Instead of bothering to store the index, why not just calculate it, like:
On 04/15/2013 08:37 PM, zhang.yi20@xxxxxxxxxx wrote:
> +static inline int get_page_compound_index(struct page *page)
> +{
> + if (PageHead(page))
> + return 0;
> + return compound_head(page) - page;
> +}
BTW, you've really got to get your mail client fixed. Your patch is
still line-wrapped.
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