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authorFabian Frederick <fabf@skynet.be>2014-06-03 21:55:15 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2014-06-10 10:48:28 +0200
commit92bdae5d9c95c9dece7886cbdf1f50548b44e60a (patch)
treedbd84088c6800a04b48df9ab00fd21175aa7b5da /drivers/s390
parentdbe33fc9ad0cd965afe71cd6fca9539afd704e38 (diff)
downloadlinux-92bdae5d9c95c9dece7886cbdf1f50548b44e60a.tar.bz2
s390/qdio: replace shift loop by ilog2
account_sbals is called by get_inbound_buffer_frontier and get_outbound_buffer_frontier with 'count' value > 0 so we can safely convert shift loop to ilog2. Cc: Joe Perches <joe@perches.com> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Fabian Frederick <fabf@skynet.be> Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/cio/qdio_main.c7
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c
index 77466c4faabb..f5f42c431409 100644
--- a/drivers/s390/cio/qdio_main.c
+++ b/drivers/s390/cio/qdio_main.c
@@ -409,17 +409,16 @@ static inline void qdio_stop_polling(struct qdio_q *q)
set_buf_state(q, q->u.in.ack_start, SLSB_P_INPUT_NOT_INIT);
}
-static inline void account_sbals(struct qdio_q *q, int count)
+static inline void account_sbals(struct qdio_q *q, unsigned 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]++;
}