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wrote: > I agree with Matthew. Returning 0 here would work correctly even if > vma_mark_detached() starts using TASK_INTERRUPTIBLE and 0 becomes > possible. The comment also seems appropriate to me. See my reply to Matthew. There's a lot of implicit knowledge that you perhaps aren't aware you are assuming _everybody_ will just happen to be aware of. This is natural as the author-of-the-thing ;) I know I've missed things I've happened to assume in my own series before - wood-for-the-trees etc. The fact that 3 (or was it 4?) people missed this bug is a hint as to the subtlety here. Let's just make life easier for ourselves by spelling things out. Thanks, Lorenzo