Merge tag 'docs-6.0' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "This was a moderately busy cycle for documentation, but nothing
  all that earth-shaking:

   - More Chinese translations, and an update to the Italian
     translations.

     The Japanese, Korean, and traditional Chinese translations
     are more-or-less unmaintained at this point, instead.

   - Some build-system performance improvements.

   - The removal of the archaic submitting-drivers.rst document,
     with the movement of what useful material that remained into
     other docs.

   - Improvements to sphinx-pre-install to, hopefully, give more
     useful suggestions.

   - A number of build-warning fixes

  Plus the usual collection of typo fixes, updates, and more"

* tag 'docs-6.0' of git://git.lwn.net/linux: (92 commits)
  docs: efi-stub: Fix paths for x86 / arm stubs
  Docs/zh_CN: Update the translation of sched-stats to 5.19-rc8
  Docs/zh_CN: Update the translation of pci to 5.19-rc8
  Docs/zh_CN: Update the translation of pci-iov-howto to 5.19-rc8
  Docs/zh_CN: Update the translation of usage to 5.19-rc8
  Docs/zh_CN: Update the translation of testing-overview to 5.19-rc8
  Docs/zh_CN: Update the translation of sparse to 5.19-rc8
  Docs/zh_CN: Update the translation of kasan to 5.19-rc8
  Docs/zh_CN: Update the translation of iio_configfs to 5.19-rc8
  doc:it_IT: align Italian documentation
  docs: Remove spurious tag from admin-guide/mm/overcommit-accounting.rst
  Documentation: process: Update email client instructions for Thunderbird
  docs: ABI: correct QEMU fw_cfg spec path
  doc/zh_CN: remove submitting-driver reference from docs
  docs: zh_TW: align to submitting-drivers removal
  docs: zh_CN: align to submitting-drivers removal
  docs: ko_KR: howto: remove reference to removed submitting-drivers
  docs: ja_JP: howto: remove reference to removed submitting-drivers
  docs: it_IT: align to submitting-drivers removal
  docs: process: remove outdated submitting-drivers.rst
  ...

1 files changed, 32 insertions, 24 deletions

diff --git a/Documentation/sphinx/automarkup.py b/Documentation/sphinx/automarkup.py
index cc348b219fca..06b34740bf90 100644
--- a/Documentation/sphinx/automarkup.py
+++ b/Documentation/sphinx/automarkup.py
@@ -121,13 +121,20 @@ def markup_refs(docname, app, node):
     return repl
 
 #
+# Keep track of cross-reference lookups that failed so we don't have to
+# do them again.
+#
+failed_lookups = { }
+def failure_seen(target):
+    return (target) in failed_lookups
+def note_failure(target):
+    failed_lookups[target] = True
+
+#
 # In sphinx3 we can cross-reference to C macro and function, each one with its
 # own C role, but both match the same regex, so we try both.
 #
 def markup_func_ref_sphinx3(docname, app, match):
-    class_str = ['c-func', 'c-macro']
-    reftype_str = ['function', 'macro']
-
     cdom = app.env.domains['c']
     #
     # Go through the dance of getting an xref out of the C domain
@@ -143,27 +150,28 @@ def markup_func_ref_sphinx3(docname, app, match):
 
     if base_target not in Skipnames:
         for target in possible_targets:
-            if target not in Skipfuncs:
-                for class_s, reftype_s in zip(class_str, reftype_str):
-                    lit_text = nodes.literal(classes=['xref', 'c', class_s])
-                    lit_text += target_text
-                    pxref = addnodes.pending_xref('', refdomain = 'c',
-                                                  reftype = reftype_s,
-                                                  reftarget = target, modname = None,
-                                                  classname = None)
-                    #
-                    # XXX The Latex builder will throw NoUri exceptions here,
-                    # work around that by ignoring them.
-                    #
-                    try:
-                        xref = cdom.resolve_xref(app.env, docname, app.builder,
-                                                 reftype_s, target, pxref,
-                                                 lit_text)
-                    except NoUri:
-                        xref = None
-
-                    if xref:
-                        return xref
+            if (target not in Skipfuncs) and not failure_seen(target):
+                lit_text = nodes.literal(classes=['xref', 'c', 'c-func'])
+                lit_text += target_text
+                pxref = addnodes.pending_xref('', refdomain = 'c',
+                                              reftype = 'function',
+                                              reftarget = target,
+                                              modname = None,
+                                              classname = None)
+                #
+                # XXX The Latex builder will throw NoUri exceptions here,
+                # work around that by ignoring them.
+                #
+                try:
+                    xref = cdom.resolve_xref(app.env, docname, app.builder,
+                                             'function', target, pxref,
+                                             lit_text)
+                except NoUri:
+                    xref = None
+
+                if xref:
+                    return xref
+                note_failure(target)
 
     return target_text