Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > > Implement functions that increment or decrement a refcount_t object and > > return the value. The dec-and-ret function can be used to maintain a > > counter in a cache where 1 means the object is unused, but available and > > the garbage collector can use refcount_dec_if_one() to make the object > > unavailable. Further, both functions can be used to accurately trace the > > refcount (refcount_inc() followed by refcount_read() can't be considered > > accurate). > > Please just use a different interface for that instead of overloading > refcount_t. The main use case of that type is that it is so simple that > it is hard to get wrong (and have additional checking if things go > wrong) Which bit are you objecting to? Wanting to use a refcount_t with 1 to represent an otherwise-unreferenced object sat in a cache? Or wanting to display accurate usage counts when tracing gets and puts of objects? David
