[PATCH] mm: fix rss counter being incremented when unmapping

This patch fixes a bug introduced by the "mm counter operations through
macros" patch, which replaced a decrement operation in with an increment
macro in try_to_unmap_one().
Signed-off-by: NBjörn Steinbrink <B.Steinbrink@gmx.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

mm/rmap.c

@@ -586,7 +586,7 @@ static int try_to_unmap_one(struct page *page, struct vm_area_struct *vma)
 		dec_mm_counter(mm, anon_rss);
 	}
 
-	inc_mm_counter(mm, rss);
+	dec_mm_counter(mm, rss);
 	page_remove_rmap(page);
 	page_cache_release(page);