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=-12.6 required=3.0 tests=BAYES_00,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 29A7BC43461 for ; Mon, 7 Sep 2020 05:59:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id DBD8F21741 for ; Mon, 7 Sep 2020 05:59:32 +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="hEYF4PSl" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726341AbgIGF7a (ORCPT