linux-kernel - [PATCH v2 05/11] mm/migration: use helper function vma_lookup() in add_page_for

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Message-ID: <20220318111709.60311-6-linmiaohe@huawei.com>
Date:   Fri, 18 Mar 2022 19:17:03 +0800
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <ziy@...dia.com>, <baolin.wang@...ux.alibaba.com>,
        <ying.huang@...el.com>, <songmuchun@...edance.com>,
        <apopple@...dia.com>, <linux-mm@...ck.org>,
        <linux-kernel@...r.kernel.org>, <linmiaohe@...wei.com>
Subject: [PATCH v2 05/11] mm/migration: use helper function vma_lookup() in add_page_for_migration

We could use helper function vma_lookup() to lookup the needed vma to
simplify the code.

Signed-off-by: Miaohe Lin <linmiaohe@...wei.com>
---
 mm/migrate.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index b16c561a9a4b..eb1c736750da 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1614,8 +1614,8 @@ static int add_page_for_migration(struct mm_struct *mm, unsigned long addr,
 
 	mmap_read_lock(mm);
 	err = -EFAULT;
-	vma = find_vma(mm, addr);
-	if (!vma || addr < vma->vm_start || !vma_migratable(vma))
+	vma = vma_lookup(mm, addr);
+	if (!vma || !vma_migratable(vma))
 		goto out;
 
 	/* FOLL_DUMP to ignore special (like zero) pages */
-- 
2.23.0