From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-f71.google.com (mail-wm0-f71.google.com [74.125.82.71]) by kanga.kvack.org (Postfix) with ESMTP id 4AB036B0007 for ; Wed, 20 Jun 2018 11:24:34 -0400 (EDT) Received: by mail-wm0-f71.google.com with SMTP id v13-v6so66160wmc.1 for ; Wed, 20 Jun 2018 08:24:34 -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 k1-v6sor1391828wrp.87.2018.06.20.08.24.33 for (Google Transport Security); Wed, 20 Jun 2018 08:24:33 -0700 (PDT) From: Andrey Konovalov Subject: [PATCH v4 2/7] uaccess: add untagged_addr definition for other arches Date: Wed, 20 Jun 2018 17:24:21 +0200 Message-Id: In-Reply-To: References: Sender: owner-linux-mm@kvack.org List-ID: To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , Al Viro , Andrey Konovalov , Kees Cook , Kate Stewart , Greg Kroah-Hartman , Andrew Morton , Ingo Molnar , "Kirill A . Shutemov" , Shuah Khan , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Dmitry Vyukov , Kostya Serebryany , Evgeniy Stepanov , Lee Smith , Ramana Radhakrishnan , Jacob Bramley , Ruben Ayrapetyan , Chintan Pandya To allow arm64 syscalls accept tagged pointers from userspace, we must untag them when they are passed to the kernel. Since untagging is done in generic parts of the kernel (like the mm subsystem), the untagged_addr macro should be defined for all architectures. Define it as a noop for other architectures besides arm64. Signed-off-by: Andrey Konovalov --- include/linux/uaccess.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/uaccess.h b/include/linux/uaccess.h index efe79c1cdd47..c045b4eff95e 100644 --- a/include/linux/uaccess.h +++ b/include/linux/uaccess.h @@ -13,6 +13,10 @@ #include +#ifndef untagged_addr +#define untagged_addr(addr) addr +#endif + /* * Architectures should provide two primitives (raw_copy_{to,from}_user()) * and get rid of their private instances of copy_{to,from}_user() and -- 2.18.0.rc1.244.gcf134e6275-goog