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    SubjectRe: [RFC] PCI device list locking
    Greg KH <greg@kroah.com> wrote:
    >
    > + spin_lock(&pci_bus_lock);
    >

    I have a vague feeling that some code somewhere may be calling these
    functions from interrupt context.

    I may have misremembered, but perhaps a sprinkling of
    WARN_ON(irqs_disabled()) would be prudent for now.

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