[PATCH] mm: Fix buddy list helpers

[Dan Williams]

Tetsuo reports that free page statistics are not reporting correctly,
and Vlastimil noticed that "mm: Move buddy list manipulations into
helpers" botched one of its conversions of add_to_free_area(). Fix the
double-increment of ->nr_free.

Reported-by: Tetsuo Handa <penguin-ker...@i-love.sakura.ne.jp>
Reported-by: Vlastimil Babka <vba...@suse.cz>
Cc: Michal Hocko <mho...@suse.com>
Tested-by: Tetsuo Handa <penguin-ker...@i-love.sakura.ne.jp>
Signed-off-by: Dan Williams <dan.j.willi...@intel.com>
---
Hi Andrew,

Please fold this into
mm-move-buddy-list-manipulations-into-helpers.patch.

 mm/page_alloc.c |    1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 2a0969e3b0eb..da537fc39c54 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1851,7 +1851,6 @@ static inline void expand(struct zone *zone, struct page 
*page,
                        continue;
 
                add_to_free_area(&page[size], area, migratetype);
-               area->nr_free++;
                set_page_order(&page[size], high);
        }
 }