mm: further cleanup page_add_new_anon_rmap

Moving lru_cache_add_active_or_unevictable() into page_add_new_anon_rmap()
was good but stupid: we can and should SetPageSwapBacked() there too; and
we know for sure that this anonymous, swap-backed page is not file cache.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Lee Schermerhorn <lee.schermerhorn@hp.com>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 3 deletions

diff --git a/mm/memory.c b/mm/memory.c
index a138c50dc39a..122d965e820f 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -1948,7 +1948,6 @@ gotten:
                  * thread doing COW.
                  */
                 ptep_clear_flush_notify(vma, address, page_table);
-                SetPageSwapBacked(new_page);
                 page_add_new_anon_rmap(new_page, vma, address);
                 set_pte_at(mm, address, page_table, entry);
                 update_mmu_cache(vma, address, entry);
@@ -2444,7 +2443,6 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
         if (!pte_none(*page_table))
                 goto release;
         inc_mm_counter(mm, anon_rss);
-        SetPageSwapBacked(page);
         page_add_new_anon_rmap(page, vma, address);
         set_pte_at(mm, address, page_table, entry);
 
@@ -2592,7 +2590,6 @@ static int __do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
                         entry = maybe_mkwrite(pte_mkdirty(entry), vma);
                 if (anon) {
                         inc_mm_counter(mm, anon_rss);
-                        SetPageSwapBacked(page);
                         page_add_new_anon_rmap(page, vma, address);
                 } else {
                         inc_mm_counter(mm, file_rss);