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khugepaged: remove meaningless !pte_present() check in khugepaged_scan_pmd()

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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 <linmiaohe@huawei.com>
Reviewed-by: Zi Yan <ziy@nvidia.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Miaohe Lin 2021-05-04 18:34:20 -07:00 committed by Linus Torvalds
parent 18d24a7cd9
commit 75f83783bf
1 changed files with 0 additions and 4 deletions
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4
mm/khugepaged.c
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@ -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