copy_hash
dd->pdata->copy_hash(req, 0);
dd->pdata->copy_hash(req, 1);
.copy_hash = omap_sham_copy_hash_omap2,
.copy_hash = omap_sham_copy_hash_omap4,
.copy_hash = omap_sham_copy_hash_omap4,
void (*copy_hash)(struct ahash_request *req, int out);
*filter_hash = copy_hash(func_hash->filter_hash);
*notrace_hash = copy_hash(func_hash->notrace_hash);