[Patch bpf-next] udp_bpf: remove some pointless comments

[Patch bpf-next] udp_bpf: remove some pointless comments

[Cong Wang]

From: Cong Wang <cong.wang@bytedance.com>

These comments in udp_bpf_update_proto() are copied from the
original TCP code and apparently do not apply to UDP. Just
remove them.

Reported-by: Jakub Sitnicki <jakub@cloudflare.com>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
---
 net/ipv4/udp_bpf.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/ipv4/udp_bpf.c b/net/ipv4/udp_bpf.c
index 7d5c4ebf42fe..4a7e38c5d842 100644
--- a/net/ipv4/udp_bpf.c
+++ b/net/ipv4/udp_bpf.c
@@ -110,7 +110,6 @@ int udp_bpf_update_proto(struct sock *sk, bool restore)
 
 	if (restore) {
 		sk->sk_write_space = psock->saved_write_space;
-		/* Pairs with lockless read in sk_clone_lock() */
 		WRITE_ONCE(sk->sk_prot, psock->sk_proto);
 		return 0;
 	}
@@ -118,7 +117,6 @@ int udp_bpf_update_proto(struct sock *sk, bool restore)
 	if (sk->sk_family == AF_INET6)
 		udp_bpf_check_v6_needs_rebuild(psock->sk_proto);
 
-	/* Pairs with lockless read in sk_clone_lock() */
 	WRITE_ONCE(sk->sk_prot, &udp_bpf_prots[family]);
 	return 0;
 }
-- 
2.25.1

RE: [Patch bpf-next] udp_bpf: remove some pointless comments

[John Fastabend]

Cong Wang wrote:
> From: Cong Wang <cong.wang@bytedance.com>
> 
> These comments in udp_bpf_update_proto() are copied from the
> original TCP code and apparently do not apply to UDP. Just
> remove them.
> 
> Reported-by: Jakub Sitnicki <jakub@cloudflare.com>
> Cc: John Fastabend <john.fastabend@gmail.com>
> Cc: Daniel Borkmann <daniel@iogearbox.net>
> Cc: Lorenz Bauer <lmb@cloudflare.com>
> Signed-off-by: Cong Wang <cong.wang@bytedance.com>
> ---

Acked-by: John Fastabend <john.fastabend@gmail.com>

Re: [Patch bpf-next] udp_bpf: remove some pointless comments

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to bpf/bpf-next.git (refs/heads/master):

On Fri,  2 Apr 2021 22:27:15 -0700 you wrote:
> From: Cong Wang <cong.wang@bytedance.com>
> 
> These comments in udp_bpf_update_proto() are copied from the
> original TCP code and apparently do not apply to UDP. Just
> remove them.
> 
> Reported-by: Jakub Sitnicki <jakub@cloudflare.com>
> Cc: John Fastabend <john.fastabend@gmail.com>
> Cc: Daniel Borkmann <daniel@iogearbox.net>
> Cc: Lorenz Bauer <lmb@cloudflare.com>
> Signed-off-by: Cong Wang <cong.wang@bytedance.com>
> 
> [...]

Here is the summary with links:
  - [bpf-next] udp_bpf: remove some pointless comments
    https://git.kernel.org/bpf/bpf-next/c/928dc406802d

You are awesome, thank you!
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