From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 include/linux/page-isolation.h | 76 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 include/linux/page-isolation.h

(limited to 'include/linux/page-isolation.h')

diff --git a/include/linux/page-isolation.h b/include/linux/page-isolation.h
new file mode 100644
index 000000000..2dc1e1697
--- /dev/null
+++ b/include/linux/page-isolation.h
@@ -0,0 +1,76 @@
+#ifndef __LINUX_PAGEISOLATION_H
+#define __LINUX_PAGEISOLATION_H
+
+#ifdef CONFIG_MEMORY_ISOLATION
+static inline bool has_isolate_pageblock(struct zone *zone)
+{
+	return zone->nr_isolate_pageblock;
+}
+static inline bool is_migrate_isolate_page(struct page *page)
+{
+	return get_pageblock_migratetype(page) == MIGRATE_ISOLATE;
+}
+static inline bool is_migrate_isolate(int migratetype)
+{
+	return migratetype == MIGRATE_ISOLATE;
+}
+#else
+static inline bool has_isolate_pageblock(struct zone *zone)
+{
+	return false;
+}
+static inline bool is_migrate_isolate_page(struct page *page)
+{
+	return false;
+}
+static inline bool is_migrate_isolate(int migratetype)
+{
+	return false;
+}
+#endif
+
+bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
+			 bool skip_hwpoisoned_pages);
+void set_pageblock_migratetype(struct page *page, int migratetype);
+int move_freepages_block(struct zone *zone, struct page *page,
+				int migratetype);
+int move_freepages(struct zone *zone,
+			  struct page *start_page, struct page *end_page,
+			  int migratetype);
+
+/*
+ * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
+ * If specified range includes migrate types other than MOVABLE or CMA,
+ * this will fail with -EBUSY.
+ *
+ * For isolating all pages in the range finally, the caller have to
+ * free all pages in the range. test_page_isolated() can be used for
+ * test it.
+ */
+int
+start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
+			 unsigned migratetype, bool skip_hwpoisoned_pages);
+
+/*
+ * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
+ * target range is [start_pfn, end_pfn)
+ */
+int
+undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
+			unsigned migratetype);
+
+/*
+ * Test all pages in [start_pfn, end_pfn) are isolated or not.
+ */
+int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn,
+			bool skip_hwpoisoned_pages);
+
+/*
+ * Internal functions. Changes pageblock's migrate type.
+ */
+int set_migratetype_isolate(struct page *page, bool skip_hwpoisoned_pages);
+void unset_migratetype_isolate(struct page *page, unsigned migratetype);
+struct page *alloc_migrate_target(struct page *page, unsigned long private,
+				int **resultp);
+
+#endif
-- 
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