Revision 1.11 of pcppi.c is missing an include for sys/timeout.h, without which leaves sc_bell_timeout without a type, breaking it. Patch is below.
diff -u -r1.11 pcppi.c --- pcppi.c 14 Sep 2014 14:17:25 -0000 1.11 +++ pcppi.c 20 Sep 2014 06:56:13 -0000 @@ -33,6 +33,7 @@ #include <sys/kernel.h> #include <sys/device.h> #include <sys/errno.h> +#include <sys/timeout.h> #include <machine/bus.h> -- FT2(SS) Byron Grobe, USN USS Providence (SSN-719)