FILE argument missing

Usage:
     kernel-doc [-h] [-v] [-Werror] [-Wall] [-Wreturn] [-Wshort-desc[ription]] [-Wcontents-before-sections]
       [ -man |
         -rst [-sphinx-version VERSION] [-enable-lineno] |
         -none
       ]
       [
         -export |
         -internal |
         [-function NAME] ... |
         [-nosymbol NAME] ...
       ]
       [-no-doc-sections]
       [-export-file FILE] ...
       FILE ...

    Run `kernel-doc -h` for details.

FILE argument missing

Usage:
     kernel-doc [-h] [-v] [-Werror] [-Wall] [-Wreturn] [-Wshort-desc[ription]] [-Wcontents-before-sections]
       [ -man |
         -rst [-sphinx-version VERSION] [-enable-lineno] |
         -none
       ]
       [
         -export |
         -internal |
         [-function NAME] ... |
         [-nosymbol NAME] ...
       ]
       [-no-doc-sections]
       [-export-file FILE] ...
       FILE ...

    Run `kernel-doc -h` for details.