+#ifdef BSD_KERNEL_PRIVATE
+int einval(void);
+void nullsys(void);
+int errsys(void);
+int seltrue(dev_t dev, int which, struct proc *p);
+void ttyprintf(struct tty *, const char *, ...) __printflike(2, 3);
+void realitexpire(struct proc *);
+int hzto(struct timeval *tv);
+void tablefull(const char *);
+int kvprintf(char const *, void (*)(int, void*), void *, int,
+ __darwin_va_list);
+void uprintf(const char *, ...) __printflike(1,2);
+int copywithin(void *saddr, void *daddr, size_t len);
+int64_t fulong(user_addr_t addr);
+int sulong(user_addr_t addr, int64_t longword);
+uint64_t fuulong(user_addr_t addr);
+int suulong(user_addr_t addr, uint64_t ulongword);
+int vslock(user_addr_t addr, user_size_t len);
+int vsunlock(user_addr_t addr, user_size_t len, int dirtied);
+int clone_system_shared_regions(int shared_regions_active,
+ int chain_regions,
+ int base_vnode);
+extern kern_return_t bsd_exception(int, mach_exception_data_t codes, int);
+extern void bsdinit_task(void);
+extern void unix_syscall_return(int) __dead2;
+void initclocks(void);
+void startprofclock(struct proc *);
+void stopprofclock(struct proc *);
+void setstatclockrate(int hzrate);
+struct time_value;
+void get_procrustime(struct time_value *tv);
+void load_init_program(struct proc *p);
+void __pthread_testcancel(int presyscall);
+void throttle_info_get_last_io_time(mount_t mp, struct timeval *tv);
+void update_last_io_time(mount_t mp);
+#endif /* BSD_KERNEL_PRIVATE */
+
+#ifdef KERNEL_PRIVATE
+void timeout(void (*)(void *), void *arg, int ticks);
+void timeout_with_leeway(void (*)(void *), void *arg, int ticks, int leeway_ticks);
+void untimeout(void (*)(void *), void *arg);
+int bsd_hostname(char *, int, int*);
+#endif /* KERNEL_PRIVATE */
+
+int nullop(void);
+int nulldev(void);
+int enoioctl(void);
+int enosys(void);
+int enxio(void);
+int eopnotsupp(void);
+void *hashinit(int count, int type, u_long *hashmask);
+void ovbcopy(const void *from, void *to, size_t len);
+int fubyte(user_addr_t addr);
+int fuibyte(user_addr_t addr);
+int subyte(user_addr_t addr, int byte);
+int suibyte(user_addr_t addr, int byte);
+long fuword(user_addr_t addr);
+long fuiword(user_addr_t addr);
+int suword(user_addr_t addr, long word);
+int suiword(user_addr_t addr, long word);
+#define fusize(_a) ((user_size_t)fulong(_a))
+#define susize(_a, _s) sulong((_a), (_s))
+#define fuptr(a) ((user_addr_t)fulong(_a)
+#define suptr(_a, _p) sulong((_a), (_p))
+int useracc(user_addr_t addr, user_size_t len,int prot);
+typedef void (*timeout_fcn_t)(void *);
+void bsd_timeout(void (*)(void *), void *arg, struct timespec * ts);
+void bsd_untimeout(void (*)(void *), void *arg);
+void set_fsblocksize(struct vnode *);
+uint64_t tvtoabstime(struct timeval *);
+uint64_t tstoabstime(struct timespec *);
+void *throttle_info_create(void);
+void throttle_info_mount_ref(mount_t mp, void * throttle_info);
+void throttle_info_mount_rel(mount_t mp);
+void throttle_info_release(void *throttle_info);
+void throttle_info_update(void *throttle_info, int flags);
+uint32_t throttle_lowpri_io(int sleep_amount);
+void throttle_set_thread_io_policy(int policy);
+
+typedef struct __throttle_info_handle *throttle_info_handle_t;
+int throttle_info_ref_by_mask(uint64_t throttle_mask, throttle_info_handle_t *throttle_info_handle);
+void throttle_info_rel_by_mask(throttle_info_handle_t throttle_info_handle);
+void throttle_info_update_by_mask(void *throttle_info_handle, int flags);
+void throttle_info_disable_throttle(int devno, boolean_t isfusion);
+/*
+ * 'throttle_info_handle' acquired via 'throttle_info_ref_by_mask'
+ * 'policy' should be specified as either IOPOL_UTILITY or IPOL_THROTTLE,
+ * all other values will be treated as IOPOL_NORMAL (i.e. no throttling)
+ */
+int throttle_info_io_will_be_throttled(void *throttle_info_handle, int policy);