linux-kernel - [PATCH 4/5] mm/hugetlb: simplify the code when alloc_huge_page() failed in hugetlb_no

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Date:   Mon, 8 Mar 2021 06:28:08 -0500
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>, <mike.kravetz@...cle.com>
CC:     <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH 4/5] mm/hugetlb: simplify the code when alloc_huge_page() failed in hugetlb_no_page()

Rework the error handling code when alloc_huge_page() failed to remove some
duplicated code and simplify the code slightly.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 mm/hugetlb.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 695603071f2c..69b8de866a24 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -4337,13 +4337,10 @@ static vm_fault_t hugetlb_no_page(struct mm_struct *mm,
 			 * sure there really is no pte entry.
 			 */
 			ptl = huge_pte_lock(h, mm, ptep);
-			if (!huge_pte_none(huge_ptep_get(ptep))) {
-				ret = 0;
-				spin_unlock(ptl);
-				goto out;
-			}
+			ret = 0;
+			if (huge_pte_none(huge_ptep_get(ptep)))
+				ret = vmf_error(PTR_ERR(page));
 			spin_unlock(ptl);
-			ret = vmf_error(PTR_ERR(page));
 			goto out;
 		}
 		clear_huge_page(page, address, pages_per_huge_page(h));
-- 
2.19.1