sysctlfn          130 kern/kern_sysctl.c 	sysctlfn *fn;
sysctlfn         1755 kern/vfs_subr.c 	sysctlfn *fn;
sysctlfn          671 sys/sysctl.h   typedef int (sysctlfn)(int *, u_int, void *, size_t *, void *, size_t, struct proc *);