Some ep93xx boards use physmap while other ep93xx boards do not.
Currently, whenever you compile in physmap, it initialises itself
unconditionally, which makes it hard to compile multi-machine
kernels for ep93xx.

Teach physmap not to load when the mapping length is zero, and
default the mapping length to zero in Kconfig.


Index: linux-2.6.15/drivers/mtd/maps/Kconfig
===================================================================
--- linux-2.6.15.orig/drivers/mtd/maps/Kconfig
+++ linux-2.6.15/drivers/mtd/maps/Kconfig
@@ -37,7 +37,7 @@ config MTD_PHYSMAP_START
 config MTD_PHYSMAP_LEN
 	hex "Physical length of flash mapping"
 	depends on MTD_PHYSMAP
-	default "0x4000000"
+	default "0x0"
 	help
 	  This is the total length of the mapping of the flash chips on
 	  your particular board. If there is space, or aliases, in the
Index: linux-2.6.15/drivers/mtd/maps/physmap.c
===================================================================
--- linux-2.6.15.orig/drivers/mtd/maps/physmap.c
+++ linux-2.6.15/drivers/mtd/maps/physmap.c
@@ -51,6 +51,9 @@ static int __init init_physmap(void)
 	static const char *rom_probe_types[] = { "cfi_probe", "jedec_probe", "map_rom", NULL };
 	const char **type;
 
+	if (!physmap_map.size)
+		return -EIO;
+
        	printk(KERN_NOTICE "physmap flash device: %lx at %lx\n", physmap_map.size, physmap_map.phys);
 	physmap_map.virt = ioremap(physmap_map.phys, physmap_map.size);