[Lguest] [PATCH 4/5] lguest: use KVM hypercalls

[Patrick McHardy]

Herbert Xu wrote:
> On Wed, Apr 15, 2009 at 04:36:10PM +0800, Herbert Xu wrote:
>> Let me whip up a patch.
> 
> tun: Fix sk_sleep races when attaching/detaching
> 
> As the sk_sleep wait queue actually lives in tfile, which may be
> detached from the tun device, bad things will happen when we use
> sk_sleep after detaching.
> 
> Since the tun device is the persistent data structure here (when
> requested by the user), it makes much more sense to have the wait
> queue live there.  There is no reason to have it in tfile at all
> since the only time we can wait is if we have a tun attached.
> In fact we already have a wait queue in tun_struct, so we might
> as well use it.

Tested and works fine, thanks Herbert.