From: Tobias Geerinckx-Rice <me@tobias.gr>
Date: Sun Sep 24 02:00:00 2023 +0200
Subject: xen: docs: Use predictable ordering.

What follows was taken verbatim from Debian.  See:
https://sources.debian.org/patches/xen/4.14.5%2B94-ge49571868d-1/

From: Maximilian Engelhardt <maxi@daemonizer.de>
Date: Fri, 18 Dec 2020 21:42:34 +0100
Subject: docs: use predictable ordering in generated documentation

When the seq number is equal, sort by the title to get predictable
output ordering. This is useful for reproducible builds.

Signed-off-by: Maximilian Engelhardt <maxi@daemonizer.de>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
(cherry picked from commit e18dadc5b709290b8038a1cacb52bc3b3b69cf21)
---
 docs/xen-headers | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/xen-headers b/docs/xen-headers
index 5415563..8c434d7 100755
--- a/docs/xen-headers
+++ b/docs/xen-headers
@@ -331,7 +331,7 @@ sub output_index () {
 <h2>Starting points</h2>
 <ul>
 END
-    foreach my $ic (sort { $a->{Seq} <=> $b->{Seq} } @incontents) {
+    foreach my $ic (sort { $a->{Seq} <=> $b->{Seq} or $a->{Title} cmp $b->{Title} } @incontents) {
         $o .= "<li><a href=\"$ic->{Href}\">$ic->{Title}</a></li>\n";
     }
     $o .= "</ul>\n";
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