NFS nonzero preempt_count 1/2

[William Lee Irwin III]

When unmounting an NFS filesystem, I saw printk's reporting that NFS
daemons exited with nonzero preempt_counts. Fixing this up so they
no longer give the warning seems like a good idea.

Patch attempting to do this for rpciod below.

Cheers,
Bill

===== net/sunrpc/sched.c 1.15 vs edited =====
--- 1.15/net/sunrpc/sched.c	Fri May  3 18:52:12 2002
+++ edited/net/sunrpc/sched.c	Tue Jul 16 02:00:32 2002
@@ -1088,6 +1088,7 @@
 	wake_up(assassin);
 
 	dprintk("RPC: rpciod exiting\n");
+	unlock_kernel();
 	MOD_DEC_USE_COUNT;
 	return 0;
 }