thp: rename split_huge_page_pmd() to split_huge_pmd()

We are going to decouple splitting THP PMD from splitting underlying
compound page.

This patch renames split_huge_page_pmd*() functions to split_huge_pmd*()
to reflect the fact that it doesn't imply page splitting, only PMD.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Sasha Levin <sasha.levin@oracle.com>
Tested-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Jerome Marchand <jmarchan@redhat.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Steve Capper <steve.capper@linaro.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 1 deletions

diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c
index 483231ebbb0b..e574b8546518 100644
--- a/arch/x86/kernel/vm86_32.c
+++ b/arch/x86/kernel/vm86_32.c
@@ -175,7 +175,11 @@ static void mark_screen_rdonly(struct mm_struct *mm)
         if (pud_none_or_clear_bad(pud))
                 goto out;
         pmd = pmd_offset(pud, 0xA0000);
-        split_huge_page_pmd_mm(mm, 0xA0000, pmd);
+
+        if (pmd_trans_huge(*pmd)) {
+                struct vm_area_struct *vma = find_vma(mm, 0xA0000);
+                split_huge_pmd(vma, pmd, 0xA0000);
+        }
         if (pmd_none_or_clear_bad(pmd))
                 goto out;
         pte = pte_offset_map_lock(mm, pmd, 0xA0000, &ptl);