Defined in 5 files as a macro:
- sys/arm/include/bus.h, line 441 (as a macro)
- sys/arm64/include/bus.h, line 421 (as a macro)
- sys/mips/include/bus.h, line 402 (as a macro)
- sys/powerpc/include/bus.h, line 396 (as a macro)
- sys/x86/include/bus.h, line 1090 (as a macro)