Hi Greg, FYI, the error/warning still remains. tree: https://android.googlesource.com/kernel/common android-5.4-stable head: bad091cc4bf33d4eb8086f5761311ceba1e71283 commit: 9c8aa25e2955df58dae59e409ec1bc7f850935d9 [8965/9854] ANDROID: GKI: fix symbol_get/put() build error on arm64 defconfig config: i386-randconfig-a005-20200914 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): git checkout 9c8aa25e2955df58dae59e409ec1bc7f850935d9 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: drivers/i2c/algos/i2c-algo-bit.o: in function `i2c_bit_add_bus': drivers/i2c/algos/i2c-algo-bit.c:685: undefined reference to `i2c_add_adapter' ld: drivers/i2c/algos/i2c-algo-bit.o: in function `i2c_bit_add_numbered_bus': drivers/i2c/algos/i2c-algo-bit.c:691: undefined reference to `i2c_add_numbered_adapter' ld: drivers/media/tuners/tda8290.o: in function `tuner_i2c_xfer_send': ld: drivers/media/tuners/tda8290.o: in function `tda8290_standby': drivers/media/tuners/tda8290.c:468: undefined reference to `i2c_transfer' ld: drivers/media/tuners/tda8290.o: in function `tuner_i2c_xfer_send': ld: drivers/media/tuners/tda8290.o:drivers/media/tuners/tda8290.c:584: more undefined references to `i2c_transfer' follow ld: drivers/media/common/b2c2/flexcop.o: in function `flexcop_pass_dmx_packets': drivers/media/common/b2c2/flexcop.c:173: undefined reference to `dvb_dmx_swfilter_packets' ld: drivers/media/common/b2c2/flexcop.o: in function `flexcop_dvb_exit': drivers/media/common/b2c2/flexcop.c:148: undefined reference to `dvb_net_release' ld: drivers/media/common/b2c2/flexcop.c:155: undefined reference to `dvb_dmxdev_release' ld: drivers/media/common/b2c2/flexcop.c:156: undefined reference to `dvb_dmx_release' ld: drivers/media/common/b2c2/flexcop.c:157: undefined reference to `dvb_unregister_adapter' ld: drivers/media/common/b2c2/flexcop.o: in function `flexcop_dvb_init': drivers/media/common/b2c2/flexcop.c:68: undefined reference to `dvb_register_adapter' ld: drivers/media/common/b2c2/flexcop.c:85: undefined reference to `dvb_dmx_init' ld: drivers/media/common/b2c2/flexcop.c:96: undefined reference to `dvb_dmxdev_init' ld: drivers/media/common/b2c2/flexcop.c:121: undefined reference to `dvb_net_init' ld: drivers/media/common/b2c2/flexcop.o: in function `flexcop_pass_dmx_data': drivers/media/common/b2c2/flexcop.c:167: undefined reference to `dvb_dmx_swfilter' ld: drivers/media/common/b2c2/flexcop.o: in function `flexcop_dvb_init': drivers/media/common/b2c2/flexcop.c:137: undefined reference to `dvb_dmxdev_release' ld: drivers/media/common/b2c2/flexcop.c:139: undefined reference to `dvb_dmx_release' ld: drivers/media/common/b2c2/flexcop.c:141: undefined reference to `dvb_unregister_adapter' ld: drivers/media/common/b2c2/flexcop-fe-tuner.o: in function `flexcop_frontend_init': drivers/media/common/b2c2/flexcop-fe-tuner.c:694: undefined reference to `dvb_frontend_detach' ld: drivers/media/common/b2c2/flexcop-fe-tuner.o: in function `flexcop_frontend_exit': drivers/media/common/b2c2/flexcop-fe-tuner.c:717: undefined reference to `dvb_unregister_frontend' ld: drivers/media/common/b2c2/flexcop-fe-tuner.c:718: undefined reference to `dvb_frontend_detach' ld: drivers/media/common/b2c2/flexcop-fe-tuner.o: in function `flexcop_frontend_init': drivers/media/common/b2c2/flexcop-fe-tuner.c:704: undefined reference to `dvb_register_frontend' ld: drivers/media/common/b2c2/flexcop-fe-tuner.c:706: undefined reference to `dvb_frontend_detach' ld: drivers/media/common/b2c2/flexcop-i2c.o: in function `flexcop_i2c_init': drivers/media/common/b2c2/flexcop-i2c.c:250: undefined reference to `i2c_add_adapter' ld: drivers/media/common/b2c2/flexcop-i2c.c:254: undefined reference to `i2c_add_adapter' ld: drivers/media/common/b2c2/flexcop-i2c.c:258: undefined reference to `i2c_add_adapter' ld: drivers/media/common/b2c2/flexcop-i2c.c:266: undefined reference to `i2c_del_adapter' ld: drivers/media/common/b2c2/flexcop-i2c.c:268: undefined reference to `i2c_del_adapter' ld: drivers/media/common/b2c2/flexcop-i2c.o: in function `flexcop_i2c_exit': drivers/media/common/b2c2/flexcop-i2c.c:275: undefined reference to `i2c_del_adapter' ld: drivers/media/common/b2c2/flexcop-i2c.c:276: undefined reference to `i2c_del_adapter' ld: drivers/media/common/b2c2/flexcop-i2c.c:277: undefined reference to `i2c_del_adapter' git remote add android-common https://android.googlesource.com/kernel/common git fetch --no-tags android-common android-5.4-stable git checkout 9c8aa25e2955df58dae59e409ec1bc7f850935d9 vim +29 drivers/media/tuners/tuner-i2c.h db8a695658cda2 drivers/media/video/tuner-i2c.h Michael Krufky 2007-08-21 23 ceefaf5d8e0441 drivers/media/tuners/tuner-i2c.h Mauro Carvalho Chehab 2015-06-22 24 static inline int tuner_i2c_xfer_send(struct tuner_i2c_props *props, ceefaf5d8e0441 drivers/media/tuners/tuner-i2c.h Mauro Carvalho Chehab 2015-06-22 25 unsigned char *buf, int len) db8a695658cda2 drivers/media/video/tuner-i2c.h Michael Krufky 2007-08-21 26 { db8a695658cda2 drivers/media/video/tuner-i2c.h Michael Krufky 2007-08-21 27 struct i2c_msg msg = { .addr = props->addr, .flags = 0, db8a695658cda2 drivers/media/video/tuner-i2c.h Michael Krufky 2007-08-21 28 .buf = buf, .len = len }; db8a695658cda2 drivers/media/video/tuner-i2c.h Michael Krufky 2007-08-21 @29 int ret = i2c_transfer(props->adap, &msg, 1); db8a695658cda2 drivers/media/video/tuner-i2c.h Michael Krufky 2007-08-21 30 db8a695658cda2 drivers/media/video/tuner-i2c.h Michael Krufky 2007-08-21 31 return (ret == 1) ? len : ret; db8a695658cda2 drivers/media/video/tuner-i2c.h Michael Krufky 2007-08-21 32 } db8a695658cda2 drivers/media/video/tuner-i2c.h Michael Krufky 2007-08-21 33 :::::: The code at line 29 was first introduced by commit :::::: db8a695658cda21eacfa2a5e3b15e8964bfb93ef V4L/DVB (6127): tuner: kill i2c_client interface to tuner sub-drivers :::::: TO: Michael Krufky <mkrufky(a)linuxtv.org&gt; :::::: CC: Mauro Carvalho Chehab <mchehab(a)infradead.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org