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MIGRATE_VMA_SELECT_COMPOUND will be used to select THP pages during migrate_vma_setup() and MIGRATE_PFN_COMPOUND will make migrating device pages as compound pages during device pfn migration. Cc: Karol Herbst Cc: Lyude Paul Cc: Danilo Krummrich Cc: David Airlie Cc: Simona Vetter Cc: "J=C3=A9r=C3=B4me Glisse" Cc: Shuah Khan Cc: David Hildenbrand Cc: Barry Song Cc: Baolin Wang Cc: Ryan Roberts Cc: Matthew Wilcox Cc: Peter Xu Cc: Zi Yan Cc: Kefeng Wang Cc: Jane Chu Cc: Alistair Popple Cc: Donet Tom Signed-off-by: Balbir Singh --- include/linux/migrate.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/migrate.h b/include/linux/migrate.h index aaa2114498d6..1661e2d5479a 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -167,6 +167,7 @@ static inline int migrate_misplaced_folio(struct folio = *folio, int node) #define MIGRATE_PFN_VALID (1UL << 0) #define MIGRATE_PFN_MIGRATE (1UL << 1) #define MIGRATE_PFN_WRITE (1UL << 3) +#define MIGRATE_PFN_COMPOUND (1UL << 4) #define MIGRATE_PFN_SHIFT 6 =20 static inline struct page *migrate_pfn_to_page(unsigned long mpfn) @@ -185,6 +186,7 @@ enum migrate_vma_direction { MIGRATE_VMA_SELECT_SYSTEM =3D 1 << 0, MIGRATE_VMA_SELECT_DEVICE_PRIVATE =3D 1 << 1, MIGRATE_VMA_SELECT_DEVICE_COHERENT =3D 1 << 2, + MIGRATE_VMA_SELECT_COMPOUND =3D 1 << 3, }; =20 struct migrate_vma { --=20 2.49.0