linux-kernel - [PATCH v2 6/6] mm/huge_memory.c: use helper function migration_entry_to

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Date:   Tue, 16 Mar 2021 08:40:07 -0400
From:   Miaohe Lin <linmiaohe@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <ziy@...dia.com>, <willy@...radead.org>,
        <william.kucharski@...cle.com>, <vbabka@...e.cz>,
        <peterx@...hat.com>, <yulei.kernel@...il.com>, <walken@...gle.com>,
        <aneesh.kumar@...ux.ibm.com>, <rcampbell@...dia.com>,
        <thomas_os@...pmail.org>, <yang.shi@...ux.alibaba.com>,
        <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
        <linmiaohe@...wei.com>
Subject: [PATCH v2 6/6] mm/huge_memory.c: use helper function migration_entry_to_page()

It's more recommended to use helper function migration_entry_to_page() to
get the page via migration entry. We can also enjoy the PageLocked()
check there.

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

diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index ebfb0bf2e3fd..2c68123dc525 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1693,7 +1693,7 @@ int zap_huge_pmd(struct mmu_gather *tlb, struct vm_area_struct *vma,
 
 			VM_BUG_ON(!is_pmd_migration_entry(orig_pmd));
 			entry = pmd_to_swp_entry(orig_pmd);
-			page = pfn_to_page(swp_offset(entry));
+			page = migration_entry_to_page(entry);
 			flush_needed = 0;
 		} else
 			WARN_ONCE(1, "Non present huge pmd without pmd migration enabled!");
@@ -2101,7 +2101,7 @@ static void __split_huge_pmd_locked(struct vm_area_struct *vma, pmd_t *pmd,
 		swp_entry_t entry;
 
 		entry = pmd_to_swp_entry(old_pmd);
-		page = pfn_to_page(swp_offset(entry));
+		page = migration_entry_to_page(entry);
 		write = is_write_migration_entry(entry);
 		young = false;
 		soft_dirty = pmd_swp_soft_dirty(old_pmd);
-- 
2.19.1