atomic_swap_ptr
#define atomic_swap_ptr atomic_swap_long
#define atomic_swap_ptr atomic_swap_32
#define atomic_swap_ptr atomic_swap_64
#define atomic_swap_ptr(p, v) \
#define atomic_swap_ptr atomic_swap_64
#define atomic_swap_ptr(p,v) atomic_swap_32((volatile u_int *)(p), v)
#define atomic_swap_ptr atomic_swap_64
#define atomic_swap_ptr ATOMIC_SAN(swap_ptr)