extern unsigned long ioremap_bot;
extern unsigned long __max_low_memory;
-extern unsigned long __initial_memory_limit;
+extern phys_addr_t __initial_memory_limit_addr;
extern unsigned long total_memory;
extern unsigned long total_lowmem;
+extern phys_addr_t memstart_addr;
+extern phys_addr_t lowmem_end_addr;
/* ...and now those things that may be slightly different between processor
* architectures. -- Dan