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Re: mutexes, IPL, tty locking

On Thu, Oct 22, 2009 at 10:03:13AM -0500, David Young wrote:
> What I really want to know is:
> > Is it more reasonable for the kernel to expect the driver output      
> > routine to restore the IPL, or to expect the tty routines such as     
> > ttywait() to save and restore the IPL across calls to the output      
> > routine?                                                              

I think the mutex_exit() should do it - somehow.
Otherwise this will all crop up again and again ...


David Laight:

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