From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-vk1-f201.google.com ([209.85.221.201]:38757 "EHLO mail-vk1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725966AbfCTOvr (ORCPT ); Wed, 20 Mar 2019 10:51:47 -0400 Received: by mail-vk1-f201.google.com with SMTP id u20so1053378vku.5 for ; Wed, 20 Mar 2019 07:51:46 -0700 (PDT) Date: Wed, 20 Mar 2019 15:51:15 +0100 In-Reply-To: Message-Id: <7747d94301bcb30de0026e9434a1e1879f84aae7.1553093421.git.andreyknvl@google.com> Mime-Version: 1.0 References: Subject: [PATCH v13 01/20] uaccess: add untagged_addr definition for other arches From: Andrey Konovalov Content-Type: text/plain; charset="UTF-8" Sender: linux-arch-owner@vger.kernel.org List-ID: To: Catalin Marinas , Will Deacon , Mark Rutland , Robin Murphy , Kees Cook , Kate Stewart , Greg Kroah-Hartman , Andrew Morton , Ingo Molnar , "Kirill A . Shutemov" , Shuah Khan , Vincenzo Frascino , Eric Dumazet , "David S. Miller" , Alexei Starovoitov , Daniel Borkmann , Steven Rostedt , Ingo Molnar , Peter Zijlstra , Arnaldo Carvalho de Melo , Alex Deucher , =?UTF-8?q?Christian=20K=C3=B6nig?= , "David (ChunMing) Zhou" , Yishai Hadas , Mauro Carvalho Chehab , Jens Wiklander , Alex Williamson , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, netdev@vger.kernel.org, bpf@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-rdma@vger.kernel.org, linux-media@vger.kernel.org, kvm@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 , Luc Van Oostenryck , Dave Martin , Kevin Brodsky , Szabolcs Nagy , Andrey Konovalov To allow arm64 syscalls to 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, the untagged_addr macro needs to be defined for all architectures. Define it as a noop for architectures other than arm64. Acked-by: Catalin Marinas Signed-off-by: Andrey Konovalov --- include/linux/mm.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 76769749b5a5..4d674518d392 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -99,6 +99,10 @@ extern int mmap_rnd_compat_bits __read_mostly; #include #include +#ifndef untagged_addr +#define untagged_addr(addr) (addr) +#endif + #ifndef __pa_symbol #define __pa_symbol(x) __pa(RELOC_HIDE((unsigned long)(x), 0)) #endif -- 2.21.0.225.g810b269d1ac-goog