> Also for most code in start_request() we dont need lock, we need it only
> for calling block layer helpers, changing/reading IDE_BUSY bit and
> ch->handler, timer and drive->rq.
>
> Also we cannot disable interrupts, because we wont know when drive is
> interrupting us, missed irqs.
Thanks that explains quite a bit.
Cheers,
Zwane Mwaikambo
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