Re: [PATH -mm -v2] Fix a race condtion of oops_in_progress

[Chris Snook]

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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