On Fri, Aug 06, 2010 at 01:02:24PM +0300, Ohad Ben-Cohen wrote:
> We have Russell's suggestion which is nice and simple, but it has the
> 1 device limitation.
You could make it generic by doing something like this:
#define set_device_data(name, type, index, data) \
({ \
extern void __set_device_data(const char *, int, void *, size_t); \
BUILD_BUG_ON(!__same_type(type, *data)); \
__set_device_data(name ":" #type, index, data, sizeof(type)); \
})
#define get_device_data(name, type, index) ({ \
extern void *__get_device_data(const char *, int); \
type *__ptr = __get_device_data(name ":" #type, index); \
__ptr; })
And now we have something that takes a string and index to use as a lookup
key in some kind of list - and it's typesafe (because the lookup key is
dependent on the stringified type.)
But... at this point I feel that we're getting too complicated, and will
get shouted at to use something like DT which already solves this problem.
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