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block: implement an unprep function corresponding directly to prep

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Reviewed-by: FUJITA Tomonori <[email protected]>

Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
James Bottomley 2010-07-01 19:49:17 +09:00 • committed by Jens Axboe
commit 28018c242a
4 changed files with 47 additions and 1 deletions
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17
block/blk-settings.c
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@ -36,6 +36,23 @@ void blk_queue_prep_rq(struct request_queue *q, prep_rq_fn *pfn)
}
EXPORT_SYMBOL(blk_queue_prep_rq);
/**
* blk_queue_unprep_rq - set an unprepare_request function for queue
* @q: queue
* @ufn: unprepare_request function
*
* It's possible for a queue to register an unprepare_request callback
* which is invoked before the request is finally completed. The goal
* of the function is to deallocate any data that was allocated in the
* prepare_request callback.
*
*/
void blk_queue_unprep_rq(struct request_queue *q, unprep_rq_fn *ufn)
{
q->unprep_rq_fn = ufn;
}
EXPORT_SYMBOL(blk_queue_unprep_rq);
/**
* blk_queue_merge_bvec - set a merge_bvec function for queue
* @q: queue