crypto_scomp_alg
struct scomp_alg *alg = crypto_scomp_alg(__crypto_scomp_tfm(tfm));
struct crypto_acomp_stream *stream = crypto_acomp_lock_stream_bh(&crypto_scomp_alg(scomp)->streams);
return crypto_scomp_alg(tfm)->compress(tfm, src, slen, dst, dlen, ctx);
return crypto_scomp_alg(tfm)->decompress(tfm, src, slen, dst, dlen,