return ret;
}
+static ssize_t queue_poll_show(struct request_queue *q, char *page)
+{
+ return queue_var_show(test_bit(QUEUE_FLAG_POLL, &q->queue_flags), page);
+}
+
+static ssize_t queue_poll_store(struct request_queue *q, const char *page,
+ size_t count)
+{
+ unsigned long poll_on;
+ ssize_t ret;
+
+ if (!q->mq_ops || !q->mq_ops->poll)
+ return -EINVAL;
+
+ ret = queue_var_store(&poll_on, page, count);
+ if (ret < 0)
+ return ret;
+
+ spin_lock_irq(q->queue_lock);
+ if (poll_on)
+ queue_flag_set(QUEUE_FLAG_POLL, q);
+ else
+ queue_flag_clear(QUEUE_FLAG_POLL, q);
+ spin_unlock_irq(q->queue_lock);
+
+ return ret;
+}
+
static struct queue_sysfs_entry queue_requests_entry = {
.attr = {.name = "nr_requests", .mode = S_IRUGO | S_IWUSR },
.show = queue_requests_show,
.store = queue_store_random,
};
+static struct queue_sysfs_entry queue_poll_entry = {
+ .attr = {.name = "io_poll", .mode = S_IRUGO | S_IWUSR },
+ .show = queue_poll_show,
+ .store = queue_poll_store,
+};
+
static struct attribute *default_attrs[] = {
&queue_requests_entry.attr,
&queue_ra_entry.attr,
&queue_rq_affinity_entry.attr,
&queue_iostats_entry.attr,
&queue_random_entry.attr,
+ &queue_poll_entry.attr,
NULL,
};