[PATCH] ARM: 2747/1: allow platforms to provide their own iomap implementation

Patch from Lennert Buytenhek

This patch conditionalises the io{read,write}{8,16,32} defines and the
prototypes for ioport_map/ioport_unmap in asm-arm/io.h on ioread8 not
already having been defined. This is done so that platforms can provide
their own implementation of the iomap API, ixp2000 for example needs
this.

Signed-off-by: Lennert Buytenhek <[e-mail]>
Signed-off-by: Deepak Saxena
Signed-off-by: Russell King <[e-mail]>

include/asm-arm/io.h

···
 /*
  * io{read,write}{8,16,32} macros
  */
+#ifndef ioread8
 #define ioread8(p)	({ unsigned int __v = __raw_readb(p); __v; })
 #define ioread16(p)	({ unsigned int __v = le16_to_cpu(__raw_readw(p)); __v; })
 #define ioread32(p)	({ unsigned int __v = le32_to_cpu(__raw_readl(p)); __v; })
···
 
 extern void __iomem *ioport_map(unsigned long port, unsigned int nr);
 extern void ioport_unmap(void __iomem *addr);
+#endif
 
 struct pci_dev;