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SubjectRe: [RFC PATCH 02/11] refcount: Implement inc/decrement-and-return functions
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Peter Zijlstra <peterz@infradead.org> wrote:

> > unsigned int refcount_dec_return(refcount_t *r);
> > unsigned int refcount_inc_return(refcount_t *r);
> >
>
> I'm not immediately seeing how wanting 1 to mean unused leads to
> requiring these two functions.

Did you read the other other part of the description?

Further, both functions can be used to accurately trace the refcount
(refcount_inc() followed by refcount_read() can't be considered
accurate).

> If you'll remember, I did that for inode_count and only needed
> dec_unless().

I don't remember. inode_count? I can't find such a thing - did you mean
i_count? I don't find anything matching "dec_unless.*i_count" either.

David

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