On 12/08/2015 10:01 AM, Thomas Gleixner wrote:
> static inline int pte_allows_gup(unsigned long pteval, int write)
> {
> unsigned long mask = _PAGE_PRESENT|_PAGE_USER;
>
> if (write)
> mask |= _PAGE_RW;
>
> if ((pteval & mask) != mask)
> return 0;
>
> if (!__pkru_allows_pkey(pte_flags_pkey(pteval), write))
> return 0;
> return 1;
> }
>
> and at the callsites do:
>
> if (pte_allows_gup(pte_val(pte, write))
>
> if (pte_allows_gup(pmd_val(pmd, write))
>
> if (pte_allows_gup(pud_val(pud, write))
>
> Hmm?
Looks fine to me. I'll do that.
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