uintptr mmukunmap(uintptr, uintptr, usize);
extern void* mmuuncache(void*, usize);
extern void* ucalloc(usize);
-extern void* ucallocalign(usize size, int align, int span);
+extern void* ucallocalign(usize size, int align, usize span);
extern Block* ucallocb(int);
extern void ucfree(void*);
extern void ucfreeb(Block*);