WorkStruct: Separate delayable and non-delayable events.

Separate delayable work items from non-delayable work items be splitting them
into a separate structure (delayed_work), which incorporates a work_struct and
the timer_list removed from work_struct.

The work_struct struct is huge, and this limits it's usefulness.  On a 64-bit
architecture it's nearly 100 bytes in size.  This reduces that by half for the
non-delayable type of event.

Signed-Off-By: David Howells <dhowells@redhat.com>
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 9a0b41a..97be3f7 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -837,7 +837,8 @@
 		INIT_LIST_HEAD(&rpci->pipe);
 		rpci->pipelen = 0;
 		init_waitqueue_head(&rpci->waitq);
-		INIT_WORK(&rpci->queue_timeout, rpc_timeout_upcall_queue, rpci);
+		INIT_DELAYED_WORK(&rpci->queue_timeout,
+				    rpc_timeout_upcall_queue, rpci);
 		rpci->ops = NULL;
 	}
 }