PLX_REG_ALT_MBOX 312 drivers/staging/comedi/drivers/plx9080.h #define PLX_REG_ALT_MBOX0 PLX_REG_ALT_MBOX(0) PLX_REG_ALT_MBOX 313 drivers/staging/comedi/drivers/plx9080.h #define PLX_REG_ALT_MBOX1 PLX_REG_ALT_MBOX(1)