swapoff_args
{ AS(swapoff_args), 4, (sy_call_t *)sys_swapoff }, /* 529 = swapoff */
int sys_swapoff (struct sysmsg *sysmsg, const struct swapoff_args *);
struct swapoff_args swapoff;
sys_swapoff(struct sysmsg *sysmsg, const struct swapoff_args *uap)