tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   5be860bfc73408bc1a8af9167955e480ecebba84
commit: 6508a50fe84f9858e8b59b53dce3847aaeeab744 [10545/12617] media: dvb: add DVB-C2 and DVB-S2X parameter values
reproduce:
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=6508a50fe84f9858e8b59b53dce3847aaeeab744
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 6508a50fe84f9858e8b59b53dce3847aaeeab744
        make menuconfig
        # enable CONFIG_COMPILE_TEST, CONFIG_WARN_MISSING_DOCUMENTS, CONFIG_WARN_ABI_ERRORS
        make htmldocs

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

All warnings (new ones prefixed by >>):

>> Documentation/output/frontend.h.rst:6: WARNING: undefined label: fec-1-3 (if the link has no caption the label must precede a section header)
>> Documentation/output/frontend.h.rst:6: WARNING: undefined label: apsk-8-l (if the link has no caption the label must precede a section header)
>> Documentation/output/frontend.h.rst:6: WARNING: undefined label: apsk-64 (if the link has no caption the label must precede a section header)
>> Documentation/output/frontend.h.rst:6: WARNING: undefined label: qam-1024 (if the link has no caption the label must precede a section header)
>> Documentation/output/frontend.h.rst:6: WARNING: undefined label: guard-interval-1-64 (if the link has no caption the label must precede a section header)
>> Documentation/output/frontend.h.rst:6: WARNING: undefined label: rolloff-15 (if the link has no caption the label must precede a section header)
>> Documentation/output/frontend.h.rst:6: WARNING: undefined label: sys-dvbc2 (if the link has no caption the label must precede a section header)

vim +6 Documentation/output/frontend.h.rst

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