* it in @bitmap. The @offset must be aligned to an unsigned long and will be
* updated on return if different from what was requested; if the catmap is
* empty at the requested offset and beyond, the @offset is set to (u32)-1.
* it in @bitmap. The @offset must be aligned to an unsigned long and will be
* updated on return if different from what was requested; if the catmap is
* empty at the requested offset and beyond, the @offset is set to (u32)-1.