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Subject[PATCH] mm, thp: use list_first_entry_or_null()
Date
Simplify the code with list_first_entry_or_null().

Signed-off-by: Geliang Tang <geliangtang@163.com>
---
mm/pgtable-generic.c | 9 +++------
1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c
index 69261d4..c311a2e 100644
--- a/mm/pgtable-generic.c
+++ b/mm/pgtable-generic.c
@@ -164,13 +164,10 @@ pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp)

/* FIFO */
pgtable = pmd_huge_pte(mm, pmdp);
- if (list_empty(&pgtable->lru))
- pmd_huge_pte(mm, pmdp) = NULL;
- else {
- pmd_huge_pte(mm, pmdp) = list_entry(pgtable->lru.next,
- struct page, lru);
+ pmd_huge_pte(mm, pmdp) = list_first_entry_or_null(&pgtable->lru,
+ struct page, lru);
+ if (pmd_huge_pte(mm, pmdp))
list_del(&pgtable->lru);
- }
return pgtable;
}
#endif
--
2.5.0



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