The patch titled
Subject: mm/migrate.c: fix potential indeterminate pte entry in migrate_vma_insert_page()
has been removed from the -mm tree. Its filename was
mm-migratec-fix-potential-indeterminate-pte-entry-in-migrate_vma_insert_page.patch
This patch was dropped because it was merged into mainline or a subsystem tree
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From: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Subject: mm/migrate.c: fix potential indeterminate pte entry in migrate_vma_insert_page()
If the zone device page does not belong to un-addressable device memory,
the variable entry will be uninitialized and lead to indeterminate pte
entry ultimately. Fix this unexpected case and warn about it.
Link: https://lkml.kernel.org/r/20210325131524.48181-4-linmiaohe@xxxxxxxxxx
Fixes: df6ad69838fc ("mm/device-public-memory: device memory cache coherent with CPU")
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Cc: Alistair Popple <apopple@xxxxxxxxxx>
Cc: Jerome Glisse <jglisse@xxxxxxxxxx>
Cc: Rafael Aquini <aquini@xxxxxxxxxx>
Cc: Yang Shi <shy828301@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/migrate.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/mm/migrate.c~mm-migratec-fix-potential-indeterminate-pte-entry-in-migrate_vma_insert_page
+++ a/mm/migrate.c
@@ -2947,6 +2947,13 @@ static void migrate_vma_insert_page(stru
swp_entry = make_device_private_entry(page, vma->vm_flags & VM_WRITE);
entry = swp_entry_to_pte(swp_entry);
+ } else {
+ /*
+ * For now we only support migrating to un-addressable
+ * device memory.
+ */
+ pr_warn_once("Unsupported ZONE_DEVICE page type.\n");
+ goto abort;
}
} else {
entry = mk_pte(page, vma->vm_page_prot);
_
Patches currently in -mm which might be from linmiaohe@xxxxxxxxxx are
