netdev - [PATCH v2] net: Stop warning about SO

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Date:   Wed, 19 Aug 2020 04:32:08 -0400
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>, <edumazet@...gle.com>,
        <kafai@...com>, <daniel@...earbox.net>, <jakub@...udflare.com>,
        <keescook@...omium.org>, <zhang.lin16@....com.cn>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH v2] net: Stop warning about SO_BSDCOMPAT usage

We've been warning about SO_BSDCOMPAT usage for many years. We may remove
this code completely now.

Suggested-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 net/core/sock.c | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/net/core/sock.c b/net/core/sock.c
index e4f40b175acb..64d2aec5ed45 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -413,18 +413,6 @@ static int sock_set_timeout(long *timeo_p, sockptr_t optval, int optlen,
 	return 0;
 }
 
-static void sock_warn_obsolete_bsdism(const char *name)
-{
-	static int warned;
-	static char warncomm[TASK_COMM_LEN];
-	if (strcmp(warncomm, current->comm) && warned < 5) {
-		strcpy(warncomm,  current->comm);
-		pr_warn("process `%s' is using obsolete %s SO_BSDCOMPAT\n",
-			warncomm, name);
-		warned++;
-	}
-}
-
 static bool sock_needs_netstamp(const struct sock *sk)
 {
 	switch (sk->sk_family) {
@@ -984,7 +972,6 @@ int sock_setsockopt(struct socket *sock, int level, int optname,
 		break;
 
 	case SO_BSDCOMPAT:
-		sock_warn_obsolete_bsdism("setsockopt");
 		break;
 
 	case SO_PASSCRED:
@@ -1387,7 +1374,6 @@ int sock_getsockopt(struct socket *sock, int level, int optname,
 		break;
 
 	case SO_BSDCOMPAT:
-		sock_warn_obsolete_bsdism("getsockopt");
 		break;
 
 	case SO_TIMESTAMP_OLD:
-- 
2.19.1