Apologies: you are absolutely correct, disregard my crap patch.
local_irq_save does not inc local_irq_count, unlike local_bh_disable.
Oops.
> do_softirq can be re-entered but on re-entry it will return immediatly
"immediately" leaves a narrow window. Sure, it'd be really hard to
hit, but it's still there.
Rusty.
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