From patchwork Mon Dec 14 13:27:43 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ashok Kumar X-Patchwork-Id: 7844641 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 [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 2E3EA9F3CD for ; Mon, 14 Dec 2015 13:30:21 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 6043B203DF for ; Mon, 14 Dec 2015 13:30:20 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7F0CA203C1 for ; Mon, 14 Dec 2015 13:30:18 +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 1a8TBV-0000iG-25; Mon, 14 Dec 2015 13:29:01 +0000 Received: from mail-gw3-out.broadcom.com ([216.31.210.64]) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1a8TB6-0000Ev-Oj for linux-arm-kernel@lists.infradead.org; Mon, 14 Dec 2015 13:28:37 +0000 X-IronPort-AV: E=Sophos;i="5.20,427,1444719600"; d="scan'208";a="83116486" Received: from irvexchcas08.broadcom.com (HELO IRVEXCHCAS08.corp.ad.broadcom.com) ([10.9.208.57]) by mail-gw3-out.broadcom.com with ESMTP; 14 Dec 2015 06:02:53 -0800 Received: from IRVEXCHSMTP2.corp.ad.broadcom.com (10.9.207.52) by IRVEXCHCAS08.corp.ad.broadcom.com (10.9.208.57) with Microsoft SMTP Server (TLS) id 14.3.235.1; Mon, 14 Dec 2015 05:28:11 -0800 Received: from mail-sj1-12.sj.broadcom.com (10.10.10.20) by IRVEXCHSMTP2.corp.ad.broadcom.com (10.9.207.52) with Microsoft SMTP Server id 14.3.235.1; Mon, 14 Dec 2015 05:28:12 -0800 Received: from lc-sj1-5011.broadcom.com (lc-sj1-5011.sj.broadcom.com [10.66.65.229]) by mail-sj1-12.sj.broadcom.com (Postfix) with ESMTP id EA18227A81; Mon, 14 Dec 2015 05:28:11 -0800 (PST) Received: by lc-sj1-5011.broadcom.com (Postfix, from userid 31394) id E4AFE2011B5; Mon, 14 Dec 2015 05:28:11 -0800 (PST) From: Ashok Kumar To: , , , Subject: [RFC PATCH 1/2] arm64: Defer dcache flush in __cpu_copy_user_page Date: Mon, 14 Dec 2015 05:27:43 -0800 Message-ID: <1450099664-38554-2-git-send-email-ashoks@broadcom.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1450099664-38554-1-git-send-email-ashoks@broadcom.com> References: <1450099664-38554-1-git-send-email-ashoks@broadcom.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151214_052837_019316_88CA8B8C X-CRM114-Status: UNSURE ( 8.42 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -4.2 (----) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ashok Kumar Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_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 Defer dcache flushing to __sync_icache_dcache by calling flush_dcache_page which clears PG_dcache_clean flag. Signed-off-by: Ashok Kumar Acked-by: Catalin Marinas --- arch/arm64/mm/copypage.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/mm/copypage.c b/arch/arm64/mm/copypage.c index 13bbc3be..22e4cb4 100644 --- a/arch/arm64/mm/copypage.c +++ b/arch/arm64/mm/copypage.c @@ -24,8 +24,9 @@ void __cpu_copy_user_page(void *kto, const void *kfrom, unsigned long vaddr) { + struct page *page = virt_to_page(kto); copy_page(kto, kfrom); - __flush_dcache_area(kto, PAGE_SIZE); + flush_dcache_page(page); } EXPORT_SYMBOL_GPL(__cpu_copy_user_page);