Kernel Crypto

 * @cra_alignmask: Alignment mask for the input and output data buffer. The data
 *           buffer containing the input data for the algorithm must be
 *           aligned to this alignment mask. The data buffer for the
 *           output data must be aligned to this alignment mask. Note that
 *           the Crypto API will do the re-alignment in software, but
 *           only under special conditions and there is a performance hit.
 *           The re-alignment happens at these occasions for different
 *           @cra_u types: cipher -- For both input data and output data
 *           buffer; ahash -- For output hash destination buf; shash --
 *           For output hash destination buf.
 *           This is needed on hardware which is flawed by design and
 *           cannot pick data from arbitrary addresses.