jobs_delete_class
static int jobscmd_delete_class(struct jobs_delete_class *);
error = jobscmd_delete_class((struct jobs_delete_class *)addr);
jobscmd_delete_class(struct jobs_delete_class *ap)
#define JOBS_DEL_CLASS _IOW('Q', 8, struct jobs_delete_class)
static int jobs_delete_class(struct classinfo *);
jobs_delete_class,
struct jobs_delete_class class_delete;