diff options
author | Tejun Heo <tj@kernel.org> | 2011-12-14 00:33:41 +0100 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2011-12-14 00:33:41 +0100 |
commit | 22f746e235a5cbee2a6ca9887b1be2aa7d31fe71 (patch) | |
tree | a9786fe9fdb994b5ff69794023e6e3e48e39e0b0 /block/elevator.c | |
parent | f8fc877d3c1f10457d0d73d8540a0c51a1fa718a (diff) | |
download | op-kernel-dev-22f746e235a5cbee2a6ca9887b1be2aa7d31fe71.zip op-kernel-dev-22f746e235a5cbee2a6ca9887b1be2aa7d31fe71.tar.gz |
block: remove elevator_queue->ops
elevator_queue->ops points to the same ops struct ->elevator_type.ops
is pointing to. The only effect of caching it in elevator_queue is
shorter notation - it doesn't save any indirect derefence.
Relocate elevator_type->list which used only during module init/exit
to the end of the structure, rename elevator_queue->elevator_type to
->type, and replace elevator_queue->ops with elevator_queue->type.ops.
This doesn't introduce any functional difference.
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/elevator.c')
-rw-r--r-- | block/elevator.c | 74 |
1 files changed, 36 insertions, 38 deletions
diff --git a/block/elevator.c b/block/elevator.c index a16c2d1..31ffe76 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -61,8 +61,8 @@ static int elv_iosched_allow_merge(struct request *rq, struct bio *bio) struct request_queue *q = rq->q; struct elevator_queue *e = q->elevator; - if (e->ops->elevator_allow_merge_fn) - return e->ops->elevator_allow_merge_fn(q, rq, bio); + if (e->type->ops.elevator_allow_merge_fn) + return e->type->ops.elevator_allow_merge_fn(q, rq, bio); return 1; } @@ -171,7 +171,7 @@ static struct elevator_type *elevator_get(const char *name) static int elevator_init_queue(struct request_queue *q, struct elevator_queue *eq) { - eq->elevator_data = eq->ops->elevator_init_fn(q); + eq->elevator_data = eq->type->ops.elevator_init_fn(q); if (eq->elevator_data) return 0; return -ENOMEM; @@ -203,8 +203,7 @@ static struct elevator_queue *elevator_alloc(struct request_queue *q, if (unlikely(!eq)) goto err; - eq->ops = &e->ops; - eq->elevator_type = e; + eq->type = e; kobject_init(&eq->kobj, &elv_ktype); mutex_init(&eq->sysfs_lock); @@ -228,7 +227,7 @@ static void elevator_release(struct kobject *kobj) struct elevator_queue *e; e = container_of(kobj, struct elevator_queue, kobj); - elevator_put(e->elevator_type); + elevator_put(e->type); kfree(e->hash); kfree(e); } @@ -288,9 +287,8 @@ EXPORT_SYMBOL(elevator_init); void elevator_exit(struct elevator_queue *e) { mutex_lock(&e->sysfs_lock); - if (e->ops->elevator_exit_fn) - e->ops->elevator_exit_fn(e); - e->ops = NULL; + if (e->type->ops.elevator_exit_fn) + e->type->ops.elevator_exit_fn(e); mutex_unlock(&e->sysfs_lock); kobject_put(&e->kobj); @@ -500,8 +498,8 @@ int elv_merge(struct request_queue *q, struct request **req, struct bio *bio) return ELEVATOR_BACK_MERGE; } - if (e->ops->elevator_merge_fn) - return e->ops->elevator_merge_fn(q, req, bio); + if (e->type->ops.elevator_merge_fn) + return e->type->ops.elevator_merge_fn(q, req, bio); return ELEVATOR_NO_MERGE; } @@ -544,8 +542,8 @@ void elv_merged_request(struct request_queue *q, struct request *rq, int type) { struct elevator_queue *e = q->elevator; - if (e->ops->elevator_merged_fn) - e->ops->elevator_merged_fn(q, rq, type); + if (e->type->ops.elevator_merged_fn) + e->type->ops.elevator_merged_fn(q, rq, type); if (type == ELEVATOR_BACK_MERGE) elv_rqhash_reposition(q, rq); @@ -559,8 +557,8 @@ void elv_merge_requests(struct request_queue *q, struct request *rq, struct elevator_queue *e = q->elevator; const int next_sorted = next->cmd_flags & REQ_SORTED; - if (next_sorted && e->ops->elevator_merge_req_fn) - e->ops->elevator_merge_req_fn(q, rq, next); + if (next_sorted && e->type->ops.elevator_merge_req_fn) + e->type->ops.elevator_merge_req_fn(q, rq, next); elv_rqhash_reposition(q, rq); @@ -577,8 +575,8 @@ void elv_bio_merged(struct request_queue *q, struct request *rq, { struct elevator_queue *e = q->elevator; - if (e->ops->elevator_bio_merged_fn) - e->ops->elevator_bio_merged_fn(q, rq, bio); + if (e->type->ops.elevator_bio_merged_fn) + e->type->ops.elevator_bio_merged_fn(q, rq, bio); } void elv_requeue_request(struct request_queue *q, struct request *rq) @@ -604,12 +602,12 @@ void elv_drain_elevator(struct request_queue *q) lockdep_assert_held(q->queue_lock); - while (q->elevator->ops->elevator_dispatch_fn(q, 1)) + while (q->elevator->type->ops.elevator_dispatch_fn(q, 1)) ; if (q->nr_sorted && printed++ < 10) { printk(KERN_ERR "%s: forced dispatching is broken " "(nr_sorted=%u), please report this\n", - q->elevator->elevator_type->elevator_name, q->nr_sorted); + q->elevator->type->elevator_name, q->nr_sorted); } } @@ -698,7 +696,7 @@ void __elv_add_request(struct request_queue *q, struct request *rq, int where) * rq cannot be accessed after calling * elevator_add_req_fn. */ - q->elevator->ops->elevator_add_req_fn(q, rq); + q->elevator->type->ops.elevator_add_req_fn(q, rq); break; case ELEVATOR_INSERT_FLUSH: @@ -727,8 +725,8 @@ struct request *elv_latter_request(struct request_queue *q, struct request *rq) { struct elevator_queue *e = q->elevator; - if (e->ops->elevator_latter_req_fn) - return e->ops->elevator_latter_req_fn(q, rq); + if (e->type->ops.elevator_latter_req_fn) + return e->type->ops.elevator_latter_req_fn(q, rq); return NULL; } @@ -736,8 +734,8 @@ struct request *elv_former_request(struct request_queue *q, struct request *rq) { struct elevator_queue *e = q->elevator; - if (e->ops->elevator_former_req_fn) - return e->ops->elevator_former_req_fn(q, rq); + if (e->type->ops.elevator_former_req_fn) + return e->type->ops.elevator_former_req_fn(q, rq); return NULL; } @@ -745,8 +743,8 @@ int elv_set_request(struct request_queue *q, struct request *rq, gfp_t gfp_mask) { struct elevator_queue *e = q->elevator; - if (e->ops->elevator_set_req_fn) - return e->ops->elevator_set_req_fn(q, rq, gfp_mask); + if (e->type->ops.elevator_set_req_fn) + return e->type->ops.elevator_set_req_fn(q, rq, gfp_mask); rq->elevator_private[0] = NULL; return 0; @@ -756,16 +754,16 @@ void elv_put_request(struct request_queue *q, struct request *rq) { struct elevator_queue *e = q->elevator; - if (e->ops->elevator_put_req_fn) - e->ops->elevator_put_req_fn(rq); + if (e->type->ops.elevator_put_req_fn) + e->type->ops.elevator_put_req_fn(rq); } int elv_may_queue(struct request_queue *q, int rw) { struct elevator_queue *e = q->elevator; - if (e->ops->elevator_may_queue_fn) - return e->ops->elevator_may_queue_fn(q, rw); + if (e->type->ops.elevator_may_queue_fn) + return e->type->ops.elevator_may_queue_fn(q, rw); return ELV_MQUEUE_MAY; } @@ -800,8 +798,8 @@ void elv_completed_request(struct request_queue *q, struct request *rq) if (blk_account_rq(rq)) { q->in_flight[rq_is_sync(rq)]--; if ((rq->cmd_flags & REQ_SORTED) && - e->ops->elevator_completed_req_fn) - e->ops->elevator_completed_req_fn(q, rq); + e->type->ops.elevator_completed_req_fn) + e->type->ops.elevator_completed_req_fn(q, rq); } } @@ -819,7 +817,7 @@ elv_attr_show(struct kobject *kobj, struct attribute *attr, char *page) e = container_of(kobj, struct elevator_queue, kobj); mutex_lock(&e->sysfs_lock); - error = e->ops ? entry->show(e, page) : -ENOENT; + error = e->type ? entry->show(e, page) : -ENOENT; mutex_unlock(&e->sysfs_lock); return error; } @@ -837,7 +835,7 @@ elv_attr_store(struct kobject *kobj, struct attribute *attr, e = container_of(kobj, struct elevator_queue, kobj); mutex_lock(&e->sysfs_lock); - error = e->ops ? entry->store(e, page, length) : -ENOENT; + error = e->type ? entry->store(e, page, length) : -ENOENT; mutex_unlock(&e->sysfs_lock); return error; } @@ -858,7 +856,7 @@ int __elv_register_queue(struct request_queue *q, struct elevator_queue *e) error = kobject_add(&e->kobj, &q->kobj, "%s", "iosched"); if (!error) { - struct elv_fs_entry *attr = e->elevator_type->elevator_attrs; + struct elv_fs_entry *attr = e->type->elevator_attrs; if (attr) { while (attr->attr.name) { if (sysfs_create_file(&e->kobj, &attr->attr)) @@ -959,7 +957,7 @@ static int elevator_switch(struct request_queue *q, struct elevator_type *new_e) elevator_exit(old_elevator); elv_quiesce_end(q); - blk_add_trace_msg(q, "elv switch: %s", e->elevator_type->elevator_name); + blk_add_trace_msg(q, "elv switch: %s", e->type->elevator_name); return 0; @@ -993,7 +991,7 @@ int elevator_change(struct request_queue *q, const char *name) return -EINVAL; } - if (!strcmp(elevator_name, q->elevator->elevator_type->elevator_name)) { + if (!strcmp(elevator_name, q->elevator->type->elevator_name)) { elevator_put(e); return 0; } @@ -1028,7 +1026,7 @@ ssize_t elv_iosched_show(struct request_queue *q, char *name) if (!q->elevator || !blk_queue_stackable(q)) return sprintf(name, "none\n"); - elv = e->elevator_type; + elv = e->type; spin_lock(&elv_list_lock); list_for_each_entry(__e, &elv_list, list) { |