__invalidate_dcache_range
extern void __invalidate_dcache_range(unsigned long, unsigned long);
# define __flush_invalidate_dcache_range(p,s) __invalidate_dcache_range(p,s)
do_cache_op(paddr, size, __invalidate_dcache_range);
__invalidate_dcache_range((unsigned long)page_address(page), size);
__invalidate_dcache_range(fd->addr1, fd->addr2);