--- /usr/src/sys/kern/subr_witness.c	Thu Sep 20 22:38:43 2007
+++ sys/kern/subr_witness.c	Sat Nov 24 05:32:32 2007
@@ -404,6 +404,7 @@
 #endif
 	{ "rm.mutex_mtx", &lock_class_mtx_spin },
 	{ "sio", &lock_class_mtx_spin },
+	{ "scrlock", &lock_class_mtx_spin },
 #ifdef __i386__
 	{ "cy", &lock_class_mtx_spin },
 #endif