[ARM PATCH] 2131/1: Add _iomem to the IO string functions

Patch from Ben Dooks

This patch stops mtd from generating problems of
casting pointers to ints, due to the memcpy_fromio
and related functions all taking `unsigned long`
for their IO addresses.

Replace `unsigned long` with `void __iomem *`

Compiled clean on arch-s3c2410

Signed-off-by: Ben Dooks 

arch/arm/kernel/io.c

@@ -7,7 +7,7 @@
  * Copy data from IO memory space to "real" memory space.
  * This needs to be optimized.
  */
-void _memcpy_fromio(void *to, unsigned long from, size_t count)
+void _memcpy_fromio(void *to, void __iomem *from, size_t count)
 {
 	unsigned char *t = to;
 	while (count) {
@@ -22,7 +22,7 @@ void _memcpy_fromio(void *to, unsigned long from, size_t count)
  * Copy data from "real" memory space to IO memory space.
  * This needs to be optimized.
  */
-void _memcpy_toio(unsigned long to, const void *from, size_t count)
+void _memcpy_toio(void __iomem *to, const void *from, size_t count)
 {
 	const unsigned char *f = from;
 	while (count) {
@@ -37,7 +37,7 @@ void _memcpy_toio(unsigned long to, const void *from, size_t count)
  * "memset" on IO memory space.
  * This needs to be optimized.
  */
-void _memset_io(unsigned long dst, int c, size_t count)
+void _memset_io(void __iomem *dst, int c, size_t count)
 {
 	while (count) {
 		count--;

include/asm-arm/io.h

@@ -16,6 +16,7 @@
  *  04-Apr-1999	PJB	Added check_signature.
  *  12-Dec-1999	RMK	More cleanups
  *  18-Jun-2000 RMK	Removed virt_to_* and friends definitions
+ *  05-Oct-2004 BJD     Moved memory string functions to use void __iomem
  */
 #ifndef __ASM_ARM_IO_H
 #define __ASM_ARM_IO_H
@@ -131,9 +132,9 @@ extern void __readwrite_bug(const char *fn);
 /*
  * String version of IO memory access ops:
  */
-extern void _memcpy_fromio(void *, unsigned long, size_t);
-extern void _memcpy_toio(unsigned long, const void *, size_t);
-extern void _memset_io(unsigned long, int, size_t);
+extern void _memcpy_fromio(void *, void __iomem *, size_t);
+extern void _memcpy_toio(void __iomem *, const void *, size_t);
+extern void _memset_io(void __iomem *, int, size_t);
 
 /*
  *  Memory access primitives