From 33f388112b552e536c2d1cb75541f5b14448f05a Mon Sep 17 00:00:00 2001
From: Jozsef Kadlecsik <kadlec@netfilter.org>
Date: Sat, 22 Feb 2020 12:51:24 +0100
Subject: Add checking system_power_efficient_wq in the kernel source tree

---
 configure.ac | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 69a97a9..2b80248 100644
--- a/configure.ac
+++ b/configure.ac
@@ -206,6 +206,16 @@ AC_CHECK_FUNCS(gethostbyname2)
 if test "$BUILDKMOD" == "yes"
 then
 dnl Check kernel incompatibilities... Ugly like hell
+
+AC_MSG_CHECKING([kernel source for system_power_efficient_wq])
+if test -f $ksourcedir/include/linux/workqueue.h && \
+   $GREP -q 'system_power_efficient_wq' $ksourcedir/include/linux/workqueue.h; then
+	AC_MSG_RESULT(yes)
+else
+	AC_MSG_RESULT(no)
+	AC_MSG_ERROR([Kernel source tree is too old, at least v3.11 is required])
+fi
+
 AC_MSG_CHECKING([kernel source for struct xt_action_param])
 if test -f $ksourcedir/include/linux/netfilter/x_tables.h && \
    $GREP -q 'struct xt_action_param' $ksourcedir/include/linux/netfilter/x_tables.h; then
-- 
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