On Sat, 12 May 2007, Oleg Nesterov wrote:
>
> without task_lock() we can see "p->mm != NULL" but not PF_BORROWED_MM.
Let me explain it one more time:
- shouldn't the *caller* protect this?
Afaik, there's two situations:
- either things don't change (in which case you don't need locking at
all, since things are statically one way or the other)
- or things change (in which case the caller can't rely on the return
value anyway, since they might change *after* you release the lock)
ie what's up? Is there a third case?
Linus
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