@@ -1236,6 +1236,56 @@ static int __migrate_folio_unmap(struct folio *src, struct folio *dst, int force
return rc;
}
+/* Obtain the lock on page, remove all ptes. */
+static int migrate_folio_unmap(new_page_t get_new_page, free_page_t put_new_page,
+ unsigned long private, struct folio *src,
+ struct folio **dstp, int force, bool avoid_force_lock,
+ enum migrate_mode mode, enum migrate_reason reason,
+ struct list_head *ret)
+{
+ struct folio *dst;
+ int rc = MIGRATEPAGE_UNMAP;
+ struct page *newpage = NULL;
+
+ if (!thp_migration_supported() && folio_test_transhuge(src))
+ return -ENOSYS;
+
+ if (folio_ref_count(src) == 1) {
+ /* Folio was freed from under us. So we are done. */
+ folio_clear_active(src);
+ folio_clear_unevictable(src);
+ /* free_pages_prepare() will clear PG_isolated. */
+ list_del(&src->lru);
+ migrate_folio_done(src, reason);
+ return MIGRATEPAGE_SUCCESS;
+ }
+
+ newpage = get_new_page(&src->page, private);
+ if (!newpage)
+ return -ENOMEM;
+ dst = page_folio(newpage);
+ *dstp = dst;
+
+ dst->private = NULL;
+ rc = __migrate_folio_unmap(src, dst, force, avoid_force_lock, mode);
+ if (rc == MIGRATEPAGE_UNMAP)
+ return rc;
+
+ /*
+ * A folio that has not been unmapped will be restored to
+ * right list unless we want to retry.
+ */
+ if (rc != -EAGAIN && rc != -EDEADLOCK)
+ list_move_tail(&src->lru, ret);
+
+ if (put_new_page)
+ put_new_page(&dst->page, private);
+ else
+ folio_put(dst);
+
+ return rc;
+}
+
static int __migrate_folio_move(struct folio *src, struct folio *dst,
enum migrate_mode mode)
{
@@ -1296,56 +1346,6 @@ static int __migrate_folio_move(struct folio *src, struct folio *dst,
return rc;
}
-/* Obtain the lock on page, remove all ptes. */
-static int migrate_folio_unmap(new_page_t get_new_page, free_page_t put_new_page,
- unsigned long private, struct folio *src,
- struct folio **dstp, int force, bool avoid_force_lock,
- enum migrate_mode mode, enum migrate_reason reason,
- struct list_head *ret)
-{
- struct folio *dst;
- int rc = MIGRATEPAGE_UNMAP;
- struct page *newpage = NULL;
-
- if (!thp_migration_supported() && folio_test_transhuge(src))
- return -ENOSYS;
-
- if (folio_ref_count(src) == 1) {
- /* Folio was freed from under us. So we are done. */
- folio_clear_active(src);
- folio_clear_unevictable(src);
- /* free_pages_prepare() will clear PG_isolated. */
- list_del(&src->lru);
- migrate_folio_done(src, reason);
- return MIGRATEPAGE_SUCCESS;
- }
-
- newpage = get_new_page(&src->page, private);
- if (!newpage)
- return -ENOMEM;
- dst = page_folio(newpage);
- *dstp = dst;
-
- dst->private = NULL;
- rc = __migrate_folio_unmap(src, dst, force, avoid_force_lock, mode);
- if (rc == MIGRATEPAGE_UNMAP)
- return rc;
-
- /*
- * A folio that has not been unmapped will be restored to
- * right list unless we want to retry.
- */
- if (rc != -EAGAIN && rc != -EDEADLOCK)
- list_move_tail(&src->lru, ret);
-
- if (put_new_page)
- put_new_page(&dst->page, private);
- else
- folio_put(dst);
-
- return rc;
-}
-
/* Migrate the folio to the newly allocated folio in dst. */
static int migrate_folio_move(free_page_t put_new_page, unsigned long private,
struct folio *src, struct folio *dst,