> -     else if (PageTransCompound(page))
> +     /*
> +      * PageTransCompound can be true for non-huge compound pages (slab
> +      * pages or pages allocated by drivers with __GFP_COMP) because it
> +      * just checks PG_head/PG_tail, so we need to check PageLRU to make
> +      * sure a given page is a thp, not a non-huge compound page.
> +      */
> +     else if (PageTransCompound(page) && PageLRU(compound_trans_head(page)))
>               u |= 1 << KPF_THP;

Reviewed-by: Fengguang Wu <[email protected]>

Thanks!
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