[PATCH 06/10] mm/hugetlb: remove redundant huge_pte_alloc() in hugetlb_fault()

Wei Yang
2020-08-07T09:13:34Z

Before proper processing, huge_pte_alloc() would be called
un-conditionally. It is not necessary to do this when ptep is NULL.

Signed-off-by: Wei Yang <richard.weiyang@linux.alibaba.com>
---
mm/hugetlb.c | 4 ----
1 file changed, 4 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index f5f04e89000d..fb09e5a83c39 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4534,10 +4534,6 @@ vm_fault_t hugetlb_fault(struct mm_struct *mm, struct vm_area_struct *vma,
} else if (unlikely(is_hugetlb_entry_hwpoisoned(entry)))
return VM_FAULT_HWPOISON_LARGE |
VM_FAULT_SET_HINDEX(hstate_index(h));
- } else {
- ptep = huge_pte_alloc(mm, haddr, huge_page_size(h));
- if (!ptep)
- return VM_FAULT_OOM;
}

/*
--
2.20.1 (Apple Git-117)