netfs: Rearrange netfs_io_subrequest to put request pointer first

Rearrange the netfs_io_subrequest struct to put the netfs_io_request
pointer (rreq) first.  This then allows netfs_io_subrequest to be put in a
union with a pointer to a wrapper around netfs_io_request.  This will be
useful in the future for cifs and maybe ceph.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Steve French <sfrench@samba.org>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: Rohith Surabattula <rohiths.msft@gmail.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-cifs@vger.kernel.org
cc: linux-cachefs@redhat.com
cc: linux-fsdevel@vger.kernel.org
cc: linux-mm@kvack.org

diff --git a/include/linux/netfs.h b/include/linux/netfs.h
index 852956aa3c4bb4952db03fdc0f99bafe98fec358..d3bac60fcd6f38ebe8c0f9ffc06c554ad29035cb 100644 (file)
--- a/include/linux/netfs.h
+++ b/include/linux/netfs.h
@@ -204,8 +204,8 @@ struct netfs_cache_resources {
  * the pages it points to can be relied on to exist for the duration.
  */
 struct netfs_io_subrequest {
-       struct work_struct      work;
        struct netfs_io_request *rreq;          /* Supervising I/O request */
+       struct work_struct      work;
        struct list_head        rreq_link;      /* Link in rreq->subrequests */
        struct iov_iter         io_iter;        /* Iterator for this subrequest */
        loff_t                  start;          /* Where to start the I/O */