From ab130f9108dcf2062a44f9f0706824ef2e30492e Mon Sep 17 00:00:00 2001 From: "Matthew Wilcox (Oracle)" Date: Thu, 15 Oct 2020 20:10:15 -0700 Subject: mm: rename page_order() to buddy_order() The current page_order() can only be called on pages in the buddy allocator. For compound pages, you have to use compound_order(). This is confusing and led to a bug, so rename page_order() to buddy_order(). Signed-off-by: Matthew Wilcox (Oracle) Signed-off-by: Andrew Morton Link: https://lkml.kernel.org/r/20201001152259.14932-2-willy@infradead.org Signed-off-by: Linus Torvalds --- mm/page_isolation.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'mm/page_isolation.c') diff --git a/mm/page_isolation.c b/mm/page_isolation.c index 83692b937784..abbf42214485 100644 --- a/mm/page_isolation.c +++ b/mm/page_isolation.c @@ -88,7 +88,7 @@ static void unset_migratetype_isolate(struct page *page, unsigned migratetype) * these pages to be merged. */ if (PageBuddy(page)) { - order = page_order(page); + order = buddy_order(page); if (order >= pageblock_order) { pfn = page_to_pfn(page); buddy_pfn = __find_buddy_pfn(pfn, order); @@ -261,7 +261,7 @@ __test_page_isolated_in_pageblock(unsigned long pfn, unsigned long end_pfn, * the correct MIGRATE_ISOLATE freelist. There is no * simple way to verify that as VM_BUG_ON(), though. */ - pfn += 1 << page_order(page); + pfn += 1 << buddy_order(page); else if ((flags & MEMORY_OFFLINE) && PageHWPoison(page)) /* A HWPoisoned page cannot be also PageBuddy */ pfn++; -- cgit v1.2.3