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SubjectRe: [PATCH 3/5] mm/hugetlb.c: Remove the unnecessary non_swap_entry()
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On 7/19/20 11:26 PM, Baoquan He wrote:
> The checking is_migration_entry() and is_hwpoison_entry() are stricter
> than non_swap_entry(), means they have covered the conditional check
> which non_swap_entry() is doing.
>
> Hence remove the unnecessary non_swap_entry() in is_hugetlb_entry_migration()
> and is_hugetlb_entry_hwpoisoned() to simplify code.
>
> Signed-off-by: Baoquan He <bhe@redhat.com>

Agreed, we can remove the checks for non_swap_entry.

Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
--
Mike Kravetz

> ---
> mm/hugetlb.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/mm/hugetlb.c b/mm/hugetlb.c
> index a58f976a9dd9..467894d8332a 100644
> --- a/mm/hugetlb.c
> +++ b/mm/hugetlb.c
> @@ -3748,7 +3748,7 @@ bool is_hugetlb_entry_migration(pte_t pte)
> if (huge_pte_none(pte) || pte_present(pte))
> return false;
> swp = pte_to_swp_entry(pte);
> - if (non_swap_entry(swp) && is_migration_entry(swp))
> + if (is_migration_entry(swp))
> return true;
> else
> return false;
> @@ -3761,7 +3761,7 @@ static bool is_hugetlb_entry_hwpoisoned(pte_t pte)
> if (huge_pte_none(pte) || pte_present(pte))
> return false;
> swp = pte_to_swp_entry(pte);
> - if (non_swap_entry(swp) && is_hwpoison_entry(swp))
> + if (is_hwpoison_entry(swp))
> return true;
> else
> return false;
>

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