[RFC PATCH 4/5] hvc_console: Add tty window resizing

[Alan Cox]

> Since tty_do_resize() cannot be called holding the hp spinlock; the code uses
> now tty_kref_get/put to keep track of the tty object. I am not sure if the
> use of the kref's is correct here, so please let me know if there is a better
> solution.

That looks right to me, hp->tty can go NULL but the tty object itself
will still have a reference even if the asynchronous events kick off late