SSP_HEADER_SIZE_ALIGNED
memcpy(&m->buffer[SSP_HEADER_SIZE_ALIGNED + offset], src, len);
memcpy(dest, &m->buffer[SSP_HEADER_SIZE_ALIGNED + offset], len);
((m)->buffer[SSP_HEADER_SIZE_ALIGNED + (index)])
((m)->buffer[SSP_HEADER_SIZE_ALIGNED + (index)] = val)
&msg->buffer[SSP_HEADER_SIZE_ALIGNED],
&msg->buffer[SSP_HEADER_SIZE_ALIGNED],
msg->buffer = kzalloc(SSP_HEADER_SIZE_ALIGNED + len,