1 files changed, 76 insertions, 0 deletions
diff --git a/include/linux/page_owner.h b/include/linux/page_owner.h
new file mode 100644
index 000000000..119a0c9d2
--- /dev/null
+++ b/include/linux/page_owner.h
@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __LINUX_PAGE_OWNER_H
+#define __LINUX_PAGE_OWNER_H
+
+#include <linux/jump_label.h>
+
+#ifdef CONFIG_PAGE_OWNER
+extern struct static_key_false page_owner_inited;
+extern struct page_ext_operations page_owner_ops;
+
+extern void __reset_page_owner(struct page *page, unsigned short order);
+extern void __set_page_owner(struct page *page,
+			unsigned short order, gfp_t gfp_mask);
+extern void __split_page_owner(struct page *page, unsigned int nr);
+extern void __folio_copy_owner(struct folio *newfolio, struct folio *old);
+extern void __set_page_owner_migrate_reason(struct page *page, int reason);
+extern void __dump_page_owner(const struct page *page);
+extern void pagetypeinfo_showmixedcount_print(struct seq_file *m,
+					pg_data_t *pgdat, struct zone *zone);
+
+static inline void reset_page_owner(struct page *page, unsigned short order)
+{
+	if (static_branch_unlikely(&page_owner_inited))
+		__reset_page_owner(page, order);
+}
+
+static inline void set_page_owner(struct page *page,
+			unsigned short order, gfp_t gfp_mask)
+{
+	if (static_branch_unlikely(&page_owner_inited))
+		__set_page_owner(page, order, gfp_mask);
+}
+
+static inline void split_page_owner(struct page *page, unsigned int nr)
+{
+	if (static_branch_unlikely(&page_owner_inited))
+		__split_page_owner(page, nr);
+}
+static inline void folio_copy_owner(struct folio *newfolio, struct folio *old)
+{
+	if (static_branch_unlikely(&page_owner_inited))
+		__folio_copy_owner(newfolio, old);
+}
+static inline void set_page_owner_migrate_reason(struct page *page, int reason)
+{
+	if (static_branch_unlikely(&page_owner_inited))
+		__set_page_owner_migrate_reason(page, reason);
+}
+static inline void dump_page_owner(const struct page *page)
+{
+	if (static_branch_unlikely(&page_owner_inited))
+		__dump_page_owner(page);
+}
+#else
+static inline void reset_page_owner(struct page *page, unsigned short order)
+{
+}
+static inline void set_page_owner(struct page *page,
+			unsigned int order, gfp_t gfp_mask)
+{
+}
+static inline void split_page_owner(struct page *page,
+			unsigned short order)
+{
+}
+static inline void folio_copy_owner(struct folio *newfolio, struct folio *folio)
+{
+}
+static inline void set_page_owner_migrate_reason(struct page *page, int reason)
+{
+}
+static inline void dump_page_owner(const struct page *page)
+{
+}
+#endif /* CONFIG_PAGE_OWNER */
+#endif /* __LINUX_PAGE_OWNER_H */