search for: remove_pin_at_irq

...onsider it dubious for masked entries. In Linux, such behavior is benign since when the entry later is being used for some normal interrupt, the old setting is simply overwritten. In Xen, however, ioapic_guest_write() uses the vector field to determine the previous associated IRQ and possibly call remove_pin_at_irq() - this is where we got a report of a hypervisor crash - the BUG() in the first loop of this function triggers. Since I see two ways of fixing this (and perhaps there are more), before creating a patch I''d like to understand which of the approaches seems more reasonable (or whether both...