flush_cache_pages
void flush_cache_pages(struct vm_area_struct *vma, unsigned long user_addr,
#define flush_cache_page(vma, addr, pfn) flush_cache_pages(vma, addr, pfn, 1)
flush_cache_pages(vma, start, pfn, nr);
flush_cache_pages(vma, vma->vm_start, vma->vm_end);
flush_cache_pages(vma, start & PAGE_MASK, end);