From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qk0-f200.google.com (mail-qk0-f200.google.com [209.85.220.200]) by kanga.kvack.org (Postfix) with ESMTP id 11B026B066E for ; Sat, 15 Jul 2017 23:59:31 -0400 (EDT) Received: by mail-qk0-f200.google.com with SMTP id z22so59011366qka.4 for ; Sat, 15 Jul 2017 20:59:31 -0700 (PDT) Received: from mail-qk0-x243.google.com (mail-qk0-x243.google.com. [2607:f8b0:400d:c09::243]) by mx.google.com with ESMTPS id h63si11932170qkd.279.2017.07.15.20.59.30 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 15 Jul 2017 20:59:30 -0700 (PDT) Received: by mail-qk0-x243.google.com with SMTP id q66so17064383qki.1 for ; Sat, 15 Jul 2017 20:59:30 -0700 (PDT) From: Ram Pai Subject: [RFC v6 36/62] mm: introduce arch_pkeys_enabled() Date: Sat, 15 Jul 2017 20:56:38 -0700 Message-Id: <1500177424-13695-37-git-send-email-linuxram@us.ibm.com> In-Reply-To: <1500177424-13695-1-git-send-email-linuxram@us.ibm.com> References: <1500177424-13695-1-git-send-email-linuxram@us.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org Cc: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, khandual@linux.vnet.ibm.com, aneesh.kumar@linux.vnet.ibm.com, bsingharora@gmail.com, dave.hansen@intel.com, hbabu@us.ibm.com, linuxram@us.ibm.com, arnd@arndb.de, akpm@linux-foundation.org, corbet@lwn.net, mingo@redhat.com, mhocko@kernel.org Only the architecture knows if it supports protection keys. Hence introducing arch_pkeys_enabled(). This function is needed by arch neutral code. One use case is -- to determine if the protection key needs to be displayed in smaps. Signed-off-by: Ram Pai --- include/linux/pkeys.h | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/include/linux/pkeys.h b/include/linux/pkeys.h index a1bacf1..d120810 100644 --- a/include/linux/pkeys.h +++ b/include/linux/pkeys.h @@ -34,6 +34,11 @@ static inline int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, return 0; } +static inline bool arch_pkeys_enabled(void) +{ + return false; +} + static inline void copy_init_pkru_to_fpregs(void) { } -- 1.7.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org