CORRECTION:

I just realized that the patch I submitted yesterday with the original
bug report is missing a single question mark. While the patch, as sent,
does indeed fix the issue for systems affected by it, it actually
_causes_ the issue on systems that were working fine. Oops!

The corrected patched is attached.
diff --git a/debian/eudev.preinst b/debian/eudev.preinst
index 743c8267c..b9ebdb03c 100644
--- a/debian/eudev.preinst
+++ b/debian/eudev.preinst
@@ -18,7 +18,7 @@ check_kernel_features() {

       local needed_symbols='inotify_init signalfd accept4 open_by_handle_at timerfd_create epoll_create'
       for symbol in $needed_symbols; do
-      if ! egrep -q "^[a-fA-F0-9]+ T \.?sys_${symbol}$" /proc/kallsyms; then
+      if ! egrep -q "^[a-fA-F0-9]+ T (_+.*_)?sys_${symbol}$" /proc/kallsyms; then
       cat <<END
 Since release 198, udev requires support for the following features in
 the running kernel: