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    SubjectRe: [PATH -mm -v2] Fix a race condtion of oops_in_progress
    Huang Ying wrote:
    > Fix a race condition accessing oops_in_progress. Which may be changed on
    > multiple CPU simultaneously, but it is changed via non-atomic operation
    > ++/--. This patch changes the definition of oops_in_process from int to
    > atomic_t, and accessing method to atomic operations.

    You also need barriers. I believe rmb() before atomic_read() and wmb() after
    atomic_set() should suffice.

    -- Chris

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