Defined in 2 files as a macro:

• iokit/DriverKit/IOReturn.h, line 180 (as a macro)
• iokit/IOKit/IOReturn.h, line 178 (as a macro)

Referenced in 2 files:

• iokit/Kernel/IOService.cpp, line 7055
• iokit/Kernel/IOUserServer.cpp, line 1413