IO_SPACE_LIMIT 334 arch/x86/include/asm/io.h #define IO_SPACE_LIMIT 0xffff IO_SPACE_LIMIT 267 include/asm-generic/io.h #ifndef IO_SPACE_LIMIT IO_SPACE_LIMIT 334 include/asm-generic/io.h return PCI_IOBASE + (port & IO_SPACE_LIMIT);