From: Mika Penttilä <[email protected]>

HMM depends on MMU notifiers. With the unified HMM/migrate_device
page table walk migrate_device needs HMM enabled.
Enable them explicitly to avoid breaking random configs.

Cc: Andrew Morton <[email protected]>
Cc: David Hildenbrand <[email protected]>
Cc: Lorenzo Stoakes <[email protected]>
Cc: "Liam R. Howlett" <[email protected]>
Cc: Vlastimil Babka <[email protected]>
Cc: Mike Rapoport <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Cc: Michal Hocko <[email protected]>
Signed-off-by: Mika Penttilä <[email protected]>
Acked-by: David Hildenbrand (Arm) <[email protected]>
---
 mm/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/Kconfig b/mm/Kconfig
index e8bf1e9e6ad9..0d8db75ffc23 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -646,6 +646,7 @@ config MIGRATION
 
 config DEVICE_MIGRATION
        def_bool MIGRATION && ZONE_DEVICE
+       select HMM_MIRROR
 
 config ARCH_ENABLE_HUGEPAGE_MIGRATION
        bool
@@ -1221,6 +1222,7 @@ config ZONE_DEVICE
 config HMM_MIRROR
        bool
        depends on MMU
+       select MMU_NOTIFIER
 
 config GET_FREE_REGION
        bool
-- 
2.50.0

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