linux/Documentation/Kconfig
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Prefs
   1config WARN_MISSING_DOCUMENTS
   2
   3        bool "Warn if there's a missing documentation file"
   4        depends on COMPILE_TEST
   5        help
   6           It is not uncommon that a document gets renamed.
   7           This option makes the Kernel to check for missing dependencies,
   8           warning when something is missing. Works only if the Kernel
   9           is built from a git tree.
  10
  11           If unsure, select 'N'.
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