Messages in this thread | | | Date | Sun, 06 Jul 2003 12:54:32 -0400 | From | Jeff Garzik <> | Subject | Re: kobjects, sysfs and the driver model make my head hurt |
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Greg KH wrote: >>(a) kobj = kobject_get(kobj); > > > This is the way to call kobject_get(), as the object we get after the > function returns is the one we can then safely use. [...] > Think of it as, "now we can use this kobject, not the one before calling > kobject_get()".
Doesn't matter. There is still absolutely no reason for the additional pointer storage. I agree with with you "Thinks of it as", but also add my own: think of it as a spinlock function. It doesn't return any value, but you can't touch the locked object(s) before you call the function.
The alloc functions return pointers. The _get functions never need to, because logically there should always we at least one ref when we are calling _get. (unless we want _get to notice an OBJ_FREEING flag and fail, that is...)
Jeff
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