rxrpc: Split the receive code

Split the code that handles packet reception in softirq mode as a prelude
to moving all the packet processing beyond routing to the appropriate call
and setting up of a new call out into process context.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org

net/rxrpc/Makefile

@@ -16,6 +16,7 @@ rxrpc-y := \
 	conn_service.o \
 	input.o \
 	insecure.o \
+	io_thread.o \
 	key.o \
 	local_event.o \
 	local_object.o \

net/rxrpc/ar-internal.h

@@ -946,6 +946,13 @@ void rxrpc_unpublish_service_conn(struct rxrpc_connection *);
 /*
  * input.c
  */
+void rxrpc_input_call_packet(struct rxrpc_call *, struct sk_buff *);
+void rxrpc_input_implicit_end_call(struct rxrpc_sock *, struct rxrpc_connection *,
+				   struct rxrpc_call *);
+
+/*
+ * io_thread.c
+ */
 int rxrpc_input_packet(struct sock *, struct sk_buff *);
 
 /*