mm: migration: cleanup migrate_pages API by matching types for offlining and sync

With the introduction of the boolean sync parameter, the API looks a
little inconsistent as offlining is still an int.  Convert offlining to a
bool for the sake of being tidy.

Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/mempolicy.c

@@ -935,7 +935,8 @@ static int migrate_to_node(struct mm_struct *mm, int source, int dest,
 		return PTR_ERR(vma);
 
 	if (!list_empty(&pagelist)) {
-		err = migrate_pages(&pagelist, new_node_page, dest, 0, true);
+		err = migrate_pages(&pagelist, new_node_page, dest,
+								false, true);
 		if (err)
 			putback_lru_pages(&pagelist);
 	}
@@ -1155,7 +1156,8 @@ static long do_mbind(unsigned long start, unsigned long len,
 
 		if (!list_empty(&pagelist)) {
 			nr_failed = migrate_pages(&pagelist, new_vma_page,
-						(unsigned long)vma, 0, true);
+						(unsigned long)vma,
+						false, true);
 			if (nr_failed)
 				putback_lru_pages(&pagelist);
 		}