diff options
| author |   Julian Wiedmann <jwi@linux.ibm.com> | 2019-03-28 10:45:11 +0100 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-04-10 17:47:26 +0200 |
| commit | dccbbaff174df174bb30c21e05d7b732d013ea1a (patch) | |
| tree | 92c7e24a229126621297891496de1101be1b5edd /drivers/s390 | |
| parent | s390/qdio: simplify SBAL range calculation (diff) | |
| download | linux-dev-dccbbaff174df174bb30c21e05d7b732d013ea1a.tar.xz linux-dev-dccbbaff174df174bb30c21e05d7b732d013ea1a.zip | |
s390/qdio: eliminate queue's last_move cursor
This cursor is used for debugging only. But since
commit "s390/qdio: pass up count of ready-to-process SBALs" it effectively
duplicates the first_to_check cursor, diverging for just a short moment
when get_*_buffer_frontier() updates q->first_to_check.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390')
| -rw-r--r-- | drivers/s390/cio/qdio.h | 3 | ||||
| -rw-r--r-- | drivers/s390/cio/qdio_debug.c | 5 | ||||
| -rw-r--r-- | drivers/s390/cio/qdio_main.c | 11 |
3 files changed, 5 insertions, 14 deletions
diff --git a/drivers/s390/cio/qdio.h b/drivers/s390/cio/qdio.h index 2c29141005ca..a06944399865 100644 --- a/drivers/s390/cio/qdio.h +++ b/drivers/s390/cio/qdio.h @@ -228,9 +228,6 @@ struct qdio_q { */ int first_to_check; - /* first_to_check of the last time */ - int last_move; - /* beginning position for calling the program */ int first_to_kick; diff --git a/drivers/s390/cio/qdio_debug.c b/drivers/s390/cio/qdio_debug.c index 4d77d87538c9..35410e6eda2e 100644 --- a/drivers/s390/cio/qdio_debug.c +++ b/drivers/s390/cio/qdio_debug.c @@ -121,9 +121,8 @@ static int qstat_show(struct seq_file *m, void *v) seq_printf(m, "Timestamp: %Lx Last AI: %Lx\n", q->timestamp, last_ai_time); - seq_printf(m, "nr_used: %d ftc: %d last_move: %d\n", - atomic_read(&q->nr_buf_used), - q->first_to_check, q->last_move); + seq_printf(m, "nr_used: %d ftc: %d\n", + atomic_read(&q->nr_buf_used), q->first_to_check); if (q->is_input_q) { seq_printf(m, "polling: %d ack start: %d ack count: %d\n", q->u.in.polling, q->u.in.ack_start, diff --git a/drivers/s390/cio/qdio_main.c b/drivers/s390/cio/qdio_main.c index b6bc02efa0d0..0ccd3b30af78 100644 --- a/drivers/s390/cio/qdio_main.c +++ b/drivers/s390/cio/qdio_main.c @@ -551,11 +551,8 @@ static int qdio_inbound_q_moved(struct qdio_q *q) count = get_inbound_buffer_frontier(q); - if (count) { - q->last_move = q->first_to_check; - if (!is_thinint_irq(q->irq_ptr) && MACHINE_IS_LPAR) - q->u.in.timestamp = get_tod_clock(); - } + if (count && !is_thinint_irq(q->irq_ptr) && MACHINE_IS_LPAR) + q->u.in.timestamp = get_tod_clock(); return count; } @@ -780,10 +777,8 @@ static inline int qdio_outbound_q_moved(struct qdio_q *q) count = get_outbound_buffer_frontier(q); - if (count) { - q->last_move = q->first_to_check; + if (count) DBF_DEV_EVENT(DBF_INFO, q->irq_ptr, "out moved:%1d", q->nr); - } return count; } |