block: convert to pos and nr_sectors accessors

With recent cleanups, there is no place where low level driver
directly manipulates request fields.  This means that the 'hard'
request fields always equal the !hard fields.  Convert all
rq->sectors, nr_sectors and current_nr_sectors references to
accessors.

While at it, drop superflous blk_rq_pos() < 0 test in swim.c.

[ Impact: use pos and nr_sectors accessors ]

Signed-off-by: Tejun Heo <tj@kernel.org>
Acked-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Tested-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Acked-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Acked-by: Mike Miller <mike.miller@hp.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Cc: Borislav Petkov <petkovbb@googlemail.com>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Eric Moore <Eric.Moore@lsi.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Pete Zaitcev <zaitcev@redhat.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Paul Clements <paul.clements@steeleye.com>
Cc: Tim Waugh <tim@cyberelk.net>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Alex Dubov <oakad@yahoo.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Dario Ballabio <ballabio_dario@emc.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: unsik Kim <donari75@gmail.com>
Cc: Laurent Vivier <Laurent@lvivier.info>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index a9ab8be9d92f..977a57377930 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -110,7 +110,7 @@ static void nbd_end_request(struct request *req)
                         req, error ? "failed" : "done");
 
         spin_lock_irqsave(q->queue_lock, flags);
-        __blk_end_request(req, error, req->nr_sectors << 9);
+        __blk_end_request(req, error, blk_rq_sectors(req) << 9);
         spin_unlock_irqrestore(q->queue_lock, flags);
 }
 
@@ -231,19 +231,19 @@ static int nbd_send_req(struct nbd_device *lo, struct request *req)
 {
         int result, flags;
         struct nbd_request request;
-        unsigned long size = req->nr_sectors << 9;
+        unsigned long size = blk_rq_sectors(req) << 9;
 
         request.magic = htonl(NBD_REQUEST_MAGIC);
         request.type = htonl(nbd_cmd(req));
-        request.from = cpu_to_be64((u64) req->sector << 9);
+        request.from = cpu_to_be64((u64)blk_rq_pos(req) << 9);
         request.len = htonl(size);
         memcpy(request.handle, &req, sizeof(req));
 
-        dprintk(DBG_TX, "%s: request %p: sending control (%s@%llu,%luB)\n",
+        dprintk(DBG_TX, "%s: request %p: sending control (%s@%llu,%uB)\n",
                         lo->disk->disk_name, req,
                         nbdcmd_to_ascii(nbd_cmd(req)),
-                        (unsigned long long)req->sector << 9,
-                        req->nr_sectors << 9);
+                        (unsigned long long)blk_rq_pos(req) << 9,
+                        blk_rq_sectors(req) << 9);
         result = sock_xmit(lo, 1, &request, sizeof(request),
                         (nbd_cmd(req) == NBD_CMD_WRITE) ? MSG_MORE : 0);
         if (result <= 0) {