[PATCH 5.10 19/86] mm/huge_memory.c: use helper function migration_entry_to_page()

Greg Kroah-Hartman
2022-08-29T11:07:04Z

From: Miaohe Lin <linmiaohe@huawei.com>

[ Upstream commit a44f89dc6c5f8ba70240b81a570260d29d04bcb0 ]

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.

Link: https://lkml.kernel.org/r/20210318122722.13135-7-linmiaohe@huawei.com
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Michel Lespinasse <walken@google.com>
Cc: Ralph Campbell <rcampbell@nvidia.com>
Cc: Thomas Hellstrm (Intel) <thomas_os@shipmail.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Cc: Yang Shi <yang.shi@linux.alibaba.com>
Cc: yuleixzhang <yulei.kernel@gmail.com>
Cc: Zi Yan <ziy@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
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 594368f6134f1..cb7b0aead7096 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1691,7 +1691,7 @@ 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!");
@@ -2110,7 +2110,7 @@ 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);
--
2.35.1