Messages in this thread | | | Date | Thu, 9 Mar 2006 18:41:04 +1100 | From | Paul Mackerras <> | Subject | Re: [PATCH] Document Linux's memory barriers [try #2] |
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Jesse Barnes writes:
> Hm, a static checker should be able to find this stuff, shouldn't it?
Good idea. I wonder if sparse could be extended to do it.
Alternatively, it wouldn't be hard to check dynamically. Just have a per-cpu count of outstanding MMIO stores. Zero it in spin_lock and mmiowb, increment it in write*, and grizzle if spin_unlock finds it non-zero. Should be very little overhead.
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