linux-kernel - [PATCH] mm/hugetlb: use helper function range_in_vma() in page_table

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Date:   Thu, 4 Feb 2021 06:29:49 -0500
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>, <mike.kravetz@...cle.com>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH] mm/hugetlb: use helper function range_in_vma() in page_table_shareable()

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

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

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index cf82629319ed..442705be052a 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -5237,7 +5237,7 @@ static unsigned long page_table_shareable(struct vm_area_struct *svma,
 	 */
 	if (pmd_index(addr) != pmd_index(saddr) ||
 	    vm_flags != svm_flags ||
-	    sbase < svma->vm_start || svma->vm_end < s_end)
+	    !range_in_vma(svma, sbase, s_end))
 		return 0;
 
 	return saddr;
-- 
2.19.1