From bf8533f529b8d78c54816d83391be833e1db824b Mon Sep 17 00:00:00 2001
From: Jozsef Kadlecsik <kadlec@netfilter.org>
Date: Mon, 9 Mar 2020 11:54:08 +0100
Subject: ipset: Support kernels with at least system_wq support

---
 configure.ac | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index b7b69d1..a03401b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -212,9 +212,12 @@ if test -f $ksourcedir/include/linux/workqueue.h && \
    $GREP -q 'system_power_efficient_wq' $ksourcedir/include/linux/workqueue.h; then
 	AC_MSG_RESULT(yes)
 	AC_SUBST(HAVE_SYSTEM_POWER_EFFICIENT_WQ, define)
-else
+elif test -f $ksourcedir/include/linux/workqueue.h && \
+   $GREP -q 'system_wq' $ksourcedir/include/linux/workqueue.h; then
 	AC_MSG_RESULT(no)
 	AC_SUBST(HAVE_SYSTEM_POWER_EFFICIENT_WQ, undef)
+else
+	AC_MSG_ERROR([Kernel source tree is too old, at least v2.36 is required])
 fi
 
 AC_MSG_CHECKING([kernel source for struct xt_action_param])
-- 
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