diff mbox series

[v6,06/13] include/linux/mm.h: helpers to check zone device generic type

Message ID 20210813063150.2938-7-alex.sierra@amd.com (mailing list archive)
State New
Headers show
Series Support DEVICE_GENERIC memory in migrate_vma_* | expand

Commit Message

Sierra Guiza, Alejandro (Alex) Aug. 13, 2021, 6:31 a.m. UTC 
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 <alex.sierra@amd.com>
---
 include/linux/mm.h | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

Christoph Hellwig Aug. 15, 2021, 9:16 a.m. UTC | #1 
On Fri, Aug 13, 2021 at 01:31:43AM -0500, Alex Sierra wrote:
> 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 <alex.sierra@amd.com>

Looks good,

Reviewed-by: Christoph Hellwig <hch@lst.de>
diff mbox series

Patch

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) &&