linux-kernel - [PATCH 1/1] drivers/s390/cio/qdio_main.c: replace shift loop by ilog2

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <20140520183728.c28374c3f1a655a2e33996a3@skynet.be>
Date:	Tue, 20 May 2014 18:37:28 +0200
From:	Fabian Frederick <fabf@...net.be>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Cc:	Sebastian Ott <sebott@...ux.vnet.ibm.com>,
	akpm <akpm@...ux-foundation.org>
Subject: [PATCH 1/1] drivers/s390/cio/qdio_main.c: replace shift loop by
 ilog2


This is untested.

Cc: Sebastian Ott <sebott@...ux.vnet.ibm.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>
Signed-off-by: Fabian Frederick <fabf@...net.be>
---
 drivers/s390/cio/qdio_main.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 77466c4..8bf9ec1 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -411,15 +411,14 @@ static inline void qdio_stop_polling(struct qdio_q *q)
 
 static inline void account_sbals(struct qdio_q *q, int count)
 {
-	int pos = 0;
+	int pos;
 
 	q->q_stats.nr_sbal_total += count;
 	if (count == QDIO_MAX_BUFFERS_MASK) {
 		q->q_stats.nr_sbals[7]++;
 		return;
 	}
-	while (count >>= 1)
-		pos++;
+	pos = ilog2(count);
 	q->q_stats.nr_sbals[pos]++;
 }
 
-- 
1.8.4.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/