Displaying 2 results from an estimated 2 matches for "9b2c97ceb775".
2020 Mar 16
0
[PATCH 1/4] memremap: add an owner field to struct dev_pagemap
..._altmap altmap;
@@ -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/mm/memremap.c b/mm/memremap.c
index 09b5b7adc773..9b2c97ceb775 100644
--- a/mm/memremap.c
+++ b/mm/memremap.c
@@ -181,6 +181,10 @@ void *memremap_pages(struct dev_pagemap *pgmap, int nid)
WARN(1, "Missing migrate_to_ram method\n");
return ERR_PTR(-EINVAL);
}
+ if (!pgmap->owner) {
+ WARN(1, "Missing owner\n");
+ return ER...
2020 Mar 16
14
ensure device private pages have an owner v2
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