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mm, thp: use list_first_entry_or_null()
Simplify the code with list_first_entry_or_null(). Signed-off-by: Geliang Tang <geliangtang@163.com> Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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@ -176,13 +176,10 @@ pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp)
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/* FIFO */
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pgtable = pmd_huge_pte(mm, pmdp);
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if (list_empty(&pgtable->lru))
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pmd_huge_pte(mm, pmdp) = NULL;
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else {
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pmd_huge_pte(mm, pmdp) = list_entry(pgtable->lru.next,
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struct page, lru);
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pmd_huge_pte(mm, pmdp) = list_first_entry_or_null(&pgtable->lru,
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struct page, lru);
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if (pmd_huge_pte(mm, pmdp))
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list_del(&pgtable->lru);
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}
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return pgtable;
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}
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#endif
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