This commit changes various functions that change pages and

pageblocks migrate type between MIGRATE_ISOLATE and
MIGRATE_MOVABLE in such a way as to allow to work with
MIGRATE_CMA migrate type.

Signed-off-by: Michal Nazarewicz <m.nazarewicz@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
CC: Michal Nazarewicz <mina86@xxxxxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>

1 files changed, 27 insertions, 13 deletions

diff --git a/include/linux/page-isolation.h b/include/linux/page-isolation.h
index 856d9cfac294..b2a81fd1004a 100644
--- a/include/linux/page-isolation.h
+++ b/include/linux/page-isolation.h
@@ -3,39 +3,53 @@
 
 /*
  * Changes migrate type in [start_pfn, end_pfn) to be MIGRATE_ISOLATE.
- * If specified range includes migrate types other than MOVABLE,
+ * 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.
  */
-extern int
-start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn);
+int __start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
+			       unsigned migratetype);
+
+static inline int
+start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn)
+{
+	return __start_isolate_page_range(start_pfn, end_pfn, MIGRATE_MOVABLE);
+}
+
+int __undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
+			      unsigned migratetype);
 
 /*
  * Changes MIGRATE_ISOLATE to MIGRATE_MOVABLE.
  * target range is [start_pfn, end_pfn)
  */
-extern int
-undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn);
+static inline int
+undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn)
+{
+	return __undo_isolate_page_range(start_pfn, end_pfn, MIGRATE_MOVABLE);
+}
 
 /*
- * test all pages in [start_pfn, end_pfn)are isolated or not.
+ * Test all pages in [start_pfn, end_pfn) are isolated or not.
  */
-extern int
-test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn);
+int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn);
 
 /*
- * Internal funcs.Changes pageblock's migrate type.
- * Please use make_pagetype_isolated()/make_pagetype_movable().
+ * Internal functions. Changes pageblock's migrate type.
  */
-extern int set_migratetype_isolate(struct page *page);
-extern void unset_migratetype_isolate(struct page *page);
+int set_migratetype_isolate(struct page *page);
+void __unset_migratetype_isolate(struct page *page, unsigned migratetype);
+static inline void unset_migratetype_isolate(struct page *page)
+{
+	__unset_migratetype_isolate(page, MIGRATE_MOVABLE);
+}
 extern unsigned long alloc_contig_freed_pages(unsigned long start,
 					      unsigned long end, gfp_t flag);
 extern int alloc_contig_range(unsigned long start, unsigned long end,
-			      gfp_t flags);
+			      gfp_t flags, unsigned migratetype);
 extern void free_contig_pages(struct page *page, int nr_pages);
 
 /*