Hi, At debian/patches/bugfix/all/tools-perf-man-date.patch is a patch to "allow man pages to be built reproducibly"
I just stumbled upon a commit with title "perf doc: Set man page date to last git commit" (from 2020-03-10) https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/tools/perf/Documentation/Makefile?id=0c2d041232411c8124136c9497c0e352dcf18baa The former patch sets 'revdate' while the latter uses 'perf_date', so maybe they're both still needed, but wanted to point it out none-the-less. Cheers, Diederik
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