From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DD791C28CC4 for ; Sat, 1 Jun 2019 07:50:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B712326E92 for ; Sat, 1 Jun 2019 07:50:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="hyjPcmLt" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726851AbfFAHuq (ORCPT ); Sat, 1 Jun 2019 03:50:46 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:50900 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726195AbfFAHup (ORCPT ); Sat, 1 Jun 2019 03:50:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From :Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help: List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=PtF6JlZd/BfV9Typ91IQ/A0fJXKPUUPSZdBpZtuTT7o=; b=hyjPcmLtpzsxZZqlvh75qKW2VE RoZyn2HMekrjZEzE40C041i52hpzuDfJwM9cPRPWwQv94nzemt2EtQDVo8FnM2sTEjfWULCnI4RpF 2erohWRZG7mJT0wIIuj+5YXhdN5c+UEHTV8RpEaE5ee+1/XHYJQkGPkDx5itNmZ8DNZ/IX0VCNnrG f6yXEMbuiDDcfLxwKhbCjeKq2CErUUmhFfeNIhe+YM71UCFFu7fh88Ofk8jVC9pra9GPmUb6HnPDY DL8V2wZ7t0fs4R8RcM+V7Fp1M0082VCLwHugE0FJCxBWvZ1WH4OKbhzAp8L5/ZAIw4saZVbzvvJv+ ti/0ydPg==; Received: from 217-76-161-89.static.highway.a1.net ([217.76.161.89] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.90_1 #2 (Red Hat Linux)) id 1hWymE-00077u-Jv; Sat, 01 Jun 2019 07:50:07 +0000 From: Christoph Hellwig To: Linus Torvalds , Paul Burton , James Hogan , Yoshinori Sato , Rich Felker , "David S. Miller" Cc: Nicholas Piggin , Khalid Aziz , Andrey Konovalov , Benjamin Herrenschmidt , Paul Mackerras , Michael Ellerman , linux-mips@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, x86@kernel.org, linux-kernel@vger.kernel.org, Catalin Marinas Subject: [PATCH 01/16] uaccess: add untagged_addr definition for other arches Date: Sat, 1 Jun 2019 09:49:44 +0200 Message-Id: <20190601074959.14036-2-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190601074959.14036-1-hch@lst.de> References: <20190601074959.14036-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-mips-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.org From: 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 Signed-off-by: Christoph Hellwig --- include/linux/mm.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index 0e8834ac32b7..949d43e9c0b6 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 -- 2.20.1