From patchwork Tue Jun 25 14:37:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 11015749 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1B6611575 for ; Tue, 25 Jun 2019 14:38:54 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0E6D428640 for ; Tue, 25 Jun 2019 14:38:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0220C2863C; Tue, 25 Jun 2019 14:38:53 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AB7BD28640 for ; Tue, 25 Jun 2019 14:38:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731153AbfFYOhq (ORCPT ); Tue, 25 Jun 2019 10:37:46 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:52514 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731140AbfFYOhp (ORCPT ); Tue, 25 Jun 2019 10:37:45 -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=+0/viyEOzdJ4g+CLfsqZmoPceslPqx1tCvvAPI4dyzQ=; b=J5if1v3zcVM4I6x+2c5HtP4Bna 8Tefof1zgp+1eNhi7Lj/fWmEE2wW3rI8O4UbbH9ZXb6HT9QkCIwWaDfQ8VIjokPGOMCr4mTU7VKC3 BDJ9kTuu2kMvLojAus5QH/0IZbOaX5UCvmyn6bQTIZDkRfCnABq3kui54EXCrUdecIPX1UjtuoJvk Jb00yuChRKvnfiSIvznda80OjYZGtraH1c+tG4xnPe3aJsyDJn7b+bxmvddcgwCNaZFotzFXb39bC IB9Dsngi53dguMdFaTUTcWZoQBNLbeV9ShycGEu2VkmE3PeGt9vtNUcVnJ2h/JtVajilfZH+flpW0 eKQT/WWg==; Received: from 213-225-6-159.nat.highway.a1.net ([213.225.6.159] helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92 #3 (Red Hat Linux)) id 1hfmZU-0007xc-Qw; Tue, 25 Jun 2019 14:37:21 +0000 From: Christoph Hellwig To: Andrew Morton , 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, Jason Gunthorpe Subject: [PATCH 01/16] mm: use untagged_addr() for get_user_pages_fast addresses Date: Tue, 25 Jun 2019 16:37:00 +0200 Message-Id: <20190625143715.1689-2-hch@lst.de> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190625143715.1689-1-hch@lst.de> References: <20190625143715.1689-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This will allow sparc64, or any future architecture with memory tagging to override its tags for get_user_pages and get_user_pages_fast. Signed-off-by: Christoph Hellwig Reviewed-by: Khalid Aziz Reviewed-by: Jason Gunthorpe --- mm/gup.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/gup.c b/mm/gup.c index ddde097cf9e4..6bb521db67ec 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -2146,7 +2146,7 @@ int __get_user_pages_fast(unsigned long start, int nr_pages, int write, unsigned long flags; int nr = 0; - start &= PAGE_MASK; + start = untagged_addr(start) & PAGE_MASK; len = (unsigned long) nr_pages << PAGE_SHIFT; end = start + len; @@ -2219,7 +2219,7 @@ int get_user_pages_fast(unsigned long start, int nr_pages, unsigned long addr, len, end; int nr = 0, ret = 0; - start &= PAGE_MASK; + start = untagged_addr(start) & PAGE_MASK; addr = start; len = (unsigned long) nr_pages << PAGE_SHIFT; end = start + len;