diff --git a/patches/net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch b/patches/net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch
deleted file mode 100644
index 7587708..0000000
--- a/patches/net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch
+++ /dev/null
@@ -1,37 +0,0 @@
-From 6e3be85b547b6f2b5e1740acf874b95b6721d873 Mon Sep 17 00:00:00 2001
-From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
-Date: Wed, 30 Mar 2016 13:36:29 +0200
-Subject: [PATCH] net: dev: always take qdisc's busylock in __dev_xmit_skb()
-
-The root-lock is dropped before dev_hard_start_xmit() is invoked and after
-setting the __QDISC___STATE_RUNNING bit. If this task is now pushed away
-by a task with a higher priority then the task with the higher priority
-won't be able to submit packets to the NIC directly instead they will be
-enqueued into the Qdisc. The NIC will remain idle until the task(s) with
-higher priority leave the CPU and the task with lower priority gets back
-and finishes the job.
-
-If we take always the busylock we ensure that the RT task can boost the
-low-prio task and submit the packet.
-
-Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
-
-diff --git a/net/core/dev.c b/net/core/dev.c
-index b1e7a30b0cdf..aff6965fe941 100644
---- a/net/core/dev.c
-+++ b/net/core/dev.c
-@@ -3084,7 +3084,11 @@ static inline int __dev_xmit_skb(struct sk_buff *skb, struct Qdisc *q,
- 	 * This permits qdisc->running owner to get the lock more
- 	 * often and dequeue packets faster.
- 	 */
-+#ifdef CONFIG_PREEMPT_RT_FULL
-+	contended = true;
-+#else
- 	contended = qdisc_is_running(q);
-+#endif
- 	if (unlikely(contended))
- 		spin_lock(&q->busylock);
- 
--- 
-2.5.0
-
diff --git a/patches/series b/patches/series
index 7e04717..285bb41 100644
--- a/patches/series
+++ b/patches/series
@@ -430,7 +430,8 @@
 net-core-cpuhotplug-drain-input_pkt_queue-lockless.patch
 net-move-xmit_recursion-to-per-task-variable-on-RT.patch
 net-provide-a-way-to-delegate-processing-a-softirq-t.patch
-net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch
+# not valid after mainline commit f9eb8aea2a1e seqcount addition
+# net-dev-always-take-qdisc-s-busylock-in-__dev_xmit_s.patch
 net-add-back-the-missing-serialization-in-ip_send_un.patch
 net-add-a-lock-around-icmp_sk.patch