From 57dea93ac42d341e1fe902528b348ef6763fa485 Mon Sep 17 00:00:00 2001 From: Steve Capper Date: Wed, 10 Aug 2016 16:27:55 -0700 Subject: [PATCH] rmap: fix compound check logic in page_remove_file_rmap In page_remove_file_rmap(.) we have the following check: VM_BUG_ON_PAGE(compound && !PageTransHuge(page), page); This is meant to check for either HugeTLB pages or THP when a compound page is passed in. Unfortunately, if one disables CONFIG_TRANSPARENT_HUGEPAGE, then PageTransHuge(.) will always return false, provoking BUGs when one runs the libhugetlbfs test suite. This patch replaces PageTransHuge(), with PageHead() which will work for both HugeTLB and THP. Fixes: dd78fedde4b9 ("rmap: support file thp") Link: http://lkml.kernel.org/r/1470838217-5889-1-git-send-email-steve.capper@arm.com Signed-off-by: Steve Capper Acked-by: Kirill A. Shutemov Cc: Huang Shijie Cc: Will Deacon Cc: Catalin Marinas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/rmap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/mm/rmap.c b/mm/rmap.c index d4f56060ba3f..1ef36404e7b2 100644 --- a/mm/rmap.c +++ b/mm/rmap.c @@ -1304,7 +1304,7 @@ static void page_remove_file_rmap(struct page *page, bool compound) { int i, nr = 1; - VM_BUG_ON_PAGE(compound && !PageTransHuge(page), page); + VM_BUG_ON_PAGE(compound && !PageHead(page), page); lock_page_memcg(page); /* Hugepages are not counted in NR_FILE_MAPPED for now. */ -- 2.39.5