The patch titled
Subject: mm/swapops: make is_pmd_migration_entry more strict
has been added to the -mm tree. Its filename is
mm-swapops-make-is_pmd_migration_entry-more-strict.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-swapops-make-is_pmd_migration_entry-more-strict.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-swapops-make-is_pmd_migration_entry-more-strict.patch
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------------------------------------------------------
From: Hongchen Zhang <zhanghongchen@xxxxxxxxxxx>
Subject: mm/swapops: make is_pmd_migration_entry more strict
A pmd migration entry should first be a swap pmd,so use is_swap_pmd(pmd)
instead of !pmd_present(pmd).
On the other hand, some architecture (MIPS for example) may misjudge a
pmd_none entry as a pmd migration entry.
Link: https://lkml.kernel.org/r/1651131333-6386-1-git-send-email-zhanghongchen@xxxxxxxxxxx
Signed-off-by: Hongchen Zhang <zhanghongchen@xxxxxxxxxxx>
Acked-by: Peter Xu <peterx@xxxxxxxxxx>
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Ralph Campbell <rcampbell@xxxxxxxxxx>
Cc: Naoya Horiguchi <naoya.horiguchi@xxxxxxx>
Cc: Hugh Dickins <hughd@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/swapops.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/linux/swapops.h~mm-swapops-make-is_pmd_migration_entry-more-strict
+++ a/include/linux/swapops.h
@@ -424,7 +424,7 @@ static inline pmd_t swp_entry_to_pmd(swp
static inline int is_pmd_migration_entry(pmd_t pmd)
{
- return !pmd_present(pmd) && is_migration_entry(pmd_to_swp_entry(pmd));
+ return is_swap_pmd(pmd) && is_migration_entry(pmd_to_swp_entry(pmd));
}
#else
static inline int set_pmd_migration_entry(struct page_vma_mapped_walk *pvmw,
_
Patches currently in -mm which might be from zhanghongchen@xxxxxxxxxxx are
mm-swapops-make-is_pmd_migration_entry-more-strict.patch
