Commit c5841642 authored by Vasily Tarasov's avatar Vasily Tarasov Committed by Jens Axboe
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[PATCH] block layer: elv_iosched_show should get elv_list_lock 



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

Signed-off-by: default avatarVasily Tarasov <vtaras@openvz.org>
Signed-off-by: default avatarVasily Tarasov <jens.axboe@oracle.com>
parent e6e80f29

block/elevator.c

+2 −2
Original line number Diff line number Diff line
@@ -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;