Re: SMP problem with (en|dis)able_bh().
Alan Cox (alan@lxorguk.ukuu.org.uk)
Wed, 13 Jan 1999 16:09:39 +0000 (GMT)
> It is a scholar example of resource competition which requires mutual
> exclusion if the resources are to remain consistent. The problem is
> "hidden" in the fact that once the processor B decreases the count
> to zero and thus decides it is going to set the bit in the mask, it will
> do it, and nothing is going to prevent it, even if A would use
> disable_bh() gazillion times meanwhile...
Yes - I think you are right now I've looked harder at it
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