                for an IO mapping
  */
-void __iomem * __ioremap_at(phys_addr_t pa, void *ea, unsigned long size,
-			    unsigned long flags)
+void __iomem *__ioremap_at(phys_addr_t pa, void *ea, resource_size_t size,
+			   unsigned long flags)
 {
 	unsigned long i;
 
@@ -202,7 +202,7 @@ void __iomem * __ioremap_at(phys_addr_t pa, void *ea, unsigned long size,
  *                  are manipulated manually, like partial unmapping of
  *                  PCI IOs or ISA space.
  */
-void __iounmap_at(void *ea, unsigned long size)
+void __iounmap_at(void *ea, resource_size_t size)
 {
 	WARN_ON(((unsigned long)ea) & ~PAGE_MASK);
 	WARN_ON(size & ~PAGE_MASK);
@@ -210,8 +210,8 @@ void __iounmap_at(void *ea, unsigned long size)
 	unmap_kernel_range((unsigned long)ea, size);
 }
 
-void __iomem * __ioremap_caller(phys_addr_t addr, unsigned long size,
-				unsigned long flags, void *caller)
+void __iomem *__ioremap_caller(phys_addr_t addr, resource_size_t size,
+			       unsigned long flags, void *caller)
 {
 	phys_addr_t paligned;
 	void __iomem *ret;
@@ -255,13 +255,13 @@ void __iomem * __ioremap_caller(phys_addr_t addr, unsigned long size,
 	return ret;
 }
 
-void __iomem * __ioremap(phys_addr_t addr, unsigned long size,
-			 unsigned long flags)
+void __iomem *__ioremap(phys_addr_t addr, resource_size_t size,
+			unsigned long flags)
 {
 	return __ioremap_caller(addr, size, flags, __builtin_return_address(0));
 }
 
-void __iomem * ioremap(phys_addr_t addr, unsigned long size)
+void __iomem *ioremap(phys_addr_t addr, resource_size_t size)
 {
 	unsigned long flags = _PAGE_NO_CACHE | _PAGE_GUARDED;
 	void *caller = __builtin_return_address(0);
@@ -271,7 +271,7 @@ void __iomem * ioremap(phys_addr_t addr, unsigned long size)
 	return __ioremap_caller(addr, size, flags, caller);
 }
 
-void __iomem * ioremap_wc(phys_addr_t addr, unsigned long size)
+void __iomem *ioremap_wc(phys_addr_t addr, resource_size_t size)
 {
 	unsigned long flags = _PAGE_NO_CACHE;
 	void *caller = __builtin_return_address(0);
@@ -281,8 +281,8 @@ void __iomem * ioremap_wc(phys_addr_t addr, unsigned long size)
 	return __ioremap_caller(addr, size, flags, caller);
 }
 
-void __iomem * ioremap_prot(phys_addr_t addr, unsigned long size,
-			     unsigned long flags)
+void __iomem *ioremap_prot(phys_addr_t addr, resource_size_t size,
+			   unsigned long flags)
 {
 	void *caller = __builtin_return_address(0);
 
