From patchwork Tue Apr 5 06:14:10 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Benjamin Herrenschmidt X-Patchwork-Id: 89783 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 354EA102369 for ; Tue, 5 Apr 2011 16:17:28 +1000 (EST) Received: by ozlabs.org (Postfix) id 83986B700A; Tue, 5 Apr 2011 16:14:22 +1000 (EST) Delivered-To: linuxppc-dev@ozlabs.org Received: from e23smtp04.au.ibm.com (e23smtp04.au.ibm.com [202.81.31.146]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "e23smtp04.au.ibm.com", Issuer "GeoTrust SSL CA" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 5B270B7000 for ; Tue, 5 Apr 2011 16:14:22 +1000 (EST) Received: from d23relay05.au.ibm.com (d23relay05.au.ibm.com [202.81.31.247]) by e23smtp04.au.ibm.com (8.14.4/8.13.1) with ESMTP id p3568eHq020356 for ; Tue, 5 Apr 2011 16:08:40 +1000 Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay05.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id p356EL0p536632 for ; Tue, 5 Apr 2011 16:14:21 +1000 Received: from d23av03.au.ibm.com (loopback [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id p356ELlo011130 for ; Tue, 5 Apr 2011 16:14:21 +1000 Received: from ozlabs.au.ibm.com (ozlabs.au.ibm.com [9.190.163.12]) by d23av03.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id p356EKAj011061; Tue, 5 Apr 2011 16:14:21 +1000 Received: from grosgo.ozlabs.ibm.com (haven.au.ibm.com [9.190.164.82]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id F354973A44; Tue, 5 Apr 2011 16:14:20 +1000 (EST) From: Benjamin Herrenschmidt To: linuxppc-dev@ozlabs.org Subject: [PATCH 14/15] powerpc: Perform an isync to synchronize CPUs coming out of secondary_hold Date: Tue, 5 Apr 2011 16:14:10 +1000 Message-Id: <1301984051-18413-15-git-send-email-benh@kernel.crashing.org> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1301984051-18413-1-git-send-email-benh@kernel.crashing.org> References: <1301984051-18413-1-git-send-email-benh@kernel.crashing.org> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org We need to do that to guarantee they see any code change done by dynamic patching during boot. Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/kernel/head_64.S | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 370afd4..2505f78 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -147,6 +147,8 @@ __secondary_hold: mtctr r4 mr r3,r24 li r4,0 + /* Make sure that patched code is visible */ + isync bctr #else BUG_OPCODE