diff --git a/arch/alpha/kernel/sys_nautilus.c b/arch/alpha/kernel/sys_nautilus.c
index 1d4aabf..891bd27 100644
--- a/arch/alpha/kernel/sys_nautilus.c
+++ b/arch/alpha/kernel/sys_nautilus.c
@@ -238,8 +238,8 @@ nautilus_init_pci(void)
 	if (pci_mem < memtop)
 		memtop = pci_mem;
 	if (memtop > alpha_mv.min_mem_address) {
-		free_reserved_area((unsigned long)__va(alpha_mv.min_mem_address),
-				   (unsigned long)__va(memtop), 0, NULL);
+		free_reserved_area(__va(alpha_mv.min_mem_address),
+				   __va(memtop), 0, NULL);
 		printk("nautilus_init_pci: %ldk freed\n",
 			(memtop - alpha_mv.min_mem_address) >> 10);
 	}
diff --git a/arch/alpha/mm/init.c b/arch/alpha/mm/init.c
index 0ba85ee..d54848d 100644
--- a/arch/alpha/mm/init.c
+++ b/arch/alpha/mm/init.c
@@ -326,6 +326,6 @@ free_initmem(void)
 void
 free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index 4a17736..dce02e4 100644
--- a/arch/arc/mm/init.c
+++ b/arch/arc/mm/init.c
@@ -152,7 +152,7 @@ void __init_refok free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void __init free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
 
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 9a5cdc0..59d6f76 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -744,7 +744,7 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 {
 	if (!keep_initrd) {
 		poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
-		free_reserved_area(start, end, 0, "initrd");
+		free_reserved_area((void *)start, (void *)end, 0, "initrd");
 	}
 }
 
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index f497ca7..6041e40 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -398,7 +398,7 @@ void free_initrd_mem(unsigned long start, unsigned long end)
 {
 	if (!keep_initrd) {
 		poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
-		free_reserved_area(start, end, 0, "initrd");
+		free_reserved_area((void *)start, (void *)end, 0, "initrd");
 	}
 }
 
diff --git a/arch/avr32/mm/init.c b/arch/avr32/mm/init.c
index e66e840..5a79fa0 100644
--- a/arch/avr32/mm/init.c
+++ b/arch/avr32/mm/init.c
@@ -154,6 +154,6 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
diff --git a/arch/blackfin/mm/init.c b/arch/blackfin/mm/init.c
index 82d01a7..8e9eab2 100644
--- a/arch/blackfin/mm/init.c
+++ b/arch/blackfin/mm/init.c
@@ -133,7 +133,7 @@ void __init mem_init(void)
 void __init free_initrd_mem(unsigned long start, unsigned long end)
 {
 #ifndef CONFIG_MPU
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 #endif
 }
 #endif
diff --git a/arch/c6x/mm/init.c b/arch/c6x/mm/init.c
index a9fcd89..97914e5 100644
--- a/arch/c6x/mm/init.c
+++ b/arch/c6x/mm/init.c
@@ -77,7 +77,7 @@ void __init mem_init(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void __init free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
 
diff --git a/arch/frv/mm/init.c b/arch/frv/mm/init.c
index dee354f..a67f3a5 100644
--- a/arch/frv/mm/init.c
+++ b/arch/frv/mm/init.c
@@ -173,6 +173,6 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void __init free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 } /* end free_initrd_mem() */
 #endif
diff --git a/arch/h8300/mm/init.c b/arch/h8300/mm/init.c
index ff349d7..57e03c5 100644
--- a/arch/h8300/mm/init.c
+++ b/arch/h8300/mm/init.c
@@ -161,7 +161,7 @@ void __init mem_init(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
 
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index d1fe4b4..da568c2 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -154,8 +154,7 @@ ia64_init_addr_space (void)
 void
 free_initmem (void)
 {
-	free_reserved_area((unsigned long)ia64_imva(__init_begin),
-			   (unsigned long)ia64_imva(__init_end),
+	free_reserved_area(ia64_imva(__init_begin), ia64_imva(__init_end),
 			   0, "unused kernel");
 }
 
