Current PageAnon() is always return false for tail. We need to look on
head page for correct answer. Let's change the function to give the
right result.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
include/linux/mm.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 98c11c5be0ad..1825c468f158 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -983,6 +983,7 @@ struct address_space *page_file_mapping(struct page *page)
static inline int PageAnon(struct page *page)
{
+ page = compound_head(page);
return ((unsigned long)page->mapping & PAGE_MAPPING_ANON) != 0;
}
--
2.1.1
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