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-rw-r--r--mm/migrate.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index de5c371a7969..e545ce7ddc17 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -464,7 +464,10 @@ void migrate_page_copy(struct page *newpage, struct page *page)
mlock_migrate_page(newpage, page);
ksm_migrate_page(newpage, page);
-
+ /*
+ * Please do not reorder this without considering how mm/ksm.c's
+ * get_ksm_page() depends upon ksm_migrate_page() and PageSwapCache().
+ */
ClearPageSwapCache(page);
ClearPagePrivate(page);
set_page_private(page, 0);