From patchwork Fri Jan 17 12:49:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sandipan Das X-Patchwork-Id: 11338919 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id BEA2A6C1 for ; Fri, 17 Jan 2020 12:50:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A50F02467A for ; Fri, 17 Jan 2020 12:50:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726778AbgAQMun (ORCPT ); Fri, 17 Jan 2020 07:50:43 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:60794 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726845AbgAQMun (ORCPT ); Fri, 17 Jan 2020 07:50:43 -0500 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 00HClHT3025602 for ; Fri, 17 Jan 2020 07:50:41 -0500 Received: from e06smtp02.uk.ibm.com (e06smtp02.uk.ibm.com [195.75.94.98]) by mx0b-001b2d01.pphosted.com with ESMTP id 2xk0qrvbf8-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Fri, 17 Jan 2020 07:50:41 -0500 Received: from localhost by e06smtp02.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Fri, 17 Jan 2020 12:50:38 -0000 Received: from b06avi18878370.portsmouth.uk.ibm.com (9.149.26.194) by e06smtp02.uk.ibm.com (192.168.101.132) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 17 Jan 2020 12:50:34 -0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 00HCoWQx43254030 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 17 Jan 2020 12:50:32 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7509D52054; Fri, 17 Jan 2020 12:50:32 +0000 (GMT) Received: from fir03.in.ibm.com (unknown [9.121.59.65]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 058025204E; Fri, 17 Jan 2020 12:50:29 +0000 (GMT) From: Sandipan Das To: shuah@kernel.org, linux-kselftest@vger.kernel.org Cc: linux-arch@vger.kernel.org, fweimer@redhat.com, dave.hansen@intel.com, x86@kernel.org, linuxram@us.ibm.com, mhocko@kernel.org, linux-mm@kvack.org, mingo@redhat.com, aneesh.kumar@linux.ibm.com, bauerman@linux.ibm.com, msuchanek@suse.de, mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v16 10/23] selftests/vm/pkeys: Fix alloc_random_pkey() to make it really random Date: Fri, 17 Jan 2020 18:19:49 +0530 X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-TM-AS-GCONF: 00 x-cbid: 20011712-0008-0000-0000-0000034A4C5D X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20011712-0009-0000-0000-00004A6AA911 Message-Id: X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-17_03:2020-01-16,2020-01-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 phishscore=0 malwarescore=0 bulkscore=0 lowpriorityscore=0 spamscore=0 mlxlogscore=925 priorityscore=1501 suspectscore=0 impostorscore=0 adultscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-2001170102 Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Ram Pai alloc_random_pkey() was allocating the same pkey every time. Not all pkeys were geting tested. This fixes it. cc: Dave Hansen cc: Florian Weimer Signed-off-by: Ram Pai Acked-by: Dave Hansen Signed-off-by: Sandipan Das --- tools/testing/selftests/vm/protection_keys.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c index e666b5d2aeeb..8a69866e92fe 100644 --- a/tools/testing/selftests/vm/protection_keys.c +++ b/tools/testing/selftests/vm/protection_keys.c @@ -24,6 +24,7 @@ #define _GNU_SOURCE #include #include +#include #include #include #include @@ -545,10 +546,10 @@ int alloc_random_pkey(void) int nr_alloced = 0; int random_index; memset(alloced_pkeys, 0, sizeof(alloced_pkeys)); + srand((unsigned int)time(NULL)); /* allocate every possible key and make a note of which ones we got */ max_nr_pkey_allocs = NR_PKEYS; - max_nr_pkey_allocs = 1; for (i = 0; i < max_nr_pkey_allocs; i++) { int new_pkey = alloc_pkey(); if (new_pkey < 0)