Hi Greg, FYI, the error/warning still remains. tree: https://android.googlesource.com/kernel/common android-5.4-stable head: bb168ca1805b33289aae802a940551dec93a24d3 commit: 9c8aa25e2955df58dae59e409ec1bc7f850935d9 [8965/9852] ANDROID: GKI: fix symbol_get/put() build error on arm64 defconfig config: x86_64-randconfig-a016-20200911 (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=x86_64 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': drivers/media/tuners/tuner-i2c.h:29: undefined reference to `i2c_transfer' ld: drivers/media/tuners/tuner-i2c.h:29: undefined reference to `i2c_transfer' ld: drivers/media/tuners/tda8290.o: in function `tda8290_standby': ld: drivers/media/tuners/tda8290.o: in function `tuner_i2c_xfer_send': drivers/media/tuners/tuner-i2c.h:29: undefined reference to `i2c_transfer' ld: drivers/media/tuners/tuner-i2c.h:29: undefined reference to `i2c_transfer' ld: drivers/media/tuners/tda8290.o:drivers/media/tuners/tda8290.c:584: more undefined references to `i2c_transfer' follow 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 +468 drivers/media/tuners/tda8290.c de48eebce8b63d drivers/media/video/tda8290.c Hartmut Hackmann 2005-11-08 454 4e9154b8a77d0f drivers/media/video/tda8290.c Michael Krufky 2007-10-21 455 static void tda8290_standby(struct dvb_frontend *fe) 793cf9e6a54c69 drivers/media/video/tda8290.c Mauro Carvalho Chehab 2005-09-09 456 { 4e9154b8a77d0f drivers/media/video/tda8290.c Michael Krufky 2007-10-21 457 struct tda8290_priv *priv = fe->analog_demod_priv; 4e9154b8a77d0f drivers/media/video/tda8290.c Michael Krufky 2007-10-21 458 8ff230fb4f4881 drivers/media/tuners/tda8290.c Arnd Bergmann 2017-12-11 459 static unsigned char cb1[] = { 0x30, 0xD0 }; 8ff230fb4f4881 drivers/media/tuners/tda8290.c Arnd Bergmann 2017-12-11 460 static unsigned char tda8290_standby[] = { 0x00, 0x02 }; 8ff230fb4f4881 drivers/media/tuners/tda8290.c Arnd Bergmann 2017-12-11 461 static unsigned char tda8290_agc_tri[] = { 0x02, 0x20 }; b208319993ceff drivers/media/video/tda8290.c Michael Krufky 2007-05-29 462 struct i2c_msg msg = {.addr = priv->tda827x_addr, .flags=0, .buf=cb1, .len = 2}; de48eebce8b63d drivers/media/video/tda8290.c Hartmut Hackmann 2005-11-08 463 2f719f7a9aa599 drivers/media/tuners/tda8290.c Ondrej Zary 2013-02-03 464 if (fe->ops.analog_ops.i2c_gate_ctrl) 2f719f7a9aa599 drivers/media/tuners/tda8290.c Ondrej Zary 2013-02-03 465 fe->ops.analog_ops.i2c_gate_ctrl(fe, 1); 8c125f2ceb3ec1 drivers/media/video/tda8290.c Michael Krufky 2007-10-27 466 if (priv->ver & TDA8275A) de48eebce8b63d drivers/media/video/tda8290.c Hartmut Hackmann 2005-11-08 467 cb1[1] = 0x90; db8a695658cda2 drivers/media/video/tda8290.c Michael Krufky 2007-08-21 @468 i2c_transfer(priv->i2c_props.adap, &msg, 1); 2f719f7a9aa599 drivers/media/tuners/tda8290.c Ondrej Zary 2013-02-03 469 if (fe->ops.analog_ops.i2c_gate_ctrl) 2f719f7a9aa599 drivers/media/tuners/tda8290.c Ondrej Zary 2013-02-03 470 fe->ops.analog_ops.i2c_gate_ctrl(fe, 0); db8a695658cda2 drivers/media/video/tda8290.c Michael Krufky 2007-08-21 471 tuner_i2c_xfer_send(&priv->i2c_props, tda8290_agc_tri, 2); db8a695658cda2 drivers/media/video/tda8290.c Michael Krufky 2007-08-21 472 tuner_i2c_xfer_send(&priv->i2c_props, tda8290_standby, 2); 793cf9e6a54c69 drivers/media/video/tda8290.c Mauro Carvalho Chehab 2005-09-09 473 } 793cf9e6a54c69 drivers/media/video/tda8290.c Mauro Carvalho Chehab 2005-09-09 474 :::::: The code at line 468 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