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Date: Fri, 19 Oct 2012 18:06:16 -0700 From: tip-bot for Gerald Schaefer <gerald.schaefer@...ibm.com> To: linux-tip-commits@...r.kernel.org Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org, peterz@...radead.org, schwidefsky@...ibm.com, gerald.schaefer@...ibm.com, ralf@...ux-mips.org, heiko.carstens@...ibm.com, tglx@...utronix.de, sfr@...b.auug.org.au Subject: [tip:numa/core] s390/thp: implement pmd_pgprot() for s390 Commit-ID: ca6cfbe6d25cdf9ed81cbf26c2146eda17a70472 Gitweb: http://git.kernel.org/tip/ca6cfbe6d25cdf9ed81cbf26c2146eda17a70472 Author: Gerald Schaefer <gerald.schaefer@...ibm.com> AuthorDate: Thu, 18 Oct 2012 18:26:42 +0200 Committer: Ingo Molnar <mingo@...nel.org> CommitDate: Fri, 19 Oct 2012 23:38:48 +0200 s390/thp: implement pmd_pgprot() for s390 Git commit "mm/thp: Preserve pgprot across huge page split" introduced a pmd_pgprot() function, which is missing on s390, resulting in a compile error in linux-next where THP is enabled on s390 as well. This patch adds an implementation of pmd_pgprot() for s390. Reported-by: Stephen Rothwell <sfr@...b.auug.org.au> Signed-off-by: Gerald Schaefer <gerald.schaefer@...ibm.com> Cc: Martin Schwidefsky <schwidefsky@...ibm.com> Cc: Heiko Carstens <heiko.carstens@...ibm.com> Cc: Peter Zijlstra <peterz@...radead.org> Cc: Ralf Baechle <ralf@...ux-mips.org> Link: http://lkml.kernel.org/r/20121018182642.2a541275@thinkpad Signed-off-by: Ingo Molnar <mingo@...nel.org> --- arch/s390/include/asm/pgtable.h | 13 +++++++++++++ 1 files changed, 13 insertions(+), 0 deletions(-) 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; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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