From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f49.google.com (mail-pa0-f49.google.com [209.85.220.49]) by kanga.kvack.org (Postfix) with ESMTP id 93B5C6B0044 for ; Fri, 18 Jul 2014 02:52:52 -0400 (EDT) Received: by mail-pa0-f49.google.com with SMTP id hz1so4772986pad.8 for ; Thu, 17 Jul 2014 23:52:52 -0700 (PDT) Received: from lgeamrelo04.lge.com (lgeamrelo04.lge.com. [156.147.1.127]) by mx.google.com with ESMTP id oy7si2394925pdb.499.2014.07.17.23.52.50 for ; Thu, 17 Jul 2014 23:52:51 -0700 (PDT) From: Minchan Kim Subject: [PATCH v13 6/8] arm: add pmd_[dirty|mkclean] for THP Date: Fri, 18 Jul 2014 15:53:04 +0900 Message-Id: <1405666386-15095-7-git-send-email-minchan@kernel.org> In-Reply-To: <1405666386-15095-1-git-send-email-minchan@kernel.org> References: <1405666386-15095-1-git-send-email-minchan@kernel.org> Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Michael Kerrisk , Linux API , Hugh Dickins , Johannes Weiner , Rik van Riel , KOSAKI Motohiro , Mel Gorman , Jason Evans , Zhang Yanfei , "Kirill A. Shutemov" , Minchan Kim , Catalin Marinas , Will Deacon , Steve Capper , Russell King , linux-arm-kernel@lists.infradead.org MADV_FREE needs pmd_dirty and pmd_mkclean for detecting recent overwrite of the contents since MADV_FREE syscall is called for THP page. This patch adds pmd_dirty and pmd_mkclean for THP page MADV_FREE support. Cc: Catalin Marinas Cc: Will Deacon Cc: Steve Capper Cc: Russell King Cc: linux-arm-kernel@lists.infradead.org Signed-off-by: Minchan Kim --- arch/arm/include/asm/pgtable-3level.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/include/asm/pgtable-3level.h b/arch/arm/include/asm/pgtable-3level.h index 85c60adc8b60..830f84f2d277 100644 --- a/arch/arm/include/asm/pgtable-3level.h +++ b/arch/arm/include/asm/pgtable-3level.h @@ -220,6 +220,8 @@ static inline pmd_t *pmd_offset(pud_t *pud, unsigned long addr) #define pmd_trans_splitting(pmd) (pmd_val(pmd) & PMD_SECT_SPLITTING) #endif +#define pmd_dirty(pmd) (pmd_val(pmd) & PMD_SECT_DIRTY) + #define PMD_BIT_FUNC(fn,op) \ static inline pmd_t pmd_##fn(pmd_t pmd) { pmd_val(pmd) op; return pmd; } @@ -228,6 +230,7 @@ PMD_BIT_FUNC(mkold, &= ~PMD_SECT_AF); PMD_BIT_FUNC(mksplitting, |= PMD_SECT_SPLITTING); PMD_BIT_FUNC(mkwrite, &= ~PMD_SECT_RDONLY); PMD_BIT_FUNC(mkdirty, |= PMD_SECT_DIRTY); +PMD_BIT_FUNC(mkclean, &= ~PMD_SECT_DIRTY); PMD_BIT_FUNC(mkyoung, |= PMD_SECT_AF); #define pmd_mkhuge(pmd) (__pmd(pmd_val(pmd) & ~PMD_TABLE_BIT)) -- 2.0.0 -- 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