tipc: redefine 'started' flag in struct link to bitmap

Currently, the 'started' field in struct tipc_link represents only a
binary state, 'started' or 'not started'. We need it to represent
more link execution states in the coming commits in this series.
Hence, we rename the field to 'flags', and define the current
started/non-started state to be represented by the LSB bit of
that field.

Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/tipc/link.c b/net/tipc/link.c
index 424e9f3..2070d03 100644
--- a/net/tipc/link.c
+++ b/net/tipc/link.c
@@ -500,7 +500,7 @@
 	struct tipc_link *other;
 	u32 cont_intv = l_ptr->continuity_interval;
 
-	if (!l_ptr->started && (event != STARTING_EVT))
+	if (!(l_ptr->flags & LINK_STARTED) && (event != STARTING_EVT))
 		return;		/* Not yet. */
 
 	/* Check whether changeover is going on */
@@ -626,7 +626,7 @@
 			link_set_timer(l_ptr, cont_intv);
 			break;
 		case STARTING_EVT:
-			l_ptr->started = 1;
+			l_ptr->flags |= LINK_STARTED;
 			/* fall through */
 		case TIMEOUT_EVT:
 			tipc_link_send_proto_msg(l_ptr, RESET_MSG, 0, 0, 0, 0, 0);