From patchwork Thu Sep 1 12:49:19 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russell King - ARM Linux X-Patchwork-Id: 1119272 Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by demeter2.kernel.org (8.14.4/8.14.4) with ESMTP id p81E5Aq2027736 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Thu, 1 Sep 2011 14:05:35 GMT Received: from canuck.infradead.org ([2001:4978:20e::1]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qz7sM-0002bc-Cv; Thu, 01 Sep 2011 14:04:16 +0000 Received: from localhost ([127.0.0.1] helo=canuck.infradead.org) by canuck.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Qz7sL-0003Qx-E8; Thu, 01 Sep 2011 14:04:13 +0000 Received: from caramon.arm.linux.org.uk ([2002:4e20:1eda::1]) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qz7r0-0002mf-5P for linux-arm-kernel@lists.infradead.org; Thu, 01 Sep 2011 14:02:52 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=arm.linux.org.uk; s=caramon; h=Date:Sender:Message-Id:Content-Type:MIME-Version:Cc:Subject:Cc:To:From:References:In-Reply-To; bh=xjMInPHaGpfiCo9TKHhjGzCvFga5j3eUgwqupYSYq78=; b=dEaE3opkWVL2JohSQHKNovOldgHPoVJbIazTVS3SrlZRflqzxYoO7znjJ1XD9q5frD8BubCOrmIlW/19UdPYHNukYyuqQZbgS9tgz8q+AJcdLv3RoC39/rc+LLAqqgKjVbV5hfj2KOQwgffNZ6TeKE57VuyzP8x7NmTUkSP+4so=; Received: from e0022681537dd.dyn.arm.linux.org.uk ([2002:4e20:1eda:1:222:68ff:fe15:37dd] helo=rmk-PC.arm.linux.org.uk) by caramon.arm.linux.org.uk with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.72) (envelope-from ) id 1Qz7oF-0004G0-1l; Thu, 01 Sep 2011 14:59:59 +0100 Received: from rmk by rmk-PC.arm.linux.org.uk with local (Exim 4.76) (envelope-from ) id 1Qz6hr-00078J-2k; Thu, 01 Sep 2011 13:49:19 +0100 In-Reply-To: <20110901124752.GE29729@n2100.arm.linux.org.uk> References: <20110901124752.GE29729@n2100.arm.linux.org.uk> From: Russell King - ARM Linux To: Santosh Shilimkar Subject: [PATCH 03/11] ARM: pm: some ARMv7 requires a dsb in resume to ensure correctness MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Thu, 01 Sep 2011 13:49:19 +0100 X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110901_100251_437374_C780D82D X-CRM114-Status: GOOD ( 13.23 ) X-Spam-Score: -0.6 (/) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (-0.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.5 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature Cc: linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter2.kernel.org [140.211.167.43]); Thu, 01 Sep 2011 14:05:35 +0000 (UTC) Add a dsb after the isb to ensure that the previous writes to the CP15 registers take effect before we enable the MMU. Signed-off-by: Russell King --- arch/arm/mm/proc-v7.S | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S index dec72ee..a773f4e 100644 --- a/arch/arm/mm/proc-v7.S +++ b/arch/arm/mm/proc-v7.S @@ -255,6 +255,7 @@ ENTRY(cpu_v7_do_resume) mcr p15, 0, r4, c10, c2, 0 @ write PRRR mcr p15, 0, r5, c10, c2, 1 @ write NMRR isb + dsb mov r0, r9 @ control register mov r2, r7, lsr #14 @ get TTB0 base mov r2, r2, lsl #14