{"id":833369,"url":"http://patchwork.ozlabs.org/api/1.2/patches/833369/?format=json","web_url":"http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/20171102140501.87671-10-gwalbon@linux.vnet.ibm.com/","project":{"id":15,"url":"http://patchwork.ozlabs.org/api/1.2/projects/15/?format=json","name":"Ubuntu Kernel","link_name":"ubuntu-kernel","list_id":"kernel-team.lists.ubuntu.com","list_email":"kernel-team@lists.ubuntu.com","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20171102140501.87671-10-gwalbon@linux.vnet.ibm.com>","list_archive_url":null,"date":"2017-11-02T14:04:58","name":"[Artful,09/12] powerpc/perf: Fix usage of nest_imc_refc","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"62f2f4ab0a0b358531f8f0b01a5b8b131aa97cb7","submitter":{"id":71662,"url":"http://patchwork.ozlabs.org/api/1.2/people/71662/?format=json","name":"Gustavo Walbon","email":"gwalbon@linux.vnet.ibm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/ubuntu-kernel/patch/20171102140501.87671-10-gwalbon@linux.vnet.ibm.com/mbox/","series":[{"id":11509,"url":"http://patchwork.ozlabs.org/api/1.2/series/11509/?format=json","web_url":"http://patchwork.ozlabs.org/project/ubuntu-kernel/list/?series=11509","date":"2017-11-02T14:04:50","name":"Backport for Power9 Nest PMU Instrumentation","version":1,"mbox":"http://patchwork.ozlabs.org/series/11509/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/833369/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/833369/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@bilbo.ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=lists.ubuntu.com\n\t(client-ip=91.189.94.19; helo=huckleberry.canonical.com;\n\tenvelope-from=kernel-team-bounces@lists.ubuntu.com;\n\treceiver=)","Received":["from huckleberry.canonical.com (huckleberry.canonical.com\n\t[91.189.94.19])\n\tby ozlabs.org (Postfix) with ESMTP id 3ySRgd2bkHz9t3H;\n\tFri, 3 Nov 2017 01:05:33 +1100 (AEDT)","from localhost ([127.0.0.1] helo=huckleberry.canonical.com)\n\tby huckleberry.canonical.com with esmtp (Exim 4.86_2)\n\t(envelope-from )\n\tid 1eAG7d-0002Oh-Gs; Thu, 02 Nov 2017 14:05:29 +0000","from mx0a-001b2d01.pphosted.com ([148.163.156.1])\n\tby huckleberry.canonical.com with esmtps\n\t(TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.86_2)\n\t(envelope-from ) id 1eAG7b-0002JP-3g\n\tfor kernel-team@lists.ubuntu.com; Thu, 02 Nov 2017 14:05:27 +0000","from pps.filterd (m0098399.ppops.net [127.0.0.1])\n\tby mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id\n\tvA2E5HSS051029\n\tfor ; Thu, 2 Nov 2017 10:05:25 -0400","from e16.ny.us.ibm.com (e16.ny.us.ibm.com [129.33.205.206])\n\tby mx0a-001b2d01.pphosted.com with ESMTP id 2e038u6h9h-1\n\t(version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT)\n\tfor ; Thu, 02 Nov 2017 10:05:24 -0400","from localhost\n\tby e16.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use\n\tOnly! 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Violators will be prosecuted; \n\tThu, 2 Nov 2017 10:05:21 -0400","from b01ledav005.gho.pok.ibm.com (b01ledav005.gho.pok.ibm.com\n\t[9.57.199.110])\n\tby b01cxnp23034.gho.pok.