centos man page for blk_queue_end_tag

BLK_QUEUE_END_TAG(9)						   Block Devices					      BLK_QUEUE_END_TAG(9)

NAME
       blk_queue_end_tag - end tag operations for a request

SYNOPSIS
       void blk_queue_end_tag(struct request_queue * q, struct request * rq);

ARGUMENTS
       q
	   the request queue for the device

       rq
	   the request that has completed

DESCRIPTION
       Typically called when end_that_request_first returns 0, meaning all transfers have been done for a request. It's important to call this
       function before end_that_request_last, as that will put the request back on the free list thus corrupting the internal tag list.

NOTES
       queue lock must be held.

COPYRIGHT
Kernel Hackers Manual 3.10					     June 2014						      BLK_QUEUE_END_TAG(9)