int vm_insert_mixed(struct vm_area_struct *vma, unsigned long addr,
unsigned long pfn);
-struct page *follow_page(struct vm_area_struct *, unsigned long address,
- unsigned int foll_flags);
+struct page *follow_page_mask(struct vm_area_struct *vma,
+ unsigned long address, unsigned int foll_flags,
+ unsigned int *page_mask);
+
+static inline struct page *follow_page(struct vm_area_struct *vma,
+ unsigned long address, unsigned int foll_flags)
+{
+ unsigned int unused_page_mask;
+ return follow_page_mask(vma, address, foll_flags, &unused_page_mask);
+}
+
#define FOLL_WRITE 0x01 /* check pte is writable */
#define FOLL_TOUCH 0x02 /* mark page accessed */
#define FOLL_GET 0x04 /* do get_page on page */
#define FOLL_SPLIT 0x80 /* don't return transhuge pages, split them */
#define FOLL_HWPOISON 0x100 /* check page is hwpoisoned */
#define FOLL_NUMA 0x200 /* force NUMA hinting page fault */
+#define FOLL_MIGRATION 0x400 /* wait for page to replace migration entry */
typedef int (*pte_fn_t)(pte_t *pte, pgtable_t token, unsigned long addr,
void *data);