From 75f83783bfdf2ddb3ffbf79ba44d506fb5b5548f Mon Sep 17 00:00:00 2001 From: Miaohe Lin Date: Tue, 4 May 2021 18:34:20 -0700 Subject: khugepaged: remove meaningless !pte_present() check in khugepaged_scan_pmd() We know it must meet the !is_swap_pte() and !pte_none() condition if we reach here. Since !is_swap_pte() indicates pte_none() or pte_present() is met, it's guaranteed that pte must be present here. Link: https://lkml.kernel.org/r/20210325135647.64106-4-linmiaohe@huawei.com Signed-off-by: Miaohe Lin Reviewed-by: Zi Yan Cc: Mike Kravetz Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/khugepaged.c | 4 ---- 1 file changed, 4 deletions(-) (limited to 'mm/khugepaged.c') diff --git a/mm/khugepaged.c b/mm/khugepaged.c index 276ac0099e19..a03569eda183 100644 --- a/mm/khugepaged.c +++ b/mm/khugepaged.c @@ -1271,10 +1271,6 @@ static int khugepaged_scan_pmd(struct mm_struct *mm, goto out_unmap; } } - if (!pte_present(pteval)) { - result = SCAN_PTE_NON_PRESENT; - goto out_unmap; - } if (pte_uffd_wp(pteval)) { /* * Don't collapse the page if any of the small -- cgit