[PATCH] knfsd: Don't assume a reader on an RPC cache channel at statup.

Each cache channel remembers if there was a reader recently.
If there wasn't, then it doesn't bother with an up-call.
Currently, it initialises thinking there was a reader
recently incase the reader starts shortly afterwards.  However
this causes problems when a reader doesn't start soon, and
isn't necessary as the reader can easily be started before
the cache is initialised (e.g. before nfsd is started).

net/sunrpc/cache.c

@@ -183,7 +183,7 @@ void cache_register(struct cache_detail *cd)
 	cd->nextcheck = 0;
 	cd->entries = 0;
 	atomic_set(&cd->readers, 0);
-	cd->last_close = get_seconds();
+	cd->last_close = 0;
 	list_add(&cd->others, &cache_list);
 	spin_unlock(&cache_list_lock);
 }