if(likely(translation_exists(vma, vmaddr)))
if (likely(translation_exists(vma, vmaddr, pfn)))
flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long pfn){	BUG_ON(!vma->vm_mm->context);	if(likely(translation_exists(vma, vmaddr)))		__flush_cache_page(vma, vmaddr);}