rtm_fmask         409 net/rtsock.c   			if (rtm->rtm_fmask & RTF_FMASK)
rtm_fmask         411 net/rtsock.c   				    ~rtm->rtm_fmask) |
rtm_fmask         412 net/rtsock.c   				    (rtm->rtm_flags & rtm->rtm_fmask);