x86-urgent-2020-12-13

  - Correct a few problems in the x86 and the generic membarrier
    implementation. Small corrections for assumptions about visibility
    which have turned out not to be true.

  - Make the PAT bits for memory encryption correct vs. 4K and 2M/1G page
    table entries as they are at a different location.

  - Fix a concurrency issue in the the local bandwidth readout of resource
    control leading to incorrect values

  - Fix the ordering of allocating a vector for an interrupt. The order
    missed to respect the provided cpumask when the first attempt of
    allocating node local in the mask fails. It then tries the node instead
    of trying the full provided mask first. This leads to erroneous error
    messages and breaking the (user) supplied affinity request. Reorder it.

  - Make the INT3 padding detection in optprobe work correctly.