From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx122.postini.com [74.125.245.122]) by kanga.kvack.org (Postfix) with SMTP id 44A976B007D for ; Fri, 16 Nov 2012 11:25:45 -0500 (EST) Received: by mail-ee0-f41.google.com with SMTP id d41so2125055eek.14 for ; Fri, 16 Nov 2012 08:25:44 -0800 (PST) From: Ingo Molnar Subject: [PATCH 05/19] sched, numa, mm, s390/thp: Implement pmd_pgprot() for s390 Date: Fri, 16 Nov 2012 17:25:07 +0100 Message-Id: <1353083121-4560-6-git-send-email-mingo@kernel.org> In-Reply-To: <1353083121-4560-1-git-send-email-mingo@kernel.org> References: <1353083121-4560-1-git-send-email-mingo@kernel.org> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org, linux-mm@kvack.org Cc: Paul Turner , Lee Schermerhorn , Christoph Lameter , Rik van Riel , Mel Gorman , Andrew Morton , Andrea Arcangeli , Linus Torvalds , Peter Zijlstra , Thomas Gleixner , Hugh Dickins , Gerald Schaefer , Martin Schwidefsky , Heiko Carstens , Peter Zijlstra , Ralf Baechle From: Gerald Schaefer This patch adds an implementation of pmd_pgprot() for s390, in preparation to future THP changes. Reported-by: Stephen Rothwell Signed-off-by: Gerald Schaefer Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: Peter Zijlstra Cc: Ralf Baechle Signed-off-by: Ingo Molnar --- 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org