debug0            655 kern/kern_sysctl.c extern struct ctldebug debug0, debug1;
debug0            661 kern/kern_sysctl.c 	&debug0, &debug1, &debug2, &debug3, &debug4,
debug0            466 kern/vfs_syscalls.c struct ctldebug debug0 = { "syncprt", &syncprt };
debug0            656 sys/sysctl.h   extern struct ctldebug debug0, debug1, debug2, debug3, debug4;