Hello, > Several drivers need to dynamically calculate the size of an binary > attribute. Currently this is done by assigning attr->size from the > is_bin_visible() callback. > > This has drawbacks: > * It is not documented. > * A single attribute can be instantiated multiple times, overwriting the > shared size field. > * It prevents the structure to be moved to read-only memory. > > Introduce a new dedicated callback to calculate the size of the > attribute. Would it be possible to have a helper that when run against a specific kobject reference, then it would refresh or re-run the size callbacks? We have an use case where we resize BARs on demand via sysfs, and currently the only way to update the size of each resource sysfs object is to remove and added them again, which is a bit crude, and can also be unsafe. Hence the question. There exist the sysfs_update_groups(), but the BAR resource sysfs objects are currently, at least not yet, added to any attribute group. Thank you! Krzysztof
