Merge tag 'docs-4.15-fixes' of git://git.lwn.net/linux

Pull documentation fixes from Jonathan Corbet:
 "A handful of documentation fixes.

  The most significant of these addresses a problem with the new warning
  mode: it can break the build when confronted with a source file
  containing malformed kerneldoc comments"

* tag 'docs-4.15-fixes' of git://git.lwn.net/linux:
  Documentation: fix docs build error after source file removed
  scsi: documentation: Fix case of 'scsi_device' struct mention(s)
  genericirq.rst: Remove :c:func:`...` in code blocks
  dmaengine: doc : Fix warning "Title underline too short" while make xmldocs
  scripts/kernel-doc: Don't fail with status != 0 if error encountered with -none

scripts/kernel-doc

@@ -3248,4 +3248,4 @@ if ($verbose && $warnings) {
   print STDERR "$warnings warnings\n";
 }
 
-exit($errors);
+exit($output_mode eq "none" ? 0 : $errors);