p4d_populate_safe
static inline void p4d_populate_safe(struct mm_struct *mm, p4d_t *p4d,
static inline void p4d_populate_safe(struct mm_struct *mm, p4d_t *p4d, pud_t *pud)
#define p4d_populate_safe(mm, p4d, pud) do { } while (0)