mm: place page->pmd_huge_pte to right union

I don't know what went wrong, mis-merge or something, but ->pmd_huge_pte
placed in wrong union within struct page.

In original patch[1] it's placed to union with ->lru and ->slab, but in
commit e009bb30c8df ("mm: implement split page table lock for PMD
level") it's in union with ->index and ->freelist.

That union seems also unused for pages with table tables and safe to
re-use, but it's not what I've tested.

Let's move it to original place.  It fixes indentation at least.  :)

[1] https://lkml.org/lkml/2013/10/7/288

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 3 insertions, 3 deletions

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 10f5a7272b80..011eb85d7b0f 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -65,9 +65,6 @@ struct page {
                                                  * this page is only used to
                                                  * free other pages.
                                                  */
-#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && USE_SPLIT_PMD_PTLOCKS
-                pgtable_t pmd_huge_pte; /* protected by page->ptl */
-#endif
                 };
 
                 union {
@@ -135,6 +132,9 @@ struct page {
 
                 struct list_head list;  /* slobs list of pages */
                 struct slab *slab_page; /* slab fields */
+#if defined(CONFIG_TRANSPARENT_HUGEPAGE) && USE_SPLIT_PMD_PTLOCKS
+                pgtable_t pmd_huge_pte; /* protected by page->ptl */
+#endif
         };
 
         /* Remainder is not double word aligned */