add at24 driver

hc

2023-11-06 15ade055295d13f95d49e3d99b09f3bbfb4a43e7

 kernel/net/ipv4/tcp_ipv4.c
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@@ -62,6 +62,7 @@
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 #include <linux/init.h>
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 #include <linux/times.h>
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 #include <linux/slab.h>
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+#include <linux/locallock.h>
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 #include <net/net_namespace.h>
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 #include <net/icmp.h>
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@@ -637,6 +638,7 @@
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 }
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 EXPORT_SYMBOL(tcp_v4_send_check);
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+static DEFINE_LOCAL_IRQ_LOCK(tcp_sk_lock);
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 /*
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  *	This routine will send an RST to the other tcp.
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  *
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@@ -771,6 +773,7 @@
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 	arg.tos = ip_hdr(skb)->tos;
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 	arg.uid = sock_net_uid(net, sk && sk_fullsock(sk) ? sk : NULL);
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 	local_bh_disable();
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+	local_lock(tcp_sk_lock);
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 	ctl_sk = *this_cpu_ptr(net->ipv4.tcp_sk);
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 	if (sk)
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 		ctl_sk->sk_mark = (sk->sk_state == TCP_TIME_WAIT) ?
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@@ -783,6 +786,7 @@
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 	ctl_sk->sk_mark = 0;
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 	__TCP_INC_STATS(net, TCP_MIB_OUTSEGS);
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 	__TCP_INC_STATS(net, TCP_MIB_OUTRSTS);
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+	local_unlock(tcp_sk_lock);
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 	local_bh_enable();
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 #ifdef CONFIG_TCP_MD5SIG
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@@ -863,6 +867,7 @@
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 	arg.tos = tos;
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 	arg.uid = sock_net_uid(net, sk_fullsock(sk) ? sk : NULL);
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 	local_bh_disable();
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+	local_lock(tcp_sk_lock);
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 	ctl_sk = *this_cpu_ptr(net->ipv4.tcp_sk);
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 	if (sk)
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 		ctl_sk->sk_mark = (sk->sk_state == TCP_TIME_WAIT) ?
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@@ -874,6 +879,7 @@
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 	ctl_sk->sk_mark = 0;
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 	__TCP_INC_STATS(net, TCP_MIB_OUTSEGS);
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+	local_unlock(tcp_sk_lock);
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 	local_bh_enable();
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 }
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