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SubjectRe: [PATCH 1/1] drivers/s390/cio/qdio_main.c: replace shift loop by ilog2
Hello Fabian,

On Tue, 20 May 2014, Fabian Frederick wrote:
>
> 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
>
>

Could you please resend the patch with a better description plus
the change Joe suggested.

Thanks,
Sebastian



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