Modify /kernel_source/script/Makefile.modpost
Set KBUILD_MODPOST_WARN =1 to solved ERROR .
ERROR: "ifx_mei_atm_showtime_check" [drivers/net/ifxmips_ppa/platform/vr9/e5/ifxmips_ppa_datapath_vr9_e5.ko] undefined!
ERROR: "ifx_mei_atm_showtime_exit" [drivers/net/ifxmips_ppa/platform/vr9/e5/ifxmips_ppa_datapath_vr9_e5.ko] undefined!
ERROR: "ifx_mei_atm_showtime_enter" [drivers/net/ifxmips_ppa/platform/vr9/e5/ifxmips_ppa_datapath_vr9_e5.ko] undefined!
ERROR: "ifx_mei_atm_showtime_check" [drivers/net/ifxmips_ppa/platform/vr9/a5/ifxmips_ppa_datapath_vr9_a5.ko] undefined!
ERROR: "ifx_mei_atm_showtime_exit" [drivers/net/ifxmips_ppa/platform/vr9/a5/ifxmips_ppa_datapath_vr9_a5.ko] undefined!
ERROR: "ifx_mei_atm_showtime_enter" [drivers/net/ifxmips_ppa/platform/vr9/a5/ifxmips_ppa_datapath_vr9_a5.ko] undefined!