>> Looking at the call paths assign_irq_vector() can get called from, I
>> would think this function, namely as it's using static variables,
>> lacks synchronization - is there any (hidden) reason this is not
>> needed here?
>It is only called during system initialization which is single threaded.
>If someone added ioapic hotplug they would need to do something about
>this.
Hmm, as I looked through this I expected this to be possibly called also later, as it seems to be on paths reachable
from exported functions (which clearly can be called only after the single-threaded phase is over.
Jan
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