nbd: change a parameter's type to remove a memcpy call

This memcpy looks so strange, in fact it's merely a pointer dereference, so I
change the parameter's type to refer it more directly, this could make the
memcpy not needed anymore.

In the function nbd_read_stat where nbd_find_request is only once called, the
parameter served should be transformed accordingly.

Signed-off-by: Denis Cheng <crquan@gmail.com>
Cc: Paul Clements <paul.clements@steeleye.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index d7a4215..dc88bcf 100644 (file)
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -231,14 +231,12 @@ error_out:
        return 1;
 }
 
-static struct request *nbd_find_request(struct nbd_device *lo, char *handle)
+static struct request *nbd_find_request(struct nbd_device *lo,
+                                       struct request *xreq)
 {
        struct request *req, *tmp;
-       struct request *xreq;
        int err;
 
-       memcpy(&xreq, handle, sizeof(xreq));
-
        err = wait_event_interruptible(lo->active_wq, lo->active_req != xreq);
        if (unlikely(err))
                goto out;
@@ -293,7 +291,7 @@ static struct request *nbd_read_stat(struct nbd_device *lo)
                goto harderror;
        }
 
-       req = nbd_find_request(lo, reply.handle);
+       req = nbd_find_request(lo, *(struct request **)reply.handle);
        if (unlikely(IS_ERR(req))) {
                result = PTR_ERR(req);
                if (result != -ENOENT)