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-rw-r--r--kernel/memremap.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/kernel/memremap.c b/kernel/memremap.c
index b981a7b023f0..778191e3e887 100644
--- a/kernel/memremap.c
+++ b/kernel/memremap.c
@@ -351,8 +351,13 @@ void *devm_memremap_pages(struct device *dev, struct resource *res,
for_each_device_pfn(pfn, page_map) {
struct page *page = pfn_to_page(pfn);
- /* ZONE_DEVICE pages must never appear on a slab lru */
- list_force_poison(&page->lru);
+ /*
+ * ZONE_DEVICE pages union ->lru with a ->pgmap back
+ * pointer. It is a bug if a ZONE_DEVICE page is ever
+ * freed or placed on a driver-private list. Seed the
+ * storage with LIST_POISON* values.
+ */
+ list_del(&page->lru);
page->pgmap = pgmap;
}
devres_add(dev, page_map);