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-rw-r--r--include/linux/rmap.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index bd3504d11b15..1973649e8f93 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -206,6 +206,8 @@ void hugepage_add_new_anon_rmap(struct page *, struct vm_area_struct *,
static inline void __page_dup_rmap(struct page *page, bool compound)
{
+ if (!compound && PageCompound(page))
+ atomic_inc(subpages_mapcount_ptr(compound_head(page)));
atomic_inc(compound ? compound_mapcount_ptr(page) : &page->_mapcount);
}