linux-kernel - [PATCH] clockevents: remove unnecessary unlikely()

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Date:   Sat,  3 Nov 2018 22:31:04 -0400
From:   Yangtao Li <tiny.windzz@...il.com>
To:     tglx@...utronix.de
Cc:     linux-kernel@...r.kernel.org, Yangtao Li <tiny.windzz@...il.com>
Subject: [PATCH] clockevents: remove unnecessary unlikely()

WARN_ON() and WARN_ON_ONCE() already contains an unlikely(), so it's not
necessary to use unlikely.

Signed-off-by: Yangtao Li <tiny.windzz@...il.com>
---
 kernel/time/clockevents.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)

diff --git a/kernel/time/clockevents.c b/kernel/time/clockevents.c
index 8c0e4092f661..af58898d9ebf 100644
--- a/kernel/time/clockevents.c
+++ b/kernel/time/clockevents.c
@@ -39,10 +39,8 @@ static u64 cev_delta2ns(unsigned long latch, struct clock_event_device *evt,
 	u64 clc = (u64) latch << evt->shift;
 	u64 rnd;
 
-	if (unlikely(!evt->mult)) {
+	if (WARN_ON(!evt->mult))
 		evt->mult = 1;
-		WARN_ON(1);
-	}
 	rnd = (u64) evt->mult - 1;
 
 	/*
@@ -164,10 +162,8 @@ void clockevents_switch_state(struct clock_event_device *dev,
 		 * on it, so fix it up and emit a warning:
 		 */
 		if (clockevent_state_oneshot(dev)) {
-			if (unlikely(!dev->mult)) {
+			if (WARN_ON(!dev->mult))
 				dev->mult = 1;
-				WARN_ON(1);
-			}
 		}
 	}
 }
@@ -315,10 +311,8 @@ int clockevents_program_event(struct clock_event_device *dev, ktime_t expires,
 	int64_t delta;
 	int rc;
 
-	if (unlikely(expires < 0)) {
-		WARN_ON_ONCE(1);
+	if (WARN_ON_ONCE(expires < 0))
 		return -ETIME;
-	}
 
 	dev->next_event = expires;
 
-- 
2.17.0