[PATCH] mm: zap_pte_range dec rss

Small adjustment: zap_pte_range decrement its rss counts from 0 then finally
add, avoiding negations - we don't have or need a sub_mm_rss.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/mm/memory.c b/mm/memory.c
index 7893eb4bb8c0..bc6296398f8b 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -609,13 +609,13 @@ static void zap_pte_range(struct mmu_gather *tlb,
                                 set_pte_at(mm, addr, pte,
                                            pgoff_to_pte(page->index));
                         if (PageAnon(page))
-                                anon_rss++;
+                                anon_rss--;
                         else {
                                 if (pte_dirty(ptent))
                                         set_page_dirty(page);
                                 if (pte_young(ptent))
                                         mark_page_accessed(page);
-                                file_rss++;
+                                file_rss--;
                         }
                         page_remove_rmap(page);
                         tlb_remove_page(tlb, page);
@@ -632,7 +632,7 @@ static void zap_pte_range(struct mmu_gather *tlb,
                 pte_clear_full(mm, addr, pte, tlb->fullmm);
         } while (pte++, addr += PAGE_SIZE, addr != end);
 
-        add_mm_rss(mm, -file_rss, -anon_rss);
+        add_mm_rss(mm, file_rss, anon_rss);
         pte_unmap(pte - 1);
 }