netdev - [PATCH net-next 1/3] net: Remove task_struct::bpf_net

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Message-ID: <20240628103020.1766241-2-bigeasy@linutronix.de>
Date: Fri, 28 Jun 2024 12:18:54 +0200
From: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To: netdev@...r.kernel.org,
	bpf@...r.kernel.org
Cc: Björn Töpel <bjorn@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Alexei Starovoitov <ast@...nel.org>,
	Andrii Nakryiko <andrii@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Eduard Zingerman <eddyz87@...il.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Hao Luo <haoluo@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	Jiri Olsa <jolsa@...nel.org>,
	John Fastabend <john.fastabend@...il.com>,
	Jonathan Lemon <jonathan.lemon@...il.com>,
	KP Singh <kpsingh@...nel.org>,
	Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
	Magnus Karlsson <magnus.karlsson@...el.com>,
	Martin KaFai Lau <martin.lau@...ux.dev>,
	Paolo Abeni <pabeni@...hat.com>,
	Song Liu <song@...nel.org>,
	Stanislav Fomichev <sdf@...ichev.me>,
	Thomas Gleixner <tglx@...utronix.de>,
	Yonghong Song <yonghong.song@...ux.dev>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: [PATCH net-next 1/3] net: Remove task_struct::bpf_net_context init on fork.

There is no clone() invocation within a bpf_net_ctx_…() block. Therefore
the task_struct::bpf_net_context has always to be NULL and an explicit
initialisation is not required.

Remove the NULL assignment in the clone() path.

Suggested-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
---
 kernel/fork.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/fork.c b/kernel/fork.c
index f314bdd7e6108..99076dbe27d83 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -2355,7 +2355,6 @@ __latent_entropy struct task_struct *copy_process(
 	RCU_INIT_POINTER(p->bpf_storage, NULL);
 	p->bpf_ctx = NULL;
 #endif
-	p->bpf_net_context =  NULL;
 
 	/* Perform scheduler related setup. Assign this task to a CPU. */
 	retval = sched_fork(clone_flags, p);
-- 
2.45.2