From: Kirill Tkhai <tkhai@xxxxxxxxx>
Date: Mon, 25 Feb 2013 17:05:18 +0400
> Should we account none pages in pte_present instead of above like this?
>
> static inline int srmmu_pte_present(pte_t pte)
> { return ((pte_val(pte) & SRMMU_ET_MASK) == SRMMU_ET_PTE) ||
> ((pte_val(pte) & SRMMU_PAGE_NONE) == SRMMU_PAGE_NONE); }
No, I don't think that is what we should do.
Instead, we should use the SRMMU_NOREAD bit to encode SRMMU_PAGE_NONE
pte's. Then you make SRMMU_PAGE_NONE set SRMMU_ET_PTE but also
SRMMU_NOREAD.
Then you'll need no changes at all to srmmu_pte_present() or
SRMMU_CHG_MASK.
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