thp: add x86 32bit support

Add support for transparent hugepages to x86 32bit.

Share the same VM_ bitflag for VM_MAPPED_COPY.  mm/nommu.c will never
support transparent hugepages.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-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, 2 insertions, 2 deletions

diff --git a/arch/x86/mm/pgtable.c b/arch/x86/mm/pgtable.c
index 65e92d58f942..500242d3c96d 100644
--- a/arch/x86/mm/pgtable.c
+++ b/arch/x86/mm/pgtable.c
@@ -362,7 +362,7 @@ int pmdp_test_and_clear_young(struct vm_area_struct *vma,
 
         if (pmd_young(*pmdp))
                 ret = test_and_clear_bit(_PAGE_BIT_ACCESSED,
-                                         (unsigned long *) &pmdp->pmd);
+                                         (unsigned long *)pmdp);
 
         if (ret)
                 pmd_update(vma->vm_mm, addr, pmdp);
@@ -404,7 +404,7 @@ void pmdp_splitting_flush(struct vm_area_struct *vma,
         int set;
         VM_BUG_ON(address & ~HPAGE_PMD_MASK);
         set = !test_and_set_bit(_PAGE_BIT_SPLITTING,
-                                (unsigned long *)&pmdp->pmd);
+                                (unsigned long *)pmdp);
         if (set) {
                 pmd_update(vma->vm_mm, address, pmdp);
                 /* need tlb flush only to serialize against gup-fast */