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

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Message-ID: <20200818114132.17510-1-linmiaohe@huawei.com>
Date:   Tue, 18 Aug 2020 07:41:32 -0400
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <davem@...emloft.net>, <kuba@...nel.org>, <edumazet@...gle.com>,
        <kafai@...com>, <ast@...nel.org>, <jakub@...udflare.com>,
        <zhang.lin16@....com.cn>, <keescook@...omium.org>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH] net: Avoid strcmp current->comm with warncomm when warned >= 5

We can possibly avoid strcmp warncomm with current->comm by check warned
first.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 net/core/sock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/sock.c b/net/core/sock.c
index e4f40b175acb..51e13bc42791 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -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);
-- 
2.19.1