[PATCH] mm: fix account pmd page to the process

[zhongjiang]

From: zhong jiang <zhongji...@huawei.com>

when a process acquire a pmd table shared by other process, we
increase the account to current process. otherwise, a race result
in other tasks have set the pud entry. so it no need to increase it.

Signed-off-by: zhong jiang <zhongji...@huawei.com>
---
 mm/hugetlb.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 19d0d08..3b025c5 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4189,10 +4189,9 @@ pte_t *huge_pmd_share(struct mm_struct *mm, unsigned 
long addr, pud_t *pud)
        if (pud_none(*pud)) {
                pud_populate(mm, pud,
                                (pmd_t *)((unsigned long)spte & PAGE_MASK));
-       } else {
+       } else 
                put_page(virt_to_page(spte));
-               mm_inc_nr_pmds(mm);
-       }
+
        spin_unlock(ptl);
 out:
        pte = (pte_t *)pmd_alloc(mm, pud, addr);
-- 
1.8.3.1