__p4d
#define __p4d(x) ((p4d_t) { (x) } )
#define __p4d(x) ((p4d_t) { (x) })
#define __p4d(x) ((p4d_t) { (x) } )
static inline p4d_t __p4d(p4dval_t val)
#define __p4d(x) native_make_p4d(x)
#define __p4d(x) ((p4d_t) { __pgd(x) })