From patchwork Wed Apr 3 13:09:10 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: chenhui zhao X-Patchwork-Id: 233444 X-Patchwork-Delegate: galak@kernel.crashing.org Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [IPv6:::1]) by ozlabs.org (Postfix) with ESMTP id E10132C0221 for ; Thu, 4 Apr 2013 00:08:50 +1100 (EST) Received: from co9outboundpool.messaging.microsoft.com (co9ehsobe005.messaging.microsoft.com [207.46.163.28]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client CN "mail.global.frontbridge.com", Issuer "Microsoft Secure Server Authority" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 2CA392C00A9 for ; Thu, 4 Apr 2013 00:08:22 +1100 (EST) Received: from mail43-co9-R.bigfish.com (10.236.132.253) by CO9EHSOBE038.bigfish.com (10.236.130.101) with Microsoft SMTP Server id 14.1.225.23; Wed, 3 Apr 2013 13:08:18 +0000 Received: from mail43-co9 (localhost [127.0.0.1]) by mail43-co9-R.bigfish.com (Postfix) with ESMTP id A0EEDA40174 for ; Wed, 3 Apr 2013 13:08:18 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 0 X-BigFish: VS0(zzzz1f42h1fc6h1ee6h1de0h1202h1e76h1d1ah1d2ahzz8275bhz2dh2a8h668h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h1354h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1155h) Received: from mail43-co9 (localhost.localdomain [127.0.0.1]) by mail43-co9 (MessageSwitch) id 1364994497531_5464; Wed, 3 Apr 2013 13:08:16 +0000 (UTC) Received: from CO9EHSMHS016.bigfish.com (unknown [10.236.132.254]) by mail43-co9.bigfish.com (Postfix) with ESMTP id EF2EC30006E for ; Wed, 3 Apr 2013 13:08:16 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by CO9EHSMHS016.bigfish.com (10.236.130.26) with Microsoft SMTP Server (TLS) id 14.1.225.23; Wed, 3 Apr 2013 13:08:13 +0000 Received: from tx30smr01.am.freescale.net (10.81.153.31) by 039-SN1MMR1-004.039d.mgd.msft.net (10.84.1.14) with Microsoft SMTP Server (TLS) id 14.2.328.11; Wed, 3 Apr 2013 13:08:12 +0000 Received: from localhost.localdomain ([10.193.20.174]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id r33D87lW019893; Wed, 3 Apr 2013 06:08:10 -0700 From: Zhao Chenhui To: Subject: [PATCH 02/17] powerpc/85xx: do not sync time base at boot time Date: Wed, 3 Apr 2013 21:09:10 +0800 Message-ID: <1364994565-16010-2-git-send-email-chenhui.zhao@freescale.com> X-Mailer: git-send-email 1.7.3 In-Reply-To: <1364994565-16010-1-git-send-email-chenhui.zhao@freescale.com> References: <1364994565-16010-1-git-send-email-chenhui.zhao@freescale.com> MIME-Version: 1.0 X-OriginatorOrg: freescale.com X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" From: Chen-Hui Zhao The bootloader have done time base sync for all cores, so skip the synchronization process at boot time of kernel. Signed-off-by: Zhao Chenhui Signed-off-by: Li Yang Signed-off-by: Andy Fleming --- arch/powerpc/platforms/85xx/smp.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/platforms/85xx/smp.c b/arch/powerpc/platforms/85xx/smp.c index 6a17599..35dae8e 100644 --- a/arch/powerpc/platforms/85xx/smp.c +++ b/arch/powerpc/platforms/85xx/smp.c @@ -62,6 +62,10 @@ static void mpc85xx_give_timebase(void) { unsigned long flags; + /* only do time base sync when system is running */ + if (system_state == SYSTEM_BOOTING) + return; + local_irq_save(flags); while (!tb_req) @@ -85,6 +89,10 @@ static void mpc85xx_take_timebase(void) { unsigned long flags; + /* only do time base sync when system is running */ + if (system_state == SYSTEM_BOOTING) + return; + local_irq_save(flags); tb_req = 1;