tree: git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git ti-rt-linux-5.10.y head: 541ec9a6995c3dd881d6f0b63cc714a08ded457d commit: fde8d4e7d0ab83be0e5dd86a0a2bde55781f2161 [7552/10213] media: v4l2-subdev: add subdev-wide state struct config: i386-randconfig-s002-20211207 (https://download.01.org/0day-ci/archive/20211208/202112081946.2klPQ8aO-lk...) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.4-dirty git remote add ti git://git.ti.com/ti-linux-kernel/ti-linux-kernel.git git fetch --no-tags ti ti-rt-linux-5.10.y git checkout fde8d4e7d0ab83be0e5dd86a0a2bde55781f2161 # save the config file to linux build tree mkdir build_dir make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=i386 SHELL=/bin/bash 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 >>): drivers/media/i2c/mt9v111.c: In function '__mt9v111_get_pad_format': 803 | return &cfg->try_fmt; | ^~~ drivers/media/i2c/mt9v111.c:803:11: note: each undeclared identifier is reported only once for each function it appears in vim +/cfg +803 drivers/media/i2c/mt9v111.c aab7ed1c392703 Jacopo Mondi 2018-07-25 791 aab7ed1c392703 Jacopo Mondi 2018-07-25 792 static struct v4l2_mbus_framefmt *__mt9v111_get_pad_format( aab7ed1c392703 Jacopo Mondi 2018-07-25 793 struct mt9v111_dev *mt9v111, fde8d4e7d0ab83 Tomi Valkeinen 2021-07-14 794 struct v4l2_subdev_state *sd_state, aab7ed1c392703 Jacopo Mondi 2018-07-25 795 unsigned int pad, aab7ed1c392703 Jacopo Mondi 2018-07-25 796 enum v4l2_subdev_format_whence which) aab7ed1c392703 Jacopo Mondi 2018-07-25 797 { aab7ed1c392703 Jacopo Mondi 2018-07-25 798 switch (which) { aab7ed1c392703 Jacopo Mondi 2018-07-25 799 case V4L2_SUBDEV_FORMAT_TRY: 484f9b372dd8da Jacopo Mondi 2018-08-07 800 #if IS_ENABLED(CONFIG_VIDEO_V4L2_SUBDEV_API) fde8d4e7d0ab83 Tomi Valkeinen 2021-07-14 801 return v4l2_subdev_get_try_format(&mt9v111->sd, sd_state, pad); aab7ed1c392703 Jacopo Mondi 2018-07-25 802 #else aab7ed1c392703 Jacopo Mondi 2018-07-25 @803 return &cfg->try_fmt; aab7ed1c392703 Jacopo Mondi 2018-07-25 804 #endif aab7ed1c392703 Jacopo Mondi 2018-07-25 805 case V4L2_SUBDEV_FORMAT_ACTIVE: aab7ed1c392703 Jacopo Mondi 2018-07-25 806 return &mt9v111->fmt; aab7ed1c392703 Jacopo Mondi 2018-07-25 807 default: aab7ed1c392703 Jacopo Mondi 2018-07-25 808 return NULL; aab7ed1c392703 Jacopo Mondi 2018-07-25 809 } aab7ed1c392703 Jacopo Mondi 2018-07-25 810 } aab7ed1c392703 Jacopo Mondi 2018-07-25 811 :::::: The code at line 803 was first introduced by commit :::::: aab7ed1c392703604fbdc5bd5005dfb61a0b32f9 media: i2c: Add driver for Aptina MT9V111 :::::: TO: Jacopo Mondi <jacopo+renesas(a)jmondi.org&gt; :::::: CC: Mauro Carvalho Chehab <mchehab+samsung(a)kernel.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org