diff --git a/arch/m32r/mm/init.c b/arch/m32r/mm/init.c
index ab4cbce..d80412d 100644
--- a/arch/m32r/mm/init.c
+++ b/arch/m32r/mm/init.c
@@ -191,6 +191,6 @@ void free_initmem(void)
  *======================================================================*/
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
diff --git a/arch/m68k/mm/init.c b/arch/m68k/mm/init.c
index 1af2ca3..95de725 100644
--- a/arch/m68k/mm/init.c
+++ b/arch/m68k/mm/init.c
@@ -202,6 +202,6 @@ void __init mem_init(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
diff --git a/arch/metag/mm/init.c b/arch/metag/mm/init.c
index d05b845..5e2238d 100644
--- a/arch/metag/mm/init.c
+++ b/arch/metag/mm/init.c
@@ -414,7 +414,8 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, POISON_FREE_INITMEM, "initrd");
+	free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,
+			   "initrd");
 }
 #endif
 
diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index b38ae3a..d7b8ada 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -235,7 +235,7 @@ void __init setup_memory(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
 
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 9b973e0..268f2a9 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -440,7 +440,8 @@ void free_init_pages(const char *what, unsigned long begin, unsigned long end)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, POISON_FREE_INITMEM, "initrd");
+	free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,
+			   "initrd");
 }
 #endif
 
diff --git a/arch/mn10300/mm/init.c b/arch/mn10300/mm/init.c
index 5a8ace6..e19049d 100644
--- a/arch/mn10300/mm/init.c
+++ b/arch/mn10300/mm/init.c
@@ -152,6 +152,7 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, POISON_FREE_INITMEM, "initrd");
+	free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,
+			   "initrd");
 }
 #endif
diff --git a/arch/openrisc/mm/init.c b/arch/openrisc/mm/init.c
index b3cbc67..ab11332 100644
--- a/arch/openrisc/mm/init.c
+++ b/arch/openrisc/mm/init.c
@@ -261,7 +261,7 @@ void __init mem_init(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
 
diff --git a/arch/parisc/mm/init.c b/arch/parisc/mm/init.c
index 1c96564..8fa4183 100644
--- a/arch/parisc/mm/init.c
+++ b/arch/parisc/mm/init.c
@@ -1101,6 +1101,7 @@ void flush_tlb_all(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	num_physpages += free_reserved_area(start, end, 0, "initrd");
+	num_physpages += free_reserved_area((void *)start, (void *)end, 0,
+					    "initrd");
 }
 #endif
diff --git a/arch/powerpc/kernel/kvm.c b/arch/powerpc/kernel/kvm.c
index 6782221..5e4830a 100644
--- a/arch/powerpc/kernel/kvm.c
+++ b/arch/powerpc/kernel/kvm.c
@@ -756,7 +756,7 @@ static __init void kvm_free_tmp(void)
 	end = (ulong)&kvm_tmp[ARRAY_SIZE(kvm_tmp)] & PAGE_MASK;
 
 	/* Free the tmp space we don't need */
-	free_reserved_area(start, end, 0, NULL);
+	free_reserved_area((void *)start, (void *)end, 0, NULL);
 }
 
 static int __init kvm_guest_init(void)
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 0988a26..347c5b1 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -407,7 +407,7 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void __init free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
 
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 89ebae4..0878c89 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -172,7 +172,8 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void __init free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, POISON_FREE_INITMEM, "initrd");
+	free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,
+			   "initrd");
 }
 #endif
 
diff --git a/arch/score/mm/init.c b/arch/score/mm/init.c
index d8f988a..3d79ecb 100644
--- a/arch/score/mm/init.c
+++ b/arch/score/mm/init.c
@@ -110,7 +110,8 @@ void __init mem_init(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, POISON_FREE_INITMEM, "initrd");
+	free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,
+			   "initrd");
 }
 #endif
 
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index 20f9ead..b892a9b 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -505,7 +505,7 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
 
diff --git a/arch/sparc/mm/init_32.c b/arch/sparc/mm/init_32.c
index af472cf..d5f9c02 100644
--- a/arch/sparc/mm/init_32.c
+++ b/arch/sparc/mm/init_32.c
@@ -372,8 +372,8 @@ void free_initmem (void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	num_physpages += free_reserved_area(start, end, POISON_FREE_INITMEM,
-					    "initrd");
+	num_physpages += free_reserved_area((void *)start, (void *)end,
+					    POISON_FREE_INITMEM, "initrd");
 }
 #endif
 
