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s390/thp: respect page protection in pmd_none() and pmd_present()
Similar to pte_none() and pte_present(), the pmd functions should also respect page protection of huge pages, especially PROT_NONE. This patch also simplifies massage_pgprot_pmd() by adding new definitions for huge page protection. Signed-off-by: Gerald Schaefer <[email protected]> Signed-off-by: Martin Schwidefsky <[email protected]>
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