Thread (43 messages) 43 messages, 7 authors, 2021-08-20
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[PATCH v6 06/13] include/linux/mm.h: helpers to check zone device generic type

From: Alex Sierra <hidden>
Date: 2021-08-13 06:32:21
Also in: amd-gfx, dri-devel, linux-ext4, linux-xfs
Subsystem: memory management - core, the rest · Maintainers: Andrew Morton, David Hildenbrand, Linus Torvalds

Two helpers added. One checks if zone device page is generic
type. The other if page is either private or generic type.

Signed-off-by: Alex Sierra <redacted>
---
 include/linux/mm.h | 8 ++++++++
 1 file changed, 8 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index d48a1f0889d1..c25cdb92038f 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1187,6 +1187,14 @@ static inline bool is_device_private_page(const struct page *page)
 		page->pgmap->type == MEMORY_DEVICE_PRIVATE;
 }
 
+static inline bool is_device_page(const struct page *page)
+{
+	return IS_ENABLED(CONFIG_DEV_PAGEMAP_OPS) &&
+		is_zone_device_page(page) &&
+		(page->pgmap->type == MEMORY_DEVICE_PRIVATE ||
+		 page->pgmap->type == MEMORY_DEVICE_GENERIC);
+}
+
 static inline bool is_pci_p2pdma_page(const struct page *page)
 {
 	return IS_ENABLED(CONFIG_DEV_PAGEMAP_OPS) &&
-- 
2.32.0

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