search for: 4bbd8d732e53

...113,6 +116,7 @@ struct dev_pagemap { enum memory_type type; unsigned int flags; const struct dev_pagemap_ops *ops; + void *owner; }; static inline struct vmem_altmap *pgmap_altmap(struct dev_pagemap *pgmap) diff --git a/include/linux/migrate.h b/include/linux/migrate.h index 72120061b7d4..4bbd8d732e53 100644 --- a/include/linux/migrate.h +++ b/include/linux/migrate.h @@ -196,6 +196,8 @@ struct migrate_vma { unsigned long npages; unsigned long start; unsigned long end; + + void *dev_private_owner; }; int migrate_vma_setup(struct migrate_vma *args); diff --git a/mm/migrate.c b/mm/mi...

When acting on device private mappings a driver needs to know if the device (or other entity in case of kvmppc) actually owns this private mapping. This series adds an owner field and converts the migrate_vma code over to check it. I looked into doing the same for hmm_range_fault, but as far as I can tell that code has never been wired up to actually work for device private memory, so instead of