From d8c6546b1aea843fbeb4d54a1202f1adda6504be Mon Sep 17 00:00:00 2001
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: Mon, 23 Sep 2019 15:34:30 -0700
Subject: mm: introduce compound_nr()

Replace 1 << compound_order(page) with compound_nr(page).  Minor
improvements in readability.

Link: http://lkml.kernel.org/r/20190721104612.19120-4-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/page_alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'mm/page_alloc.c')

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index ff5484fdbdf9..df566c0f6729 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -8196,7 +8196,7 @@ bool has_unmovable_pages(struct zone *zone, struct page *page, int count,
 			if (!hugepage_migration_supported(page_hstate(head)))
 				goto unmovable;
 
-			skip_pages = (1 << compound_order(head)) - (page - head);
+			skip_pages = compound_nr(head) - (page - head);
 			iter += skip_pages - 1;
 			continue;
 		}
-- 
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