linux-kernel - [PATCH] mm/hugetlb: Use huge_pte_lock instead of opencoding the lock

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Message-Id: <20161018090234.22574-1-aneesh.kumar@linux.vnet.ibm.com>
Date:   Tue, 18 Oct 2016 14:32:34 +0530
From:   "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:     akpm@...ux-foundation.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Subject: [PATCH] mm/hugetlb: Use huge_pte_lock instead of opencoding the lock

No functional change by this patch.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
---
 mm/hugetlb.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index da8fbd02b92e..2ff57dfb772d 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -3648,8 +3648,7 @@ static int hugetlb_no_page(struct mm_struct *mm, struct vm_area_struct *vma,
 		vma_end_reservation(h, vma, address);
 	}
 
-	ptl = huge_pte_lockptr(h, mm, ptep);
-	spin_lock(ptl);
+	ptl = huge_pte_lock(h, mm, ptep);
 	size = i_size_read(mapping->host) >> huge_page_shift(h);
 	if (idx >= size)
 		goto backout;
@@ -4266,8 +4265,7 @@ pte_t *huge_pmd_share(struct mm_struct *mm, unsigned long addr, pud_t *pud)
 	if (!spte)
 		goto out;
 
-	ptl = huge_pte_lockptr(hstate_vma(vma), mm, spte);
-	spin_lock(ptl);
+	ptl = huge_pte_lock(hstate_vma(vma), mm, spte);
 	if (pud_none(*pud)) {
 		pud_populate(mm, pud,
 				(pmd_t *)((unsigned long)spte & PAGE_MASK));
-- 
2.10.1