CTCM_ID_SIZE
scnprintf(ch->id, CTCM_ID_SIZE, "ch-%s", dev_name(&cdev->dev));
if (*c && (!strncmp((*c)->id, ch->id, CTCM_ID_SIZE))) {
char read_id[CTCM_ID_SIZE];
char write_id[CTCM_ID_SIZE];
scnprintf(read_id, CTCM_ID_SIZE, "ch-%s", dev_name(&cdev0->dev));
scnprintf(write_id, CTCM_ID_SIZE, "ch-%s", dev_name(&cdev1->dev));
char chid[CTCM_ID_SIZE];
while (ch && (strncmp(ch->id, id, CTCM_ID_SIZE) || (ch->type != type)))
char id[CTCM_ID_SIZE];