centos man page for blk_release_queue

BLK_RELEASE_QUEUE(9)						   Block Devices					      BLK_RELEASE_QUEUE(9)

NAME
       blk_release_queue - release a struct request_queue when it is no longer needed

SYNOPSIS
       void blk_release_queue(struct kobject * kobj);

ARGUMENTS
       kobj
	   the kobj belonging to the request queue to be released

DESCRIPTION
       blk_release_queue is the pair to blk_init_queue or blk_queue_make_request. It should be called when a request queue is being released;
       typically when a block device is being de-registered. Currently, its primary task it to free all the struct request structures that were
       allocated to the queue and the queue itself.

CAVEAT
       Hopefully the low level driver will have finished any outstanding requests first...

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						      BLK_RELEASE_QUEUE(9)