crypto_acomp_reqsize
if (crypto_acomp_reqsize(fb) > MAX_SYNC_COMP_REQSIZE)
sizeof(struct acomp_req) + crypto_acomp_reqsize(ctx->ftfm));
sizeof(struct acomp_req) + crypto_acomp_reqsize(ctx->ftfm));
len = ALIGN(sizeof(*req) + crypto_acomp_reqsize(tfm), CRYPTO_MINALIGN);
len = ALIGN(sizeof(*req) + crypto_acomp_reqsize(tfm), CRYPTO_MINALIGN);