-#define for_each_element(element, _data, _datalen) \
- for (element = (void *)(_data); \
- (u8 *)(_data) + (_datalen) - (u8 *)element >= \
- sizeof(*element) && \
- (u8 *)(_data) + (_datalen) - (u8 *)element >= \
- sizeof(*element) + element->datalen; \
- element = (void *)(element->data + element->datalen))
+#define for_each_element(_elem, _data, _datalen) \
+ for (_elem = (const struct element *)(_data); \
+ (const u8 *)(_data) + (_datalen) - (const u8 *)_elem >= \
+ (int)sizeof(*_elem) && \
+ (const u8 *)(_data) + (_datalen) - (const u8 *)_elem >= \
+ (int)sizeof(*_elem) + _elem->datalen; \
+ _elem = (const struct element *)(_elem->data + _elem->datalen))