mm/page_isolation: remove migratetype from undo_isolate_page_range()

Since migratetype is no longer overwritten during pageblock isolation,
undoing pageblock isolation no longer needs which migratetype to restore.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Zi Yan <[email protected]>
Acked-by: David Hildenbrand <[email protected]>
Reviewed-by: Vlastimil Babka <[email protected]>
Cc: Baolin Wang <[email protected]>
Cc: Brendan Jackman <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Kirill A. Shuemov <[email protected]>
Cc: Mel Gorman <[email protected]>
Cc: Michal Hocko <[email protected]>
Cc: Oscar Salvador <[email protected]>
Cc: Richard Chang <[email protected]>
Cc: Suren Baghdasaryan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

1 files changed, 3 insertions, 6 deletions

diff --git a/mm/page_isolation.c b/mm/page_isolation.c
index 08f627a5032f..1edfef408faf 100644
--- a/mm/page_isolation.c
+++ b/mm/page_isolation.c
@@ -515,7 +515,7 @@ int start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
 		page = __first_valid_page(pfn, pageblock_nr_pages);
 		if (page && set_migratetype_isolate(page, migratetype, flags,
 					start_pfn, end_pfn)) {
-			undo_isolate_page_range(isolate_start, pfn, migratetype);
+			undo_isolate_page_range(isolate_start, pfn);
 			unset_migratetype_isolate(
 				pfn_to_page(isolate_end - pageblock_nr_pages));
 			return -EBUSY;
@@ -528,13 +528,10 @@ int start_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
  * undo_isolate_page_range - undo effects of start_isolate_page_range()
  * @start_pfn:		The first PFN of the isolated range
  * @end_pfn:		The last PFN of the isolated range
- * @migratetype:	New migrate type to set on the range
  *
- * This finds every MIGRATE_ISOLATE page block in the given range
- * and switches it to @migratetype.
+ * This finds and unsets every MIGRATE_ISOLATE page block in the given range
  */
-void undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn,
-			    int migratetype)
+void undo_isolate_page_range(unsigned long start_pfn, unsigned long end_pfn)
 {
 	unsigned long pfn;
 	struct page *page;