Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Mon, 7 May 2018 15:42:15 +0800
From:   Jisheng Zhang <Jisheng.Zhang@synaptics.com>
To:     Neil Armstrong <narmstrong@baylibre.com>
Cc:     Russell King <linux@armlinux.org.uk>,
        linux-arm-kernel@lists.infradead.org, linux-oxnas@groups.io,
        linux-kernel@vger.kernel.org
Subject: [PATCH] arm: oxnas: remove non-necessary flush_cache_all()
Message-ID: <20180507154215.45a9348f@xhacker.debian>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Received-SPF: None (protection.outlook.com: synaptics.com does not designate
 permitted sender hosts)
SpamDiagnosticOutput: 1:99
SpamDiagnosticMetadata: NSPM
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 May 2018 07:42:50.7442 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: 0b3b9591-6ad9-47f4-414c-08d5b3ee2397
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 335d1fbc-2124-4173-9863-17e7051a2a0e
X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN6PR03MB2625
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

I believe the flush_cache_all() after scu_enable() is to "Ensure that
the data accessed by CPU0 before the SCU was initialised is visible
to the other CPUs." as commented in scu_enable(). So flush_cache_all()
here is a duplication of the one in scu_enable(), remove it.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
---
 arch/arm/mach-oxnas/platsmp.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/arch/arm/mach-oxnas/platsmp.c b/arch/arm/mach-oxnas/platsmp.c
index 442cc8a2f7dc..1a8e1e9fc222 100644
--- a/arch/arm/mach-oxnas/platsmp.c
+++ b/arch/arm/mach-oxnas/platsmp.c
@@ -85,7 +85,6 @@ static void __init ox820_smp_prepare_cpus(unsigned int max_cpus)
 		goto unmap_scu;
 
 	scu_enable(scu_base);
-	flush_cache_all();
 
 unmap_scu:
 	iounmap(scu_base);
-- 
2.17.0