Messages in this thread | | | From | David Howells <> | Subject | Re: [RFC PATCH 02/11] refcount: Implement inc/decrement-and-return functions | Date | Fri, 01 Sep 2017 22:15:39 +0100 |
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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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