mpi_read_raw_from_sgl
base = mpi_read_raw_from_sgl(req->src, req->src_len);
m = mpi_read_raw_from_sgl(req->src, req->src_len);
c = mpi_read_raw_from_sgl(req->src, req->src_len);
MPI mpi_read_raw_from_sgl(struct scatterlist *sgl, unsigned int len);
EXPORT_SYMBOL_GPL(mpi_read_raw_from_sgl);