> Would someone please tell me what is this tty->poll_wait for?? It breaks
> driver backward compatibility in the 2.2.x kernel series (i.e. the driver
> that compiles in 2.2.15 does not compile in previous 2.2.x kernels), so I
> hope this new tty_struct field stands for something important.
It fixes a bug in lots of the tty drivers that were adding two entries to
the poll queue which is not allowed.
> In time: it's not present in 2.3.99-pre6 (why not, assuming it's
> important?).
I've yet to look at that in detail, or the alternate proposal. Right now anyone
can get root or crash 2.3.99pre using that bug.
Alan
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