SKNLGRP_NONE 42 include/linux/sock_diag.h return SKNLGRP_NONE; SKNLGRP_NONE 50 include/linux/sock_diag.h return SKNLGRP_NONE; SKNLGRP_NONE 54 include/linux/sock_diag.h return SKNLGRP_NONE; SKNLGRP_NONE 62 include/linux/sock_diag.h return SKNLGRP_NONE; SKNLGRP_NONE 65 include/linux/sock_diag.h return SKNLGRP_NONE; SKNLGRP_NONE 75 include/linux/sock_diag.h return group != SKNLGRP_NONE && n->diag_nlsk && SKNLGRP_NONE 130 net/core/sock_diag.c WARN_ON(group == SKNLGRP_NONE);