On Wed, Jan 18, 2006 at 12:27:45PM +0530, Mukund JB. wrote:
>
> Dear All,
>
> I have gone through kref and am planning to implement then in my usb driver.
What kind of usb driver?
> please terminate my misconceptions if any by correcting the statements below.
>
> In the call below:
> kref_init(&dev->kref);
> sets the refcount in the kref to 1.
Yes.
> kref_put(&dev->kref);
> increment the refcount.
Hm, don't you mean "kref_get()" here? If so, yes, that is correct.
> kref_put(&dev->kref, mem_release );
> What I understand is when the refcount falls back to '1', only then
> the mem_release() function will be called.
No, when it falls to 0 it will be called.
> Is it correct? I mean, when is the mem_release () called i.e. when the
> refcount is '0' or '1'.
0. There's an OLS paper from a few years ago that describes kref in
detail, as well as the in-kernel documentation of it (see the file
Documentation/kref.txt). Did you read that?
thanks,
greg k-h
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