9p: remove unnecessary tag field from p9_req_t structure

This removes the vestigial tag field from the p9_req_t structure.
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

include/net/9p/client.h

@@ -81,7 +81,6 @@ enum p9_req_status_t {
  * @tc: the request fcall structure
  * @rc: the response fcall structure
  * @aux: transport specific data (provided for trans_fd migration)
- * @tag: tag on request (BUG: redundant)
  * @req_list: link for higher level objects to chain requests
  *
  * Transport use an array to track outstanding requests
@@ -104,7 +103,6 @@ struct p9_req_t {
 	u16 flush_tag;
 	void *aux;
 
-	int tag;
 	struct list_head req_list;
 };
 

net/9p/trans_fd.c

@@ -672,7 +672,7 @@ static int p9_fd_cancel(struct p9_client *client, struct p9_req_t *req)
 	struct p9_trans_fd *ts = client->trans;
 	struct p9_conn *m = ts->conn;
 
-	P9_DPRINTK(P9_DEBUG_MUX, "mux %p req %p tag %d\n", m, req, req->tag);
+	P9_DPRINTK(P9_DEBUG_MUX, "mux %p req %p\n", m, req);
 
 	spin_lock(&client->lock);
 	list_del(&req->req_list);