HASH_MAX_DESCSIZE
BUILD_BUG_ON(HASH_MAX_DESCSIZE > MAX_SYNC_HASH_REQSIZE);
if (crypto_ahash_reqsize(hash) < HASH_MAX_DESCSIZE)
crypto_ahash_set_reqsize(hash, HASH_MAX_DESCSIZE);
if (alg->descsize > HASH_MAX_DESCSIZE)
HASH_MAX_DESCSIZE)
char __##shash##_desc[sizeof(struct shash_desc) + HASH_MAX_DESCSIZE] \