Messages in this thread |  | | | Date | Fri, 11 Jan 2008 09:23:59 +0100 | | From | Cornelia Huck <> | | Subject | Re: [PATCH 0/7] convert semaphore to mutex in struct class |
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On Fri, 11 Jan 2008 10:33:16 +0800, "Dave Young" <hidave.darkstar@gmail.com> wrote:
> > > +struct device *class_find_device(struct class *class, void *data, > > > + int (*match)(struct device *, void *)) > > > +{ > > > + struct device *dev; > > > + > > > + if (!class) > > > + return NULL; > > > + > > > + mutex_lock(&class->mutex); > > > + list_for_each_entry(dev, &class->devices, node) > > > + if (match(dev, data) && get_device(dev)) > > > > First get the reference and then drop it if the match function returns > > 0 to make this analogous to the other _find_device() functions? > > It's just like other _find_device() functions. Are these more get/put > really needed?
The other _find_device() functions operate on klists, which means that there is an implicit get while the element is handled. This function operates on a normal list, which means that getting/putting the reference looks a bit different if we want the same effect.
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