netdev - Re: [net-next:master 98/98] drivers/net/ethernet/myricom/myri10ge/myri10ge.c:1286:34: sparse: cast to restricted _

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Date:	Mon, 3 Dec 2012 12:13:44 -0800
From:	Christopher Li <sparse@...isli.org>
To:	Andrew Gallatin <gallatin@...i.com>
Cc:	Fengguang Wu <fengguang.wu@...el.com>, netdev@...r.kernel.org,
	Stephen Hemminger <shemminger@...tta.com>
Subject: Re: [net-next:master 98/98] drivers/net/ethernet/myricom/myri10ge/myri10ge.c:1286:34:
 sparse: cast to restricted __be16

On Mon, Dec 3, 2012 at 11:21 AM, Andrew Gallatin <gallatin@...i.com> wrote:
> drivers/net/ethernet/myricom/myri10ge/myri10ge.c:1434:35: warning:
> context imbalance in 'myri10ge_intr' - different lock contexts for basic
> block
>
> Which is apparently triggered by using __netif_tx_trylock().
> Is there something I'm missing, or does sparse just not like
> __netif_tx_trylock() because it divides spinlock acquisition and
> release into 2 different functions?
>

Right. Sparse currently does not have cross function analyse.
It will complain if the lock is not balanced with lock split into
different functions.

Chris
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