static struct elevator_type *elevator_find(const char *name)
{
struct elevator_type *e;
- struct list_head *entry;
-
- list_for_each(entry, &elv_list) {
-
- e = list_entry(entry, struct elevator_type, list);
+ list_for_each_entry(e, &elv_list, list) {
if (!strcmp(e->elevator_name, name))
return e;
}
{
struct elevator_type *e;
- spin_lock_irq(&elv_list_lock);
+ spin_lock(&elv_list_lock);
e = elevator_find(name);
if (e && !try_module_get(e->elevator_owner))
e = NULL;
- spin_unlock_irq(&elv_list_lock);
+ spin_unlock(&elv_list_lock);
return e;
}
list_for_each_prev(entry, &q->queue_head) {
struct request *pos = list_entry_rq(entry);
+ if (rq_data_dir(rq) != rq_data_dir(pos))
+ break;
if (pos->cmd_flags & (REQ_SOFTBARRIER|REQ_HARDBARRIER|REQ_STARTED))
break;
if (rq->sector >= boundary) {
int elv_register(struct elevator_type *e)
{
- spin_lock_irq(&elv_list_lock);
+ char *def = "";
+
+ spin_lock(&elv_list_lock);
BUG_ON(elevator_find(e->elevator_name));
list_add_tail(&e->list, &elv_list);
- spin_unlock_irq(&elv_list_lock);
+ spin_unlock(&elv_list_lock);
- printk(KERN_INFO "io scheduler %s registered", e->elevator_name);
if (!strcmp(e->elevator_name, chosen_elevator) ||
(!*chosen_elevator &&
!strcmp(e->elevator_name, CONFIG_DEFAULT_IOSCHED)))
- printk(" (default)");
- printk("\n");
+ def = " (default)";
+
+ printk(KERN_INFO "io scheduler %s registered%s\n", e->elevator_name, def);
return 0;
}
EXPORT_SYMBOL_GPL(elv_register);
read_unlock(&tasklist_lock);
}
- spin_lock_irq(&elv_list_lock);
+ spin_lock(&elv_list_lock);
list_del_init(&e->list);
- spin_unlock_irq(&elv_list_lock);
+ spin_unlock(&elv_list_lock);
}
EXPORT_SYMBOL_GPL(elv_unregister);
{
elevator_t *e = q->elevator;
struct elevator_type *elv = e->elevator_type;
- struct list_head *entry;
+ struct elevator_type *__e;
int len = 0;
- spin_lock_irq(&elv_list_lock);
- list_for_each(entry, &elv_list) {
- struct elevator_type *__e;
-
- __e = list_entry(entry, struct elevator_type, list);
+ spin_lock(&elv_list_lock);
+ list_for_each_entry(__e, &elv_list, list) {
if (!strcmp(elv->elevator_name, __e->elevator_name))
len += sprintf(name+len, "[%s] ", elv->elevator_name);
else
len += sprintf(name+len, "%s ", __e->elevator_name);
}
- spin_unlock_irq(&elv_list_lock);
+ spin_unlock(&elv_list_lock);
len += sprintf(len+name, "\n");
return len;