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP\n\tid vA2E5L6040960104; Thu, 2 Nov 2017 14:05:21 GMT","from b01ledav005.gho.pok.ibm.com (unknown [127.0.0.1])\n\tby IMSVA (Postfix) with ESMTP id D6DDEAE05F;\n\tThu, 2 Nov 2017 10:06:07 -0400 (EDT)","from localhost (unknown [9.85.138.60])\n\tby b01ledav005.gho.pok.ibm.com (Postfix) with ESMTP id 4D40DAE034;\n\tThu, 2 Nov 2017 10:06:07 -0400 (EDT)"],"From":"Gustavo Walbon ","To":"kernel-team@lists.ubuntu.com","Subject":"[Artful][PATCH 09/12] powerpc/perf: Fix usage of nest_imc_refc","Date":"Thu, 2 Nov 2017 12:04:58 -0200","X-Mailer":"git-send-email 2.13.3","In-Reply-To":"<20171102140501.87671-1-gwalbon@linux.vnet.ibm.com>","References":"<20171102140501.87671-1-gwalbon@linux.vnet.ibm.com>","X-TM-AS-GCONF":"00","x-cbid":"17110214-0024-0000-0000-000002EC66E5","X-IBM-SpamModules-Scores":"","X-IBM-SpamModules-Versions":"BY=3.00007997; HX=3.00000241; KW=3.00000007;\n\tPH=3.00000004; SC=3.00000239; SDB=6.00940090; UDB=6.00474019;\n\tIPR=6.00720346; \n\tBA=6.00005666; NDR=6.00000001; ZLA=6.00000005; ZF=6.00000009;\n\tZB=6.00000000; \n\tZP=6.00000000; ZH=6.00000000; ZU=6.00000002; MB=3.00017836;\n\tXFM=3.00000015; UTC=2017-11-02 14:05:22","X-IBM-AV-DETECTION":"SAVI=unused REMOTE=unused XFE=unused","x-cbparentid":"17110214-0025-0000-0000-000045EA5284","Message-Id":"<20171102140501.87671-10-gwalbon@linux.vnet.ibm.com>","X-Proofpoint-Virus-Version":"vendor=fsecure engine=2.50.10432:, ,\n\tdefinitions=2017-11-02_05:, , signatures=0","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n\tpriorityscore=1501\n\tmalwarescore=0 suspectscore=1 phishscore=0 bulkscore=0 spamscore=0\n\tclxscore=1015 lowpriorityscore=0 impostorscore=0 adultscore=0\n\tclassifier=spam adjust=0 reason=mlx scancount=1\n\tengine=8.0.1-1707230000\n\tdefinitions=main-1711020178","X-BeenThere":"kernel-team@lists.ubuntu.com","X-Mailman-Version":"2.1.20","Precedence":"list","List-Id":"Kernel team discussions ","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","MIME-Version":"1.0","Content-Type":"text/plain; charset=\"utf-8\"","Content-Transfer-Encoding":"base64","Errors-To":"kernel-team-bounces@lists.ubuntu.com","Sender":"\"kernel-team\" "},"content":"From: Madhavan Srinivasan \n\nBugLink: https://bugs.launchpad.net/bugs/1481347\n\nnest_imc_refc is a reference count struct, used to track number of\nactive perf sessions using the nest units.\n\nCurrently the code accesses nest_imc_refc using node_id, which is\nincorrect, the array is indexed by node number. Meaning in the case of\nsparse node ids we index off the end of the array.\n\nFix it to use get_nest_pmu_ref() which uses the existing per-cpu\nvariable local_nest_imc_refc.\n\nFixes: 885dcd709ba91 ('powerpc/perf: Add nest IMC PMU support')\nReported-by: Dan Carpenter \nSigned-off-by: Madhavan Srinivasan \n[mpe: Tweak change log]\nSigned-off-by: Michael Ellerman \n(cherry-picked from 711bd207a233141308d0aea0d2e286ee6b4b23cd)\nSigned-off-by: Gustavo Walbon \n---\n arch/powerpc/perf/imc-pmu.c | 4 ++--\n 1 file changed, 2 insertions(+), 2 deletions(-)","diff":"diff --git a/arch/powerpc/perf/imc-pmu.c b/arch/powerpc/perf/imc-pmu.c\nindex a8f95f96d54b..9ccac86f3463 100644\n--- a/arch/powerpc/perf/imc-pmu.c\n+++ b/arch/powerpc/perf/imc-pmu.c\n@@ -404,7 +404,7 @@ static void nest_imc_counters_release(struct perf_event *event)\n \t\trc = opal_imc_counters_stop(OPAL_IMC_COUNTERS_NEST,\n \t\t\t\t\t get_hard_smp_processor_id(event->cpu));\n \t\tif (rc) {\n-\t\t\tmutex_unlock(&nest_imc_refc[node_id].lock);\n+\t\t\tmutex_unlock(&ref->lock);\n \t\t\tpr_err(\"nest-imc: Unable to stop the counters for core %d\\n\", node_id);\n \t\t\treturn;\n \t\t}\n@@ -487,7 +487,7 @@ static int nest_imc_event_init(struct perf_event *event)\n \t\trc = opal_imc_counters_start(OPAL_IMC_COUNTERS_NEST,\n \t\t\t\t\t get_hard_smp_processor_id(event->cpu));\n \t\tif (rc) {\n-\t\t\tmutex_unlock(&nest_imc_refc[node_id].lock);\n+\t\t\tmutex_unlock(&ref->lock);\n \t\t\tpr_err(\"nest-imc: Unable to start the counters for node %d\\n\",\n \t\t\t\t\t\t\t\t\tnode_id);\n \t\t\treturn rc;\n","prefixes":["Artful","09/12"]}