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block: remove request ref_count

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This reference count has been around since before git history, but the only
place where it's used is in blk_execute_rq, and ther it is entirely useless
as it is incremented before submitting the request and decremented in the
end_io handler before waking up the submitter thread.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2013-10-04 06:49:11 -07:00
committed by Jens Axboe
parent 5953316dbf
commit 71fe07d040
3 changed files with 0 additions and 12 deletions
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2
include/linux/blkdev.h
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@@ -160,8 +160,6 @@ struct request {
unsigned short ioprio;
int ref_count;
void *special; /* opaque pointer available for LLD use */
char *buffer; /* kaddr of the current segment if available */