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    SubjectRe: [v3 21/26] x86, irq: Define a global vector for VT-d Posted-Interrupts
    On 12/12/2014 07:14 AM, Feng Wu wrote:
    > Currently, we use a global vector as the Posted-Interrupts
    > Notification Event for all the vCPUs in the system. We need
    > to introduce another global vector for VT-d Posted-Interrtups,
    > which will be used to wakeup the sleep vCPU when an external
    > interrupt from a direct-assigned device happens for that vCPU.
    >
    > Signed-off-by: Feng Wu <feng.wu@intel.com>
    >

    > #ifdef CONFIG_HAVE_KVM
    > +void (*wakeup_handler_callback)(void) = NULL;
    > +EXPORT_SYMBOL_GPL(wakeup_handler_callback);
    > +

    Stylistic nitpick: we generally don't explicitly initialize
    global/static pointer variables to NULL (that happens automatically anyway.)

    Other than that,

    Acked-by: H. Peter Anvin <hpa@linux.intel.com>



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