linux-kernel - Re: [PATCH] net: Avoid strcmp current->comm with warncomm when warned >= 5

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Message-Id: <20200818.124517.1912943894802724387.davem@davemloft.net>
Date:   Tue, 18 Aug 2020 12:45:17 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     linmiaohe@...wei.com
Cc:     kuba@...nel.org, edumazet@...gle.com, kafai@...com, ast@...nel.org,
        jakub@...udflare.com, zhang.lin16@....com.cn,
        keescook@...omium.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] net: Avoid strcmp current->comm with warncomm when
 warned >= 5

From: Miaohe Lin <linmiaohe@...wei.com>
Date: Tue, 18 Aug 2020 07:41:32 -0400

> @@ -417,7 +417,7 @@ 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) {
> +	if (warned < 5 && strcmp(warncomm, current->comm)) {
>  		strcpy(warncomm,  current->comm);
>  		pr_warn("process `%s' is using obsolete %s SO_BSDCOMPAT\n",
>  			warncomm, name);

We've been warning about SO_BSDCOMPAT usage for almost 20 years, I think
we can remove this code completely now.