From: Denis Cheng 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 Cc: Paul Clements Signed-off-by: Andrew Morton --- drivers/block/nbd.c | 8 +++----- 1 files changed, 3 insertions(+), 5 deletions(-) diff -puN drivers/block/nbd.c~nbd-change-a-parameters-type-to-remove-a-memcpy-call drivers/block/nbd.c --- a/drivers/block/nbd.c~nbd-change-a-parameters-type-to-remove-a-memcpy-call +++ a/drivers/block/nbd.c @@ -235,14 +235,12 @@ 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; @@ -297,7 +295,7 @@ static struct request *nbd_read_stat(str 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) _