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mm/migration: use helper function vma_lookup() in add_page_for_migration
We could use helper function vma_lookup() to lookup the needed vma to simplify the code. Link: https://lkml.kernel.org/r/20220318111709.60311-6-linmiaohe@huawei.com Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Cc: Alistair Popple <apopple@nvidia.com> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: "Huang, Ying" <ying.huang@intel.com> Cc: Muchun Song <songmuchun@bytedance.com> Cc: Zi Yan <ziy@nvidia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
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@ -1604,8 +1604,8 @@ static int add_page_for_migration(struct mm_struct *mm, unsigned long addr,
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mmap_read_lock(mm);
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err = -EFAULT;
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vma = find_vma(mm, addr);
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if (!vma || addr < vma->vm_start || !vma_migratable(vma))
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vma = vma_lookup(mm, addr);
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if (!vma || !vma_migratable(vma))
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goto out;
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/* FOLL_DUMP to ignore special (like zero) pages */
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