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>
diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c
index 7d3db02..4c681ba 100644
--- a/mm/pgtable-generic.c
+++ b/mm/pgtable-generic.c
@@ -176,13 +176,10 @@
/* 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