diff options
| author | Fabian Frederick <fabf@skynet.be> | 2014-06-03 21:55:15 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-06-10 10:48:28 +0200 |
| commit | 92bdae5d9c95c9dece7886cbdf1f50548b44e60a (patch) | |
| tree | dbd84088c6800a04b48df9ab00fd21175aa7b5da /drivers/s390/cio | |
| parent | s390/cio: silence lockdep warning (diff) | |
| download | linux-92bdae5d9c95c9dece7886cbdf1f50548b44e60a.tar.xz linux-92bdae5d9c95c9dece7886cbdf1f50548b44e60a.zip | |
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/cio')
| -rw-r--r-- | drivers/s390/cio/qdio_main.c | 7 |
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]++; } |