ahash_request_flags
ahash_request_set_callback(req, ahash_request_flags(preq),
ahash_request_set_callback(req, ahash_request_flags(preq) & ~mask,
ahash_request_set_callback(req, ahash_request_flags(preq),
(err1 == -EBUSY && (ahash_request_flags(req) &
ahash_request_set_callback(req, ahash_request_flags(old), NULL, NULL);