svcrpc: simplify svc_close_all

There's no need to be fooling with XPT_BUSY now that all the threads
are gone.

The list_del_init() here could execute at the same time as the
svc_xprt_enqueue()'s list_add_tail(), with undefined results.  We don't
really care at this point, but it might result in a spurious
list-corruption warning or something.

And svc_close() isn't adding any value; just call svc_delete_xprt()
directly.

Signed-off-by: J. Bruce Fields <bfields@redhat.com>

diff --git a/net/sunrpc/svc_xprt.c b/net/sunrpc/svc_xprt.c
index dd61cd0..8c018df 100644 (file)
--- a/net/sunrpc/svc_xprt.c
+++ b/net/sunrpc/svc_xprt.c
@@ -941,16 +941,16 @@ void svc_close_all(struct list_head *xprt_list)
        struct svc_xprt *xprt;
        struct svc_xprt *tmp;
 
+       /*
+        * The server is shutting down, and no more threads are running.
+        * svc_xprt_enqueue() might still be running, but at worst it
+        * will re-add the xprt to sp_sockets, which will soon get
+        * freed.  So we don't bother with any more locking, and don't
+        * leave the close to the (nonexistent) server threads:
+        */
        list_for_each_entry_safe(xprt, tmp, xprt_list, xpt_list) {
                set_bit(XPT_CLOSE, &xprt->xpt_flags);
-               if (test_bit(XPT_BUSY, &xprt->xpt_flags)) {
-                       /* Waiting to be processed, but no threads left,
-                        * So just remove it from the waiting list
-                        */
-                       list_del_init(&xprt->xpt_ready);
-                       clear_bit(XPT_BUSY, &xprt->xpt_flags);
-               }
-               svc_close_xprt(xprt);
+               svc_delete_xprt(xprt);
        }
 }