From e3e12f52b214121840b44c91de5b3e5af5d3eb84 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 06 Nov 2023 03:04:41 +0000
Subject: [PATCH] rk3568 rt init
---
kernel/include/linux/netfilter/x_tables.h | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/kernel/include/linux/netfilter/x_tables.h b/kernel/include/linux/netfilter/x_tables.h
index 0ade4d1..3e21ce6 100644
--- a/kernel/include/linux/netfilter/x_tables.h
+++ b/kernel/include/linux/netfilter/x_tables.h
@@ -6,6 +6,7 @@
#include <linux/netdevice.h>
#include <linux/static_key.h>
#include <linux/netfilter.h>
+#include <linux/locallock.h>
#include <uapi/linux/netfilter/x_tables.h>
/* Test a struct->invflags and a boolean for inequality */
@@ -345,6 +346,8 @@
*/
DECLARE_PER_CPU(seqcount_t, xt_recseq);
+DECLARE_LOCAL_IRQ_LOCK(xt_write_lock);
+
/* xt_tee_enabled - true if x_tables needs to handle reentrancy
*
* Enabled if current ip(6)tables ruleset has at least one -j TEE rule.
@@ -364,6 +367,9 @@
static inline unsigned int xt_write_recseq_begin(void)
{
unsigned int addend;
+
+ /* RT protection */
+ local_lock(xt_write_lock);
/*
* Low order bit of sequence is set if we already
@@ -395,6 +401,7 @@
/* this is kind of a write_seqcount_end(), but addend is 0 or 1 */
smp_wmb();
__this_cpu_add(xt_recseq.sequence, addend);
+ local_unlock(xt_write_lock);
}
/*
--
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