linux-kernel - [PATCH 1/5] random: remove unnecessary unlikely()

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Message-Id: <20190607182517.28266-1-tiny.windzz@gmail.com>
Date:   Fri,  7 Jun 2019 14:25:13 -0400
From:   Yangtao Li <tiny.windzz@...il.com>
To:     tytso@....edu, arnd@...db.de, gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, Yangtao Li <tiny.windzz@...il.com>
Subject: [PATCH 1/5] random: remove unnecessary unlikely()

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

Signed-off-by: Yangtao Li <tiny.windzz@...il.com>
---
 drivers/char/random.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/char/random.c b/drivers/char/random.c
index 5d5ea4ce1442..bebf622c61c4 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -759,10 +759,9 @@ static void credit_entropy_bits(struct entropy_store *r, int nbits)
 		} while (unlikely(entropy_count < pool_size-2 && pnfrac));
 	}
 
-	if (unlikely(entropy_count < 0)) {
+	if (WARN_ON(entropy_count < 0)) {
 		pr_warn("random: negative entropy/overflow: pool %s count %d\n",
 			r->name, entropy_count);
-		WARN_ON(1);
 		entropy_count = 0;
 	} else if (entropy_count > pool_size)
 		entropy_count = pool_size;
@@ -1465,10 +1464,9 @@ static size_t account(struct entropy_store *r, size_t nbytes, int min,
 	if (ibytes < min)
 		ibytes = 0;
 
-	if (unlikely(entropy_count < 0)) {
+	if (WARN_ON(entropy_count < 0)) {
 		pr_warn("random: negative entropy count: pool %s count %d\n",
 			r->name, entropy_count);
-		WARN_ON(1);
 		entropy_count = 0;
 	}
 	nfrac = ibytes << (ENTROPY_SHIFT + 3);
-- 
2.17.0