On Tue, 21 Mar 2006, Kristen Accardi wrote:
> While most current uses of notifier_block use a global struct, I would
> like to be able to use it on a per device basis for drivers which have
> multiple device instances. I would also like to be able to have a
> private data struct associated with the notifier block so that per
> device data can be easily accessed. This patch will modify the
> notifier_block struct to add a void *, and will require no modifications
> to any other users of the notifier_block.
>
> Signed-off-by: Kristen Carlson Accardi <[email protected]>
>
> ---
> include/linux/notifier.h | 1 +
> 1 files changed, 1 insertion(+)
>
> --- 2.6-git-kca.orig/include/linux/notifier.h
> +++ 2.6-git-kca/include/linux/notifier.h
> @@ -15,6 +15,7 @@ struct notifier_block
> {
> int (*notifier_call)(struct notifier_block *self, unsigned long, void *);
> struct notifier_block *next;
> + void *data;
> int priority;
> };
I still think this isn't really needed. The same effect can be
accomplished by embedding a notifier_block struct within a larger
structure that also contains the data pointer.
On the other hand this isn't a terribly big change, so I don't actually
object to it.
Alan Stern
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