Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Yang Xu <xuyang2018.jy@cn.fujitsu.com>
To:     <akpm@linux-foundation.org>, <gorcunov@gmail.com>
CC:     <linux-kernel@vger.kernel.org>,
        Yang Xu <xuyang2018.jy@cn.fujitsu.com>
Subject: [PATCH v2] sys_prctl(): remove unsigned comparision with less than zero
Date:   Wed, 24 Jul 2019 10:11:48 +0800
Message-ID: <1563934308-20833-1-git-send-email-xuyang2018.jy@cn.fujitsu.com>
In-Reply-To: <20190723094809.GE4832@uranus.lan>
References: <20190723094809.GE4832@uranus.lan>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Currently, when calling prctl(PR_SET_TIMERSLACK, arg2), arg2 is an
unsigned long value, arg2 will never < 0. Negative judgment is
meaningless, so remove it.

Fixes: 6976675d9404 ("hrtimer: create a "timer_slack" field in the task struct")
Signed-off-by: Yang Xu <xuyang2018.jy@cn.fujitsu.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
---
 kernel/sys.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sys.c b/kernel/sys.c
index 2969304c29fe..701b5f00651d 100644
--- a/kernel/sys.c
+++ b/kernel/sys.c
@@ -2372,7 +2372,7 @@ SYSCALL_DEFINE5(prctl, int, option, unsigned long, arg2, unsigned long, arg3,
 			error = current->timer_slack_ns;
 		break;
 	case PR_SET_TIMERSLACK:
-		if (arg2 <= 0)
+		if (arg2 == 0)
 			current->timer_slack_ns =
 					current->default_timer_slack_ns;
 		else
-- 
2.18.1