thp: split_huge_page_mm/vma

split_huge_page_pmd compat code.  Each one of those would need to be
expanded to hundred of lines of complex code without a fully reliable
split_huge_page_pmd design.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Acked-by: Rik van Riel <riel@redhat.com>
Acked-by: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/mm/mprotect.c b/mm/mprotect.c
index 4c5133873097..bd27db6b992b 100644
--- a/mm/mprotect.c
+++ b/mm/mprotect.c
@@ -88,6 +88,7 @@ static inline void change_pmd_range(struct mm_struct *mm, pud_t *pud,
         pmd = pmd_offset(pud, addr);
         do {
                 next = pmd_addr_end(addr, end);
+                split_huge_page_pmd(mm, pmd);
                 if (pmd_none_or_clear_bad(pmd))
                         continue;
                 change_pte_range(mm, pmd, addr, next, newprot, dirty_accountable);