Function xa_to_node

src/os/linux/pagecache.cpp:194–194

inline bool xa_is_internal(VAddr e) { return (e & 3ULL) == 2; }
inline bool xa_is_value(VAddr e)    { return (e & 1ULL) == 1; }
inline VAddr xa_to_node(VAddr e)    { return e & ~3ULL; }

struct Offsets {
    // super_block