From 7fe70c06a182a140be9996b02256d907e114479a Mon Sep 17 00:00:00 2001
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Mon, 12 May 2025 11:27:31 +0200
Subject: net/sched: act_mirred: Move the recursion counter struct netdev_xmit

mirred_nest_level is a per-CPU variable and relies on disabled BH for its
locking. Without per-CPU locking in local_bh_disable() on PREEMPT_RT
this data structure requires explicit locking.

Move mirred_nest_level to struct netdev_xmit as u8, provide wrappers.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Cc: Cong Wang <xiyou.wangcong@gmail.com>
Cc: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Juri Lelli <juri.lelli@redhat.com>
Link: https://patch.msgid.link/20250512092736.229935-11-bigeasy@linutronix.de
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
 include/linux/netdevice_xmit.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'include')

diff --git a/include/linux/netdevice_xmit.h b/include/linux/netdevice_xmit.h
index 38325e070296..848735b3a7c0 100644
--- a/include/linux/netdevice_xmit.h
+++ b/include/linux/netdevice_xmit.h
@@ -8,6 +8,9 @@ struct netdev_xmit {
 #ifdef CONFIG_NET_EGRESS
 	u8  skip_txqueue;
 #endif
+#if IS_ENABLED(CONFIG_NET_ACT_MIRRED)
+	u8 sched_mirred_nest;
+#endif
 };
 
 #endif
-- 
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