From: Gerald Schaefer <[email protected]> This patch adds an implementation of pmd_pgprot() for s390, in preparation to future THP changes.
Reported-by: Stephen Rothwell <[email protected]> Signed-off-by: Gerald Schaefer <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: Heiko Carstens <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ralf Baechle <[email protected]> Signed-off-by: Ingo Molnar <[email protected]> --- arch/s390/include/asm/pgtable.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index dd647c9..098fc5a 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1240,6 +1240,19 @@ static inline void set_pmd_at(struct mm_struct *mm, unsigned long addr, *pmdp = entry; } +static inline pgprot_t pmd_pgprot(pmd_t pmd) +{ + pgprot_t prot = PAGE_RW; + + if (pmd_val(pmd) & _SEGMENT_ENTRY_RO) { + if (pmd_val(pmd) & _SEGMENT_ENTRY_INV) + prot = PAGE_NONE; + else + prot = PAGE_RO; + } + return prot; +} + static inline unsigned long massage_pgprot_pmd(pgprot_t pgprot) { unsigned long pgprot_pmd = 0; -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
