mm-memory-failure-introduce-get_hwpoison_page-for-consistent-refcount…

…-handling-fix

fix CONFIG_HWPOISON_INJECT=m

Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

mm/memory-failure.c

@@ -946,6 +946,7 @@ int get_hwpoison_page(struct page *page)
 
 	return get_page_unless_zero(page);
 }
+EXPORT_SYMBOL_GPL(get_hwpoison_page);
 
 /*
  * Do all that is necessary to remove user space mappings. Unmap