On Wed, Nov 9, 2022, at 15:21, kernel test robot wrote: > tree: > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > master ): > > s390x-linux-ld: DWARF error: could not find abbrev number 4453 > drivers/net/ethernet/renesas/rswitch.o: in function `rswitch_get_ts_info': >>> rswitch.c:(.text+0x2a28): undefined reference to `ptp_clock_index' > s390x-linux-ld: DWARF error: could not find abbrev number 11 > drivers/net/ethernet/renesas/rcar_gen4_ptp.o: in function > `rcar_gen4_ptp_register': >>> rcar_gen4_ptp.c:(.text+0xd6): undefined reference to `ptp_clock_register' > s390x-linux-ld: drivers/net/ethernet/renesas/rcar_gen4_ptp.o: in > function `rcar_gen4_ptp_unregister': >>> rcar_gen4_ptp.c:(.text+0x198): undefined reference to `ptp_clock_unregister' This usually means the driver needs an extra Kconfig dependency: depends on PTP_1588_CLOCK_OPTIONAL
