> The generic_handle_domain_irq() function calls irq_resolve_mapping() > so calling irq_find_mapping() is duplicative and will lead to a stack > trace and an RCU stall. Can a wording approach (like the following) be a bit nicer? The generic_handle_domain_irq() function calls irq_resolve_mapping(). Thus delete a duplicative irq_find_mapping() call so that a stack trace and an RCU stall will be avoided. Regards, Markus