Hi Wolfgang, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 178e834c47b0d01352c48730235aae69898fbc02 commit: 6cdeaed3b1420bd2569891be0c4123ff59628e9e media: dvb_usb_pctv452e: module refcount changes were unbalanced date: 9 weeks ago config: x86_64-randconfig-s4-02131647 (attached as .config) compiler: gcc-7 (Debian 7.3.0-1) 7.3.0 reproduce: git checkout 6cdeaed3b1420bd2569891be0c4123ff59628e9e # save the attached .config to linux build tree make ARCH=x86_64 All errors (new ones prefixed by >>): In file included from drivers/media/usb/dvb-usb/pctv452e.c:20:0: drivers/media/usb/dvb-usb/pctv452e.c: In function 'pctv452e_frontend_attach': >> drivers/media/dvb-frontends/stb0899_drv.h:151:36: error: weak declaration of 'stb0899_attach' being applied to a already existing, static definition static inline struct dvb_frontend *stb0899_attach(struct stb0899_config *config, ^~~~~~~~~~~~~~ vim +/stb0899_attach +151 drivers/media/dvb-frontends/stb0899_drv.h ae9902da9 drivers/media/dvb/frontends/stb0899_drv.h Manu Abraham 2007-10-08 150 ae9902da9 drivers/media/dvb/frontends/stb0899_drv.h Manu Abraham 2007-10-08 @151 static inline struct dvb_frontend *stb0899_attach(struct stb0899_config *config, ae9902da9 drivers/media/dvb/frontends/stb0899_drv.h Manu Abraham 2007-10-08 152 struct i2c_adapter *i2c) ae9902da9 drivers/media/dvb/frontends/stb0899_drv.h Manu Abraham 2007-10-08 153 { ae9902da9 drivers/media/dvb/frontends/stb0899_drv.h Manu Abraham 2007-10-08 154 printk(KERN_WARNING "%s: Driver disabled by Kconfig\n", __func__); ae9902da9 drivers/media/dvb/frontends/stb0899_drv.h Manu Abraham 2007-10-08 155 return NULL; ae9902da9 drivers/media/dvb/frontends/stb0899_drv.h Manu Abraham 2007-10-08 156 } ae9902da9 drivers/media/dvb/frontends/stb0899_drv.h Manu Abraham 2007-10-08 157 :::::: The code at line 151 was first introduced by commit :::::: ae9902da96b4d2d82707706c7fbc93a8e501dde8 V4L/DVB (9417): DVB_ATTACH for STB0899, STB6100, TDA8261 :::::: TO: Manu Abraham :::::: CC: Mauro Carvalho Chehab --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation