From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752306AbeBHRWR (ORCPT ); Thu, 8 Feb 2018 12:22:17 -0500 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70]:37826 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751988AbeBHRWQ (ORCPT ); Thu, 8 Feb 2018 12:22:16 -0500 Date: Thu, 8 Feb 2018 11:22:13 -0600 From: Kim Phillips To: Mathieu Poirier Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Suzuki K Poulose Subject: Re: [PATCH] coresight replicator: set default y after Kconfig rename Message-Id: <20180208112213.2f466a1c09f942e8e158a168@arm.com> In-Reply-To: References: <20180207150351.ce930e929bc0d7f6cfb1aa56@arm.com> Organization: Arm X-Mailer: Sylpheed 3.5.1 (GTK+ 2.24.31; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 8 Feb 2018 08:59:30 -0700 Mathieu Poirier wrote: > On 7 February 2018 at 14:03, Kim Phillips wrote: > > Commit 1c8859848dbb ("coresight replicator: Cleanup programmable > > replicator naming") changed the Kconfig symbol name from > > QCOM_REPLICATOR, which, whilst not in the single arm64 defconfig, > > was being set in my juno build script, which left the new symbol unset, > > causing the following unexpected grief: > > > > # ./perf record -vvv -C 0 -e cs_etm/@20070000.etr/ --per-thread true > > .... > > sys_perf_event_open: pid -1 cpu 0 group_fd -1 flags 0x8 = 5 > > mmap size 528384B > > AUX area mmap length 4194304 > > perf event ring buffer mmapped per cpu > > failed to mmap AUX area > > failed to mmap with 12 (Cannot allocate memory) > > > > Make it default y to help not surprise unsuspecting users. > > > > Fixes: 1c8859848dbb ("coresight replicator: Cleanup programmable replicator naming") > > Cc: Mathieu Poirier > > Cc: Suzuki K Poulose > > Signed-off-by: Kim Phillips > > --- > > drivers/hwtracing/coresight/Kconfig | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig > > index ef9cb3c164e1..b94bbd95efa6 100644 > > --- a/drivers/hwtracing/coresight/Kconfig > > +++ b/drivers/hwtracing/coresight/Kconfig > > @@ -73,6 +73,7 @@ config CORESIGHT_SOURCE_ETM4X > > config CORESIGHT_DYNAMIC_REPLICATOR > > bool "CoreSight Programmable Replicator driver" > > depends on CORESIGHT_LINKS_AND_SINKS > > + default y > > help > > This enables support for dynamic CoreSight replicator link driver. > > The programmable ATB replicator allows independent filtering of the > > As I said before don't see why it needs to be treated differently than other CS > blocks I don't think it does either, but this one is special since it recently underwent a rename, which breaks its users that were setting the old name in their config builds. The default y keeps it set in those cases, thereby discontinuing any such regression. > - intelligent replicators show up on the AMBA bus and need to > be declared in the DT. As such people are expected to enable the proper > option. The driver should only run given a replicator in the device tree; if that's not the case, then that's another problem, and orthogonal to this one. Kim