Defined in 5 files as a macro:
- sys/arm64/include/bus.h, line 380 (as a macro)
- sys/mips/include/bus.h, line 359 (as a macro)
- sys/pc98/include/bus.h, line 599 (as a macro)
- sys/powerpc/include/bus.h, line 357 (as a macro)
- sys/x86/include/bus.h, line 1057 (as a macro)