sunrpc: eliminate the XPT_DETACHED flag

All it does is indicate whether a xprt has already been deleted from
a list or not, which is unnecessary since we use list_del_init and it's
always set and checked under the sv_lock anyway.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>

include/linux/sunrpc/svc_xprt.h

@@ -63,10 +63,9 @@ struct svc_xprt {
 #define	XPT_CHNGBUF	7		/* need to change snd/rcv buf sizes */
 #define	XPT_DEFERRED	8		/* deferred request pending */
 #define	XPT_OLD		9		/* used for xprt aging mark+sweep */
-#define	XPT_DETACHED	10		/* detached from tempsocks list */
-#define XPT_LISTENER	11		/* listening endpoint */
-#define XPT_CACHE_AUTH	12		/* cache auth info */
-#define XPT_LOCAL	13		/* connection from loopback interface */
+#define XPT_LISTENER	10		/* listening endpoint */
+#define XPT_CACHE_AUTH	11		/* cache auth info */
+#define XPT_LOCAL	12		/* connection from loopback interface */
 
 	struct svc_serv		*xpt_server;	/* service for transport */
 	atomic_t    	    	xpt_reserved;	/* space on outq that is rsvd */

net/sunrpc/svc_xprt.c

@@ -884,7 +884,6 @@ static void svc_age_temp_xprts(unsigned long closure)
 			continue;
 		list_del_init(le);
 		set_bit(XPT_CLOSE, &xprt->xpt_flags);
-		set_bit(XPT_DETACHED, &xprt->xpt_flags);
 		dprintk("queuing xprt %p for closing\n", xprt);
 
 		/* a thread will dequeue and close it soon */
@@ -924,7 +923,6 @@ static void svc_delete_xprt(struct svc_xprt *xprt)
 	xprt->xpt_ops->xpo_detach(xprt);
 
 	spin_lock_bh(&serv->sv_lock);
-	if (!test_and_set_bit(XPT_DETACHED, &xprt->xpt_flags))
 	list_del_init(&xprt->xpt_list);
 	WARN_ON_ONCE(!list_empty(&xprt->xpt_ready));
 	if (test_bit(XPT_TEMP, &xprt->xpt_flags))