s390/pgtable: make pmd and pud helper functions available
Make pmd_wrprotect() and pmd_mkwrite() available independently from CONFIG_TRANSPARENT_HUGEPAGE and CONFIG_HUGETLB_PAGE so these can be used on the kernel mapping. Also introduce a couple of pud helper functions, namely pud_pfn(), pud_wrprotect(), pud_mkwrite(), pud_mkdirty() and pud_mkclean() which only work on the kernel mapping. Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com> Acked-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
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