From patchwork Wed Jun 29 09:22:55 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: 927852 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 p5T9PStr026932 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Wed, 29 Jun 2011 09:25:48 GMT Received: from canuck.infradead.org ([134.117.69.58]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1QbqzZ-00080c-RY; Wed, 29 Jun 2011 09:23:30 +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 1QbqzZ-0001Um-2T; Wed, 29 Jun 2011 09:23:29 +0000 Received: from [2002:4e20:1eda::1] (helo=caramon.arm.linux.org.uk) by canuck.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Qbqz5-0001M6-K3 for linux-arm-kernel@lists.infradead.org; Wed, 29 Jun 2011 09:23:00 +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:Subject:To:From:References:In-Reply-To; bh=Dh1dHyEnWz6oAHBEtdLsQHE86htKQZDabOxdUTAuSFc=; b=N3C4mFk9uVfjUEbrhQ+wLoEfncNf9srooJZ7ZFuCammPdeS49YcX/Y+kXJimEpi/HepCtUEfcvX7ISTlqsRSqeK1u7fJCnx7ZAyjHHl9z70KJPWYRF6UyZmR9ePwpW5u5RsXy9nP77HTFC62knuhvSPnDS0cUpsBLSDCH65EfQk=; 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 1Qbqz2-00040w-3J for linux-arm-kernel@lists.infradead.org; Wed, 29 Jun 2011 10:22:56 +0100 Received: from rmk by rmk-PC.arm.linux.org.uk with local (Exim 4.76) (envelope-from ) id 1Qbqz1-0002Fm-8I for linux-arm-kernel@lists.infradead.org; Wed, 29 Jun 2011 10:22:55 +0100 In-Reply-To: <20110629091853.GK21898@n2100.arm.linux.org.uk> References: <20110629091853.GK21898@n2100.arm.linux.org.uk> From: Russell King - ARM Linux To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 12/23] ARM: entry: instrument svc undefined exception handler with irqtrace MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Wed, 29 Jun 2011 10:22:55 +0100 X-CRM114-Version: 20090807-BlameThorstenAndJenny ( TRE 0.7.6 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20110629_052300_207558_15CCF9E4 X-CRM114-Status: GOOD ( 11.44 ) X-Spam-Score: 1.2 (+) X-Spam-Report: SpamAssassin version 3.3.1 on canuck.infradead.org summary: Content analysis details: (1.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -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 1.3 RDNS_NONE Delivered to internal network by a host with no rDNS 0.0 TO_NO_BRKTS_NORDNS To: misformatted and no rDNS 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]); Wed, 29 Jun 2011 09:25:49 +0000 (UTC) Add irqtrace function calls to the undefined exception handler, so that we get sane lockdep traces from locking problems in undefined exception handlers. Signed-off-by: Russell King --- arch/arm/kernel/entry-armv.S | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-) diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 8048056..474934c 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -268,6 +268,10 @@ __und_svc: svc_entry #endif +#ifdef CONFIG_TRACE_IRQFLAGS + bl trace_hardirqs_off +#endif + @ @ call emulation code, which returns using r9 if it has emulated @ the instruction, or the more conventional lr if we are to treat @@ -300,6 +304,12 @@ __und_svc: @ restore SPSR and restart the instruction @ ldr r5, [sp, #S_PSR] @ Get SVC cpsr +#ifdef CONFIG_TRACE_IRQFLAGS + tst r5, #PSR_I_BIT + bleq trace_hardirqs_on + tst r5, #PSR_I_BIT + blne trace_hardirqs_off +#endif svc_exit r5 @ return from exception UNWIND(.fnend ) ENDPROC(__und_svc)