From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-f199.google.com (mail-qt0-f199.google.com [209.85.216.199]) by kanga.kvack.org (Postfix) with ESMTP id C76DF6B0276 for ; Tue, 17 Jul 2018 09:50:37 -0400 (EDT) Received: by mail-qt0-f199.google.com with SMTP id d25-v6so746572qtp.10 for ; Tue, 17 Jul 2018 06:50:37 -0700 (PDT) Received: from mail-sor-f65.google.com (mail-sor-f65.google.com. [209.85.220.65]) by mx.google.com with SMTPS id t129-v6sor398007qkc.79.2018.07.17.06.50.37 for (Google Transport Security); Tue, 17 Jul 2018 06:50:37 -0700 (PDT) From: Ram Pai Subject: [PATCH v14 16/22] selftests/vm: fix an assertion in test_pkey_alloc_exhaust() Date: Tue, 17 Jul 2018 06:49:19 -0700 Message-Id: <1531835365-32387-17-git-send-email-linuxram@us.ibm.com> In-Reply-To: <1531835365-32387-1-git-send-email-linuxram@us.ibm.com> References: <1531835365-32387-1-git-send-email-linuxram@us.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: shuahkh@osg.samsung.com, linux-kselftest@vger.kernel.org Cc: mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, x86@kernel.org, linux-arch@vger.kernel.org, mingo@redhat.com, dave.hansen@intel.com, mhocko@kernel.org, bauerman@linux.vnet.ibm.com, linuxram@us.ibm.com, fweimer@redhat.com, msuchanek@suse.de, aneesh.kumar@linux.vnet.ibm.com The maximum number of keys that can be allocated has to take into consideration, that some keys are reserved by the architecture for specific purpose. Hence cannot be allocated. Fix the assertion in test_pkey_alloc_exhaust() cc: Dave Hansen cc: Florian Weimer Signed-off-by: Ram Pai --- tools/testing/selftests/vm/protection_keys.c | 12 ++++-------- 1 files changed, 4 insertions(+), 8 deletions(-) diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c index d27fa5e..67d841e 100644 --- a/tools/testing/selftests/vm/protection_keys.c +++ b/tools/testing/selftests/vm/protection_keys.c @@ -1171,15 +1171,11 @@ void test_pkey_alloc_exhaust(int *ptr, u16 pkey) pkey_assert(i < NR_PKEYS*2); /* - * There are 16 pkeys supported in hardware. Three are - * allocated by the time we get here: - * 1. The default key (0) - * 2. One possibly consumed by an execute-only mapping. - * 3. One allocated by the test code and passed in via - * 'pkey' to this function. - * Ensure that we can allocate at least another 13 (16-3). + * There are NR_PKEYS pkeys supported in hardware. arch_reserved_keys() + * are reserved. And one key is allocated by the test code and passed + * in via 'pkey' to this function. */ - pkey_assert(i >= NR_PKEYS-3); + pkey_assert(i >= (NR_PKEYS-arch_reserved_keys()-1)); for (i = 0; i < nr_allocated_pkeys; i++) { err = sys_pkey_free(allocated_pkeys[i]); -- 1.7.1