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[PATCH] block layer: elv_iosched_show should get elv_list_lock

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elv_iosched_show function iterates other elv_list, hence
elv_list_lock should be got.

Signed-off-by: Vasily Tarasov <vtaras@openvz.org>
Signed-off-by: Vasily Tarasov <jens.axboe@oracle.com>
This commit is contained in:
Vasily Tarasov 2006-10-11 13:26:30 +02:00 committed by Jens Axboe
parent e6e80f294c
commit c584164224
1 changed files with 2 additions and 2 deletions
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4
block/elevator.c
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@ -1085,7 +1085,7 @@ ssize_t elv_iosched_show(request_queue_t *q, char *name)
struct list_head *entry;
int len = 0;
spin_lock_irq(q->queue_lock);
spin_lock_irq(&elv_list_lock);
list_for_each(entry, &elv_list) {
struct elevator_type *__e;
@ -1095,7 +1095,7 @@ ssize_t elv_iosched_show(request_queue_t *q, char *name)
else
len += sprintf(name+len, "%s ", __e->elevator_name);
}
spin_unlock_irq(q->queue_lock);
spin_unlock_irq(&elv_list_lock);
len += sprintf(len+name, "\n");
return len;