IMS_ENABLE_MASK  2744 dev/pci/if_em.c 	E1000_WRITE_REG(&sc->hw, IMS, (IMS_ENABLE_MASK));
IMS_ENABLE_MASK  2989 dev/pci/if_em_hw.c                 E1000_WRITE_REG(hw, IMS, IMS_ENABLE_MASK);