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SubjectRe: [tip:x86/irq] x86: Always use irq stacks
Turns out this wasn't a regression introduced by a commit, but it
happens when CONFIG_FUNCTION_GRAPH_TRACER is enabled. From a quick
look I have no idea why these would interact badly, especially as
CONFIG_FUNCTION_GRAPH_TRACER works fine with irq stacks if the
CONFIG_4KSTACKS options is set.



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