Re: [PATCH] x86: Don't write io_apic ID if it is not changed

[Eric W. Biederman]

Yinghai Lu <yinghai@xxxxxxxxxx> writes:

> For 32bit mptable path, setup_ids_from_mpc() always write io apic id
> register, even there is no change needed.
>
> So try to do that when they are different bewteen reading out and
> mptable

What is the advantage of not writing the value?

Eric

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