diff options
| -rw-r--r-- | block/cfq-iosched.c | 17 | ||||
| -rw-r--r-- | block/deadline-iosched.c | 16 | ||||
| -rw-r--r-- | block/elevator.c | 25 | ||||
| -rw-r--r-- | block/noop-iosched.c | 17 | ||||
| -rw-r--r-- | include/linux/elevator.h | 6 |
5 files changed, 51 insertions, 30 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index d5cd3131c57..d5bbdcfd0da 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -4347,18 +4347,28 @@ static void cfq_exit_queue(struct elevator_queue *e) kfree(cfqd); } -static int cfq_init_queue(struct request_queue *q) +static int cfq_init_queue(struct request_queue *q, struct elevator_type *e) { struct cfq_data *cfqd; struct blkcg_gq *blkg __maybe_unused; int i, ret; + struct elevator_queue *eq; + + eq = elevator_alloc(q, e); + if (!eq) + return -ENOMEM; cfqd = kmalloc_node(sizeof(*cfqd), GFP_KERNEL | __GFP_ZERO, q->node); - if (!cfqd) + if (!cfqd) { + kobject_put(&eq->kobj); return -ENOMEM; + } + eq->elevator_data = cfqd; cfqd->queue = q; - q->elevator->elevator_data = cfqd; + spin_lock_irq(q->queue_lock); + q->elevator = eq; + spin_unlock_irq(q->queue_lock); /* Init root service tree */ cfqd->grp_service_tree = CFQ_RB_ROOT; @@ -4433,6 +4443,7 @@ static int cfq_init_queue(struct request_queue *q) out_free: kfree(cfqd); + kobject_put(&eq->kobj); return ret; } diff --git a/block/deadline-iosched.c b/block/deadline-iosched.c index ba19a3afab7..20614a33236 100644 --- a/block/deadline-iosched.c +++ b/block/deadline-iosched.c @@ -337,13 +337,21 @@ static void deadline_exit_queue(struct elevator_queue *e) /* * initialize elevator private data (deadline_data). */ -static int deadline_init_queue(struct request_queue *q) +static int deadline_init_queue(struct request_queue *q, struct elevator_type *e) { struct deadline_data *dd; + struct elevator_queue *eq; + + eq = elevator_alloc(q, e); + if (!eq) + return -ENOMEM; dd = kmalloc_node(sizeof(*dd), GFP_KERNEL | __GFP_ZERO, q->node); - if (!dd) + if (!dd) { + kobject_put(&eq->kobj); return -ENOMEM; + } + eq->elevator_data = dd; INIT_LIST_HEAD(&dd->fifo_list[READ]); INIT_LIST_HEAD(&dd->fifo_list[WRITE]); @@ -355,7 +363,9 @@ static int deadline_init_queue(struct request_queue *q) dd->front_merges = 1; dd->fifo_batch = fifo_batch; - q->elevator->elevator_data = dd; + spin_lock_irq(q->queue_lock); + q->elevator = eq; + spin_unlock_irq(q->queue_lock); return 0; } diff --git a/block/elevator.c b/block/elevator.c index eba5b04c29b..668394d1858 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -150,7 +150,7 @@ void __init load_default_elevator_module(void) static struct kobj_type elv_ktype; -static struct elevator_queue *elevator_alloc(struct request_queue *q, +struct elevator_queue *elevator_alloc(struct request_queue *q, struct elevator_type *e) { struct elevator_queue *eq; @@ -170,6 +170,7 @@ err: elevator_put(e); return NULL; } +EXPORT_SYMBOL(elevator_alloc); static void elevator_release(struct kobject *kobj) { @@ -221,16 +222,7 @@ int elevator_init(struct request_queue *q, char *name) } } - q->elevator = elevator_alloc(q, e); - if (!q->elevator) - return -ENOMEM; - - err = e->ops.elevator_init_fn(q); - if (err) { - kobject_put(&q->elevator->kobj); - return err; - } - + err = e->ops.elevator_init_fn(q, e); return 0; } EXPORT_SYMBOL(elevator_init); @@ -935,16 +927,9 @@ static int elevator_switch(struct request_queue *q, struct elevator_type *new_e) spin_unlock_irq(q->queue_lock); /* allocate, init and register new elevator */ - err = -ENOMEM; - q->elevator = elevator_alloc(q, new_e); - if (!q->elevator) - goto fail_init; - - err = new_e->ops.elevator_init_fn(q); - if (err) { - kobject_put(&q->elevator->kobj); + err = new_e->ops.elevator_init_fn(q, new_e); + if (err) goto fail_init; - } if (registered) { err = elv_register_queue(q); diff --git a/block/noop-iosched.c b/block/noop-iosched.c index 5d1bf70e33d..3de89d4690f 100644 --- a/block/noop-iosched.c +++ b/block/noop-iosched.c @@ -59,16 +59,27 @@ noop_latter_request(struct request_queue *q, struct request *rq) return list_entry(rq->queuelist.next, struct request, queuelist); } -static int noop_init_queue(struct request_queue *q) +static int noop_init_queue(struct request_queue *q, struct elevator_type *e) { struct noop_data *nd; + struct elevator_queue *eq; + + eq = elevator_alloc(q, e); + if (!eq) + return -ENOMEM; nd = kmalloc_node(sizeof(*nd), GFP_KERNEL, q->node); - if (!nd) + if (!nd) { + kobject_put(&eq->kobj); return -ENOMEM; + } + eq->elevator_data = nd; INIT_LIST_HEAD(&nd->queue); - q->elevator->elevator_data = nd; + + spin_lock_irq(q->queue_lock); + q->elevator = eq; + spin_unlock_irq(q->queue_lock); return 0; } diff --git a/include/linux/elevator.h b/include/linux/elevator.h index acd0312d46f..306dd8cd0b6 100644 --- a/include/linux/elevator.h +++ b/include/linux/elevator.h @@ -7,6 +7,7 @@ #ifdef CONFIG_BLOCK struct io_cq; +struct elevator_type; typedef int (elevator_merge_fn) (struct request_queue *, struct request **, struct bio *); @@ -35,7 +36,8 @@ typedef void (elevator_put_req_fn) (struct request *); typedef void (elevator_activate_req_fn) (struct request_queue *, struct request *); typedef void (elevator_deactivate_req_fn) (struct request_queue *, struct request *); -typedef int (elevator_init_fn) (struct request_queue *); +typedef int (elevator_init_fn) (struct request_queue *, + struct elevator_type *e); typedef void (elevator_exit_fn) (struct elevator_queue *); struct elevator_ops @@ -155,6 +157,8 @@ extern int elevator_init(struct request_queue *, char *); extern void elevator_exit(struct elevator_queue *); extern int elevator_change(struct request_queue *, const char *); extern bool elv_rq_merge_ok(struct request *, struct bio *); +extern struct elevator_queue *elevator_alloc(struct request_queue *, + struct elevator_type *); /* * Helper functions. |