1 files changed, 0 insertions, 24 deletions

diff --git a/mm/rmap.c b/mm/rmap.c
index 2c78f8cadc95..3d38edffda41 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -1126,7 +1126,6 @@ void page_add_file_rmap(struct page *page)
  */
 void page_remove_rmap(struct page *page)
 {
-        struct address_space *mapping = page_mapping(page);
         bool anon = PageAnon(page);
         bool locked;
         unsigned long flags;
@@ -1144,29 +1143,6 @@ void page_remove_rmap(struct page *page)
                 goto out;
 
         /*
-         * Now that the last pte has gone, s390 must transfer dirty
-         * flag from storage key to struct page.  We can usually skip
-         * this if the page is anon, so about to be freed; but perhaps
-         * not if it's in swapcache - there might be another pte slot
-         * containing the swap entry, but page not yet written to swap.
-         *
-         * And we can skip it on file pages, so long as the filesystem
-         * participates in dirty tracking (note that this is not only an
-         * optimization but also solves problems caused by dirty flag in
-         * storage key getting set by a write from inside kernel); but need to
-         * catch shm and tmpfs and ramfs pages which have been modified since
-         * creation by read fault.
-         *
-         * Note that mapping must be decided above, before decrementing
-         * mapcount (which luckily provides a barrier): once page is unmapped,
-         * it could be truncated and page->mapping reset to NULL at any moment.
-         * Note also that we are relying on page_mapping(page) to set mapping
-         * to &swapper_space when PageSwapCache(page).
-         */
-        if (mapping && !mapping_cap_account_dirty(mapping) &&
-            page_test_and_clear_dirty(page_to_pfn(page), 1))
-                set_page_dirty(page);
-        /*
          * Hugepages are not counted in NR_ANON_PAGES nor NR_FILE_MAPPED
          * and not charged by memcg for now.
          */