[PATCH] prevent "oops" in RPC debugging code

[Chuck Lever]

Description:
  rpc_show_tasks is invoked when changing the RPC client debug mode.
  recent changes have allowed tk_msg.rpc_proc to be NULL, which caused
  rpc_show_tasks to "oops."  the following change fixes that, and
  provides a little extra clean up as well.

Apply Against:
  2.5.49

Test status:
  Compiles, links, boots.  Oops does not recur.

diff -Naur 07-counters/net/sunrpc/sched.c 08-debug-oops/net/sunrpc/sched.c
--- 07-counters/net/sunrpc/sched.c	Fri Nov 22 16:40:44 2002
+++ 08-debug-oops/net/sunrpc/sched.c	Mon Nov 25 13:33:24 2002
@@ -1123,11 +1123,12 @@
 		"-rpcwait -action- --exit--\n");
 	alltask_for_each(t, le, &all_tasks)
 		printk("%05d %04d %04x %06d %8p %6d %8p %08ld %8s %8p %8p\n",
-			t->tk_pid, t->tk_msg.rpc_proc->p_proc,
+			t->tk_pid,
+			(t->tk_msg.rpc_proc ? t->tk_msg.rpc_proc->p_proc : -1),
 			t->tk_flags, t->tk_status,
 			t->tk_client, t->tk_client->cl_prog,
 			t->tk_rqstp, t->tk_timeout,
-			t->tk_rpcwait ? rpc_qname(t->tk_rpcwait) : " <NULL> ",
+			rpc_qname(t->tk_rpcwait),
 			t->tk_action, t->tk_exit);
 	spin_unlock(&rpc_sched_lock);
 }