From: Al Viro
tty->count is decremented only after ->close() had been called and several
tasks can hit it in parallel. As the result, using tty->count to check if
you are the last one is broken. We end up leaving line->tty not reset to
NULL and the next IRQ on that sucker will blow up trying to
From: Al Viro
tty->count is decremented only after ->close() had been called and several
tasks can hit it in parallel. As the result, using tty->count to check if
you are the last one is broken. We end up leaving line->tty not reset to
NULL and the next IRQ on that sucker will blow up trying to
