AcoSail/kernel_optimize_test
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[PATCH] elevator: elv_list_lock does not need irq disabling

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It's never grabbed from irq context, so just make it plain spin_lock().

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
This commit is contained in:
Jens Axboe 2007-04-26 14:41:53 +02:00 committed by Jens Axboe
parent 5972511b77
commit 2a12dcd71a
1 changed files with 9 additions and 8 deletions
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17
block/elevator.c
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@ -134,13 +134,13 @@ static struct elevator_type *elevator_get(const char *name)
{
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;
}
@ -965,10 +965,11 @@ void elv_unregister_queue(struct request_queue *q)
int elv_register(struct elevator_type *e)
{
char *def = "";
spin_lock_irq(&elv_list_lock);
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);
if (!strcmp(e->elevator_name, chosen_elevator) ||
(!*chosen_elevator &&
@ -998,9 +999,9 @@ void elv_unregister(struct elevator_type *e)
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);
@ -1118,7 +1119,7 @@ ssize_t elv_iosched_show(request_queue_t *q, char *name)
struct list_head *entry;
int len = 0;
spin_lock_irq(&elv_list_lock);
spin_lock(&elv_list_lock);
list_for_each(entry, &elv_list) {
struct elevator_type *__e;
@ -1128,7 +1129,7 @@ ssize_t elv_iosched_show(request_queue_t *q, char *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;