Hi Hans, FYI, the error/warning still remains. tree: git://git.ragnatech.se/linux media-next head: 4c6e0976295add7f0ed94d276c04a3d6f1ea8f83 commit: b2cd0b31ed896c1a6a423019ed3633e890a7f997 [68/328] media: rtl2832_sdr/vivid/airspy/hackrf/msi2500: drop memset of fmt.sdr.reserved config: x86_64-randconfig-g001-20200309 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): git remote add ragnatech git://git.ragnatech.se/linux git fetch --no-tags ragnatech media-next git checkout b2cd0b31ed896c1a6a423019ed3633e890a7f997 # 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 warnings (new ones prefixed by >>): drivers/media/dvb-frontends/rtl2832_sdr.o: warning: objtool: rtl2832_sdr_try_fmt_sdr_cap() falls through to next function rtl2832_sdr_start_streaming.cold() --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org