diff --git a/devel/Makefile.am b/devel/Makefile.am
index edb113cd7a..e1dc96d8b4 100644
--- a/devel/Makefile.am
+++ b/devel/Makefile.am
@@ -1,67 +1,68 @@
 #
-# Copyright 2020 the Pacemaker project contributors
+# Copyright 2020-2021 the Pacemaker project contributors
 #
 # The version control history for this file may have further details.
 #
 # This source code is licensed under the GNU General Public License version 2
 # or later (GPLv2+) WITHOUT ANY WARRANTY.
 #
 
 # Coccinelle is a tool that takes special patch-like files (called semantic patches) and
 # applies them throughout a source tree.  This is useful when refactoring, changing APIs,
 # catching dangerous or incorrect code, and other similar tasks.  It's not especially
 # easy to write a semantic patch but most users should only be concerned about running
 # the target and inspecting the results.
 #
 # Documentation (including examples, which are the most useful):
 #     https://coccinelle.gitlabpages.inria.fr/website/docs/
 #
 # Run the "make cocci" target to just output what would be done, or "make cocci-inplace"
 # to apply the changes to the source tree.
 #
 # COCCI_FILES may be set on the command line, if you want to test just a single file
 # while it's under development.  Otherwise, it is a list of all the files that are ready
 # to be run.
 #
 # ref-passed-variables-inited.cocci seems to be returning some false positives around
 # GHashTableIters, so it is disabled for the moment.
 COCCI_FILES ?=	coccinelle/string-any-of.cocci			\
 		coccinelle/string-empty.cocci			\
 		coccinelle/string-null-matches.cocci		\
 		coccinelle/use-func.cocci
 
 
 dist_noinst_SCRIPTS	= coccinelle/test/testrunner.sh
 EXTRA_DIST		= README gdbhelpers $(COCCI_FILES)		\
 			  coccinelle/ref-passed-variables-inited.cocci	\
+			  coccinelle/rename-fn.cocci			\
 			  coccinelle/string-replacements.cocci		\
 			  coccinelle/test/ref-passed-variables-inited.input.c \
 			  coccinelle/test/ref-passed-variables-inited.output
 
 # Any file in this list is allowed to use any of the pcmk__ internal functions.
 # Coccinelle can use any transformation that depends on "internal" to rewrite
 # code to use the internal functions.
 MAY_USE_INTERNAL_FILES = $(shell find .. -path "../lib/*.c" -o -path "../tools/*.c" -o -path "../daemons/*.c" -o -path '../include/pcmki/*h' -o -name '*internal.h')
 
 # And then any file in this list is public API, which may not use internal
 # functions.  Thus, only those transformations that do not depend on "internal"
 # may be applied.
 OTHER_FILES = $(shell find ../include -name '*h' -a \! -name '*internal.h' -a \! -path '../include/pcmki/*')
 
 cocci:
 	-for cf in $(COCCI_FILES); do \
 		for f in $(MAY_USE_INTERNAL_FILES); do \
 			spatch $(_SPATCH_FLAGS) -D internal --very-quiet --local-includes --preprocess --sp-file $$cf $$f; \
 		done ; \
 		for f in $(OTHER_FILES); do \
 			spatch $(_SPATCH_FLAGS) --very-quiet --local-includes --preprocess --sp-file $$cf $$f; \
 		done ; \
 	done
 
 cocci-inplace:
 	$(MAKE) $(AM_MAKEFLAGS) _SPATCH_FLAGS=--in-place cocci
 
 cocci-test:
 	for f in coccinelle/test/*.c; do \
 		coccinelle/test/testrunner.sh $$f; \
 	done
diff --git a/devel/coccinelle/rename-fn.cocci b/devel/coccinelle/rename-fn.cocci
new file mode 100644
index 0000000000..5bce9b736c
--- /dev/null
+++ b/devel/coccinelle/rename-fn.cocci
@@ -0,0 +1,23 @@
+/*
+ * Copyright 2021 the Pacemaker project contributors
+ *
+ * The version control history for this file may have further details.
+ *
+ * This source code is licensed under the GNU General Public License version 2
+ * or later (GPLv2+) WITHOUT ANY WARRANTY.
+ */
+
+/*
+ * Rename a function or macro. This is here as a template; replace "old" and
+ * "new" below with the old and new names, run in the devel directory:
+ *
+ * make COCCI_FILES=coccinelle/rename-fn.cocci cocci-inplace
+ *
+ * then revert the file before committing.
+ */
+
+virtual internal
+
+@@ expression E; @@
+- old(E)
++ new(E)