linux-kernel - [PATCH] time: fix a assignment error in ntp module

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Message-Id: <20190422093421.47896-1-swkhack@gmail.com>
Date:   Mon, 22 Apr 2019 17:34:21 +0800
From:   Weikang shi <swkhack@...il.com>
To:     john.stultz@...aro.org
Cc:     tglx@...utronix.de, sboyd@...nel.org, linux-kernel@...r.kernel.org,
        swkhack@...com, swkhack <swkhack@...il.com>
Subject: [PATCH] time: fix a assignment error in ntp module

From: swkhack <swkhack@...il.com>

It is meanless to check a 64bit(txc->constant) value is postive 
when the value has to be assigned to a 32 bit variable(*time_tai).
So I make a temp type conversion before the compare.

Signed-off-by: swkhack <swkhack@...il.com>
---
 kernel/time/ntp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/time/ntp.c b/kernel/time/ntp.c
index 92a90014a..6b454eafc 100644
--- a/kernel/time/ntp.c
+++ b/kernel/time/ntp.c
@@ -690,7 +690,7 @@ static inline void process_adjtimex_modes(const struct __kernel_timex *txc,
 		time_constant = max(time_constant, 0l);
 	}
 
-	if (txc->modes & ADJ_TAI && txc->constant > 0)
+	if (txc->modes & ADJ_TAI && (int)txc->constant > 0)
 		*time_tai = txc->constant;
 
 	if (txc->modes & ADJ_OFFSET)
-- 
2.17.1