Hi Hans,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1746f4db513563bb22e0ba0c419d0c90912dfae1
commit: b2cd0b31ed896c1a6a423019ed3633e890a7f997 media: rtl2832_sdr/vivid/airspy/hackrf/msi2500: drop memset of fmt.sdr.reserved
date:   3 months ago
config: x86_64-buildonly-randconfig-r003-20210812 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b2cd0b31ed896c1a6a423019ed3633e890a7f997
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout b2cd0b31ed896c1a6a423019ed3633e890a7f997
        # save the attached .config to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/media/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

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_s_fmt_sdr_cap.cold()
>> drivers/media/dvb-frontends/rtl2832_sdr.o: warning: objtool: rtl2832_sdr_s_fmt_sdr_cap() falls through to next function rtl2832_sdr_set_adc.cold()

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0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org