On Mon, 10 Aug 2015 19:28:21 +0800 Wanpeng Li <wanpeng...@hotmail.com> wrote:
> Introduce put_hwpoison_page to put refcount for memory
> error handling.
>
> ...
>
> --- a/mm/memory-failure.c
> +++ b/mm/memory-failure.c
> @@ -922,6 +922,27 @@ int get_hwpoison_page(struct page *page)
> }
> EXPORT_SYMBOL_GPL(get_hwpoison_page);
>
> +/**
> + * put_hwpoison_page() - Put refcount for memory error handling:
> + * @page: raw error page (hit by memory error)
> + */
> +void put_hwpoison_page(struct page *page)
> +{
> + struct page *head = compound_head(page);
> +
> + if (PageHuge(head)) {
> + put_page(head);
> + return;
> + }
> +
> + if (PageTransHuge(head))
> + if (page != head)
> + put_page(head);
> +
> + put_page(page);
> +}
> +EXPORT_SYMBOL_GPL(put_hwpoison_page);
I don't believe the export is needed?
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