[PATCH perfbook] bib: make ref to git archive explicit

From: 周洲仪 <[email protected]>

According to our Chinese version editor Yunjing Li's advice,
 make reference to perfbook's git archive explicit.
 
Signed-off-by: Zhouyi Zhou<[email protected]>
---
 bib/syncrefs.bib | 8 ++++++++
 howto/howto.tex  | 2 +-
 legal.tex        | 5 ++---
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/bib/syncrefs.bib b/bib/syncrefs.bib
index 6ee50e3b..4f347488 100644
--- a/bib/syncrefs.bib
+++ b/bib/syncrefs.bib
@@ -2025,3 +2025,11 @@ Parallel Server on UNIX",
  Month="September",
  Note="Linux Plumbers Conference \url{https://lpc.events/event/16/contributions/1226/}",
 }
+
+@unpublished{PaulmckPerfbookGit,
+ author="Paul E. McKenney",
+ title="Is Parallel Programming Hard, And, If So, What Can You Do About It? Git Archive",
+ year="2023",
+ note={\url{git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/perfbook.git}},
+ lastchecked="December 27, 2023",
+}
\ No newline at end of file
diff --git a/howto/howto.tex b/howto/howto.tex
index 55270cba..e7cd5f3c 100644
--- a/howto/howto.tex
+++ b/howto/howto.tex
@@ -226,7 +226,7 @@ Here are a few possible strategies:
 	only a blank sheet of paper.
 \item	If you find the Quick Quizzes distracting but impossible
 	to ignore, you can always clone the \LaTeX{} source for
-	this book from the git archive.
+	this book from the git archive~\cite{PaulmckPerfbookGit}.
 	You can then run the command \co{make nq}, which will
 	produce a \co{perfbook-nq.pdf}.
 	This PDF contains unobtrusive boxed tags where the Quick Quizzes
diff --git a/legal.tex b/legal.tex
index f443df37..ca21ecaf 100644
--- a/legal.tex
+++ b/legal.tex
@@ -42,12 +42,11 @@ Source code is covered by various versions of the GPL\@.\footnote{
 Some of this code is GPLv2-only, as it derives from the Linux kernel,
 while other code is GPLv2-or-later.
 See the comment headers of the individual source files within the
-CodeSamples directory in the git archive\footnote{
-	\url{git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/perfbook.git}}
+CodeSamples directory in the git archive~\cite{PaulmckPerfbookGit}
 for the exact licenses.
 If you are unsure of the license for a given code fragment,
 you should assume GPLv2-only.
 
 Combined work {\textcopyright}~2005--\commityear\ by Paul E. McKenney.
 Each individual contribution is copyright by its contributor at the time
-of contribution, as recorded in the git archive.
+of contribution, as recorded in the git archive~\cite{PaulmckPerfbookGit}.
-- 
2.34.1