block: remove request ref_count

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>

1 files changed, 0 insertions, 2 deletions

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index f5c7596c93dd..0a8da96274c3 100644
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -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 */