[PATCH] perf tools: Use $KBUILD_BUILD_TIMESTAMP as man page date

[Ben Hutchings]

This allows man pages to be built reproducibly.

Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
---
--- a/tools/perf/Documentation/Makefile
+++ b/tools/perf/Documentation/Makefile
@@ -120,6 +120,9 @@ endif
 ifdef DOCBOOK_SUPPRESS_SP
 XMLTO_EXTRA += -m manpage-suppress-sp.xsl
 endif
+ifdef KBUILD_BUILD_TIMESTAMP
+ASCIIDOC_EXTRA += -a revdate=$(shell date -u -d '$(KBUILD_BUILD_TIMESTAMP)' +%Y-%m-%d)
+endif
 
 SHELL_PATH ?= $(SHELL)
 # Shell quote;
--- a/tools/perf/Documentation/asciidoc.conf
+++ b/tools/perf/Documentation/asciidoc.conf
@@ -71,6 +71,9 @@ ifdef::backend-docbook[]
 [header]
 template::[header-declarations]
 <refentry>
+<refentryinfo>
+template::[docinfo]
+</refentryinfo>
 <refmeta>
 <refentrytitle>{mantitle}</refentrytitle>
 <manvolnum>{manvolnum}</manvolnum>

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