Re: [RFC,PATCH 3/4] Change synchronize_kernel to _rcu and _sched

[Manfred Spraul]

On Sat, 9 Apr 2005, Francois Romieu wrote:

> Manfred Spraul <manfred@xxxxxxxxxxxxxxxx> :
> > [Jeff added to cc list - it's a network driver question]
> [...]
> > I haven't read the whole driver, but what about
> > 	spin_unlock_wait(&dev->xmit_lock);
> > ?
>
> The race here is a dev->close() against dev->hard_start_xmit() one where
> dev->hard_start_xmit() does not do any locking at all.
>
I always thought that all callers of dev->hard_start_xmit() acquire
dev->xmit_lock before calling hard_start_xmit().

Is that assumption wrong? I think I even rely on that in one of my
drivers.

--
	Manfred

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