On Saturday 14 March 2009, Mark Brown wrote:
> Looking at things from the point of view of the consumer I just don't
> find that it makes any difference since as far as the consumer is
> concerned it's all opaque objects manipulated via an API.
These put()/get() calls are not refcount calls. They're
what might be called alloc()/free() calls instead.
> foo = foo_get(dev, name);
The normal idiom is
bar = foo_get(foo)
which just increments a refcount. Then if "bar" were handed
to something else ("baz") right here, and "baz" needed to keep a
copy of that reference, it would be expected to grab its own
refcount via foo_get(bar), and later release via foo_put(bar).
> foo_enable(foo);
> foo_disable(foo);
> foo_put(foo);
Until "baz" called foo_put(bar), that reference would still be
usable. But ... regulator_put(foo) does a kfree, it's not
just updating refcounts.
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