*/
#define flush_cache_all() do {} while(0)
#define flush_cache_mm(mm) do {} while(0)
+#define flush_cache_dup_mm(mm) do {} while(0)
#define flush_cache_range(mm, start, end) do {} while(0)
#define flush_cache_page(vma, vmaddr, pfn) do {} while(0)
#define flush_cache_vmap(start, end) do {} while(0)