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c
index a717199..a54cdcd 100644
--- a/arch/sparc/mm/init_64.c
+++ b/arch/sparc/mm/init_64.c
@@ -2124,8 +2124,8 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	num_physpages += free_reserved_area(start, end, POISON_FREE_INITMEM,
-					    "initrd");
+	num_physpages += free_reserved_area((void *)start, (void *)end,
+					    POISON_FREE_INITMEM, "initrd");
 }
 #endif
 
diff --git a/arch/um/kernel/mem.c b/arch/um/kernel/mem.c
index 9df292b..2aa7a24 100644
--- a/arch/um/kernel/mem.c
+++ b/arch/um/kernel/mem.c
@@ -244,7 +244,7 @@ void free_initmem(void)
 #ifdef CONFIG_BLK_DEV_INITRD
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
-	free_reserved_area(start, end, 0, "initrd");
+	free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
 
diff --git a/arch/unicore32/mm/init.c b/arch/unicore32/mm/init.c
index 63df12d..220755c 100644
--- a/arch/unicore32/mm/init.c
+++ b/arch/unicore32/mm/init.c
@@ -486,7 +486,7 @@ static int keep_initrd;
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
 	if (!keep_initrd)
-		free_reserved_area(start, end, 0, "initrd");
+		free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 
 static int __init keepinitrd_setup(char *__unused)
diff --git a/arch/xtensa/mm/init.c b/arch/xtensa/mm/init.c
index bba125b..4d658ef 100644
--- a/arch/xtensa/mm/init.c
+++ b/arch/xtensa/mm/init.c
@@ -214,7 +214,7 @@ extern int initrd_is_mapped;
 void free_initrd_mem(unsigned long start, unsigned long end)
 {
 	if (initrd_is_mapped)
-		free_reserved_area(start, end, 0, "initrd");
+		free_reserved_area((void *)start, (void *)end, 0, "initrd");
 }
 #endif
 
diff --git a/include/linux/mm.h b/include/linux/mm.h
index e0c8528..771769f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1307,7 +1307,7 @@ extern void free_initmem(void);
  * "poison" if it's non-zero.
  * Return pages freed into the buddy system.
  */
-extern unsigned long free_reserved_area(unsigned long start, unsigned long end,
+extern unsigned long free_reserved_area(void *start, void *end,
 					int poison, char *s);
 #ifdef	CONFIG_HIGHMEM
 /*
@@ -1351,8 +1351,7 @@ static inline unsigned long free_initmem_default(int poison)
 {
 	extern char __init_begin[], __init_end[];
 
-	return free_reserved_area(PAGE_ALIGN((unsigned long)&__init_begin) ,
-				  ((unsigned long)&__init_end) & PAGE_MASK,
+	return free_reserved_area(&__init_begin, &__init_end,
 				  poison, "unused kernel");
 }
 
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 7c39893..39f66e7 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5231,25 +5231,26 @@ early_param("movablecore", cmdline_parse_movablecore);
 
 #endif /* CONFIG_HAVE_MEMBLOCK_NODE_MAP */
 
-unsigned long free_reserved_area(unsigned long start, unsigned long end,
-				 int poison, char *s)
+unsigned long free_reserved_area(void *start, void *end, int poison, char *s)
 {
-	unsigned long pages, pos;
+	void *pos;
+	unsigned long pages = 0;
 
-	pos = start = PAGE_ALIGN(start);
-	end &= PAGE_MASK;
-	for (pages = 0; pos < end; pos += PAGE_SIZE, pages++) {
+	start = (void *)PAGE_ALIGN((unsigned long)start);
+	end = (void *)((unsigned long)end & PAGE_MASK);
+	for (pos = start; pos < end; pos += PAGE_SIZE, pages++) {
 		if (poison)
-			memset((void *)pos, poison, PAGE_SIZE);
-		free_reserved_page(virt_to_page((void *)pos));
+			memset(pos, poison, PAGE_SIZE);
+		free_reserved_page(virt_to_page(pos));
 	}
 
 	if (pages && s)
-		pr_info("Freeing %s memory: %ldK (%lx - %lx)\n",
+		pr_info("Freeing %s memory: %ldK (%p - %p)\n",
 			s, pages << (PAGE_SHIFT - 10), start, end);
 
 	return pages;
 }
+EXPORT_SYMBOL(free_reserved_area);
 
 #ifdef	CONFIG_HIGHMEM
 void free_highmem_page(struct page *page)
