netdev - Potential locking issue in sunrpc

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Date:	Thu, 30 Jun 2011 16:12:43 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	netdev <netdev@...r.kernel.org>
Subject: Potential locking issue in sunrpc

This method in sched.c says we should have a lock for ASYNC

/*
  * Make an RPC task runnable.
  *
  * Note: If the task is ASYNC, this must be called with
  * the spinlock held to protect the wait queue operation.
  */
static void rpc_make_runnable(struct rpc_task *task)

However, I don't think the lock is being taken for
the call path starting with rpcb_call_async in
rpcb_clnt.c:

rpcb_call_async
rpc_run_task
rpc_execute
rpc_make_runnable

Is the comment on the make_runnable method wrong, or are we missing locking?

Thanks,
Ben

-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com
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