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Commit 92bdae5d authored by Fabian Frederick's avatar Fabian Frederick Committed by Martin Schwidefsky
Browse files

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: default avatarFabian Frederick <fabf@skynet.be>
Signed-off-by: default avatarSebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent dbe33fc9

drivers/s390/cio/qdio_main.c

+3 −4
Original line number Original line Diff line number Diff line
@@ -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);

		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;

	q->q_stats.nr_sbal_total += count;

	if (count == QDIO_MAX_BUFFERS_MASK) {

	if (count == QDIO_MAX_BUFFERS_MASK) {

		q->q_stats.nr_sbals[7]++;

		q->q_stats.nr_sbals[7]++;

		return;

		return;

	}

	}

	while (count >>= 1)

	pos = ilog2(count);

		pos++;

	q->q_stats.nr_sbals[pos]++;

	q->q_stats.nr_sbals[pos]++;

}

}