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SubjectRe: [RFC 2/2] serial/8250.c: Use self-adjusting list for port poll order.
> This code does that by using the previous poll cycles as a hint.
> If a port is idle, it will migrate to the end of the list and
> only have to be checked once.
> Part 1 changed the list to singly-linked to make the list shuffling easier.
> Comments? Please?

Is it really worth the complexity

- PCI ports are shared IRQ always
- Legacy ports are almost never shared IRQ on the LPC bus (and are
increasingly going away)

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