linux-kernel - [PATCH 1/3] khugepaged: use helper function range_in_vma() in collapse_pte_mapped

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Date:   Thu, 25 Mar 2021 09:56:45 -0400
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH 1/3] khugepaged: use helper function range_in_vma() in collapse_pte_mapped_thp()

We could use helper function range_in_vma() to check whether the desired
range is inside the vma to simplify the code.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 mm/khugepaged.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/khugepaged.c b/mm/khugepaged.c
index b81521dfbb1a..ad0444f3f487 100644
--- a/mm/khugepaged.c
+++ b/mm/khugepaged.c
@@ -1446,7 +1446,7 @@ void collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr)
 	int i;
 
 	if (!vma || !vma->vm_file ||
-	    vma->vm_start > haddr || vma->vm_end < haddr + HPAGE_PMD_SIZE)
+	    !range_in_vma(vma, haddr, haddr + HPAGE_PMD_SIZE))
 		return;
 
 	/*
-- 
2.19.1