From: Fabian Frederick <fabf@skynet.be>
To: linux-kernel <linux-kernel@vger.kernel.org>
Cc: Sebastian Ott <sebott@linux.vnet.ibm.com>,
akpm <akpm@linux-foundation.org>
Subject: [PATCH 1/1] drivers/s390/cio/qdio_main.c: replace shift loop by ilog2
Date: Tue, 20 May 2014 18:37:28 +0200 [thread overview]
Message-ID: <20140520183728.c28374c3f1a655a2e33996a3@skynet.be> (raw)
This is untested.
Cc: Sebastian Ott <sebott@linux.vnet.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Fabian Frederick <fabf@skynet.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
next reply other threads:[~2014-05-20 16:37 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-20 16:37 Fabian Frederick [this message]
2014-05-20 16:45 ` Joe Perches
2014-05-21 12:32 ` Sebastian Ott
2014-06-02 14:41 ` Sebastian Ott
2014-06-02 18:17 ` Fabian Frederick
2014-06-03 7:41 ` Sebastian Ott
[not found] <OF57E68FFD.38663B1A-ONC1257CE0.00383C6B-C1257CE0.0038457A@de.ibm.com>
2014-05-22 10:22 ` Ursula Braun
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