From patchwork Fri Jul 18 06:53:04 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Minchan Kim X-Patchwork-Id: 4580971 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0BA979F1D6 for ; Fri, 18 Jul 2014 06:55:44 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 4D8E220176 for ; Fri, 18 Jul 2014 06:55:43 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7AA3B20120 for ; Fri, 18 Jul 2014 06:55:42 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1X822k-0005gY-A7; Fri, 18 Jul 2014 06:53:22 +0000 Received: from lgeamrelo04.lge.com ([156.147.1.127]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1X822h-0005CY-AK for linux-arm-kernel@lists.infradead.org; Fri, 18 Jul 2014 06:53:20 +0000 Received: from unknown (HELO localhost.localdomain) (10.177.222.156) by 156.147.1.127 with ESMTP; 18 Jul 2014 15:52:48 +0900 X-Original-SENDERIP: 10.177.222.156 X-Original-MAILFROM: minchan@kernel.org From: Minchan Kim To: Andrew Morton 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> X-Mailer: git-send-email 2.0.0 In-Reply-To: <1405666386-15095-1-git-send-email-minchan@kernel.org> References: <1405666386-15095-1-git-send-email-minchan@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20140717_235319_800303_36445837 X-CRM114-Status: UNSURE ( 8.13 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.0 (/) Cc: Jason Evans , Rik van Riel , Catalin Marinas , Minchan Kim , Linux API , Hugh Dickins , linux-kernel@vger.kernel.org, Will Deacon , Russell King , linux-mm@kvack.org, Zhang Yanfei , Michael Kerrisk , KOSAKI Motohiro , Johannes Weiner , "Kirill A. Shutemov" , Steve Capper , linux-arm-kernel@lists.infradead.org, Mel Gorman X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Acked-by: Steve Capper --- 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))