From: William Kucharski <william.kucharski@xxxxxxxxxx> __remove_mapping() assumes that pages can only be either base pages or HPAGE_PMD_SIZE. Ask the page what size it is. Signed-off-by: William Kucharski <william.kucharski@xxxxxxxxxx> Signed-off-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> --- mm/vmscan.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index a7f9f379e523..9f44868e640b 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -932,10 +932,7 @@ static int __remove_mapping(struct address_space *mapping, struct page *page, * Note that if SetPageDirty is always performed via set_page_dirty, * and thus under the i_pages lock, then this ordering is not required. */ - if (unlikely(PageTransHuge(page)) && PageSwapCache(page)) - refcount = 1 + HPAGE_PMD_NR; - else - refcount = 2; + refcount = 1 + compound_nr(page); if (!page_ref_freeze(page, refcount)) goto cannot_free; /* note: atomic_cmpxchg in page_ref_freeze provides the smp_rmb */ -- 2.23.0
