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Wed, 13 Feb 2019 04:37:40 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nxp.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=0y+CMxlYGjBqSTs5EfvGxbCuw8gnwEzEUyS28UM/TFk=; b=KXx483fJQqnM97fRhX1x2P2/KKPL7YYLKoJl7MjyohT1Bw5jnBSqyL+3s4MsTyghq6j4n9Hhf/qK4gOVhnWxbVtB5M2YOvKUwW8UiUOBEPTGMAWAx9BedO0Hcxlk/L6Qvpd+OKeuHOz+jcnEiu/LCYt2BXzKjFPAM33BUgJCNy0= Received: from DB7PR04MB4490.eurprd04.prod.outlook.com (52.135.138.16) by DB7PR04MB5323.eurprd04.prod.outlook.com (20.176.236.147) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1601.21; Wed, 13 Feb 2019 09:37:29 +0000 Received: from DB7PR04MB4490.eurprd04.prod.outlook.com ([fe80::fd45:a391:7591:1aa5]) by DB7PR04MB4490.eurprd04.prod.outlook.com ([fe80::fd45:a391:7591:1aa5%6]) with mapi id 15.20.1601.023; Wed, 13 Feb 2019 09:37:29 +0000 From: Peng Fan To: "catalin.marinas@arm.com" , "will.deacon@arm.com" , "mark.rutland@arm.com" , "ard.biesheuvel@linaro.org" , "yaojun8558363@gmail.com" , "cpandya@codeaurora.org" , "robin.murphy@arm.com" CC: "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , "van.freenix@gmail.com" , Peng Fan Subject: [PATCH 2/3] arm64: mmu: early_pgtable_alloc: remove unnecessary comments Thread-Topic: [PATCH 2/3] arm64: mmu: early_pgtable_alloc: remove unnecessary comments Thread-Index: AQHUw3+88usP6fkoZk2E9fP50sbv3g== Date: Wed, 13 Feb 2019 09:37:29 +0000 Message-ID: <20190213094831.7292-2-peng.fan@nxp.com> References: <20190213094831.7292-1-peng.fan@nxp.com> In-Reply-To: <20190213094831.7292-1-peng.fan@nxp.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: git-send-email 2.16.4 x-clientproxiedby: HK0PR04CA0013.apcprd04.prod.outlook.com (2603:1096:203:36::25) To DB7PR04MB4490.eurprd04.prod.outlook.com (2603:10a6:5:35::16) authentication-results: spf=none (sender IP is ) smtp.mailfrom=peng.fan@nxp.com; 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received-spf: None (protection.outlook.com: nxp.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: FVhzmuFnJqLGsMVdR5ZGmSDHSdqnrjWGNYJ3yw/0qY1D6rv5Obo0RdRtBnNkFV2liBaZaBkvtHfO2YTm0H6YV+XE6rWLFEQS5FT03fUvqUda4Kamo1/BDtL9HN5iGZ3ufCG+Y9lEmLATtIPyOektFKaXDG/5t7eQhLWijO/yX7sxuLIMY1IFQ+arWP70gs9CqZbnDzrISNRWYw1fq4qoGuzQmsFS0NTY2cIFJwny/fqY16anewBPNyA6e9MnAs4iUv0Z7NAbJZ0+eFuNboqwE+CTjLD+v+XuKBaGx0LCd/Zu29nP3MybdS5C9587uTtq/TQNRCMEcx3R8s7BY4CVgpHxa4GBxhfiZy3LfWG6ZxqhtHLrMzSs4uIiz8YT3C4TQGHYJ6rJuGzBGoYUhhXhEC3lRwIPRt96vPjU30+qwQo= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 7f962ffb-6f8d-4792-6735-08d69196de94 X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Feb 2019 09:37:24.7096 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB7PR04MB5323 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The empty zero page has been moved to bss area by commit 5227cfa71f9e ("arm64: mm: place empty_zero_page in bss"), and it alreay added "dsb ishst" in head.S to make sure the empty zero page visible to PTW. There is no code to reflect the comment, so remove it. Signed-off-by: Peng Fan --- arch/arm64/mm/mmu.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 065202da3ad2..f61fa7c8fd2e 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -113,10 +113,6 @@ static phys_addr_t __init early_pgtable_alloc(void) =20 memset(ptr, 0, PAGE_SIZE); =20 - /* - * Implicit barriers also ensure the zeroed page is visible to the page - * table walker - */ pte_clear_fixmap(); =20 return phys; --=20 2.16.4