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| author | Tejun Heo <tj@kernel.org> | 2009-04-28 13:06:10 +0900 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-04-28 08:14:51 +0200 |
| commit | f81f2f7c9fee307e371f37424577d46f9eaf8692 (patch) | |
| tree | 75bb4afd8690847234d502ad244d90c8c20a7bc6 | |
| parent | 4d6c84d91d1a539ebc47d1a36a35e9390ba11fdc (diff) | |
| download | linux-f81f2f7c9fee307e371f37424577d46f9eaf8692.tar.gz linux-f81f2f7c9fee307e371f37424577d46f9eaf8692.tar.bz2 linux-f81f2f7c9fee307e371f37424577d46f9eaf8692.zip | |
ubd: drop unnecessary rq->sector manipulation
ubd curiously updates rq->sector while issuing the request in multiple
pieces. Don't do it and simply use local copy of sector.
[ Impact: cleanup ]
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
| -rw-r--r-- | arch/um/drivers/ubd_kern.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c index 36ca9fa89d05..433012764a37 100644 --- a/arch/um/drivers/ubd_kern.c +++ b/arch/um/drivers/ubd_kern.c @@ -1222,7 +1222,8 @@ static void do_ubd_request(struct request_queue *q) { struct io_thread_req *io_req; struct request *req; - int n, last_sectors; + sector_t sector; + int n; while(1){ struct ubd *dev = q->queuedata; @@ -1238,11 +1239,10 @@ static void do_ubd_request(struct request_queue *q) } req = dev->request; - last_sectors = 0; + sector = req->sector; while(dev->start_sg < dev->end_sg){ struct scatterlist *sg = &dev->sg[dev->start_sg]; - req->sector += last_sectors; io_req = kmalloc(sizeof(struct io_thread_req), GFP_ATOMIC); if(io_req == NULL){ @@ -1251,10 +1251,10 @@ static void do_ubd_request(struct request_queue *q) return; } prepare_request(req, io_req, - (unsigned long long) req->sector << 9, + (unsigned long long)sector << 9, sg->offset, sg->length, sg_page(sg)); - last_sectors = sg->length >> 9; + sector += sg->length >> 9; n = os_write_file(thread_fd, &io_req, sizeof(struct io_thread_req *)); if(n != sizeof(struct io_thread_req *)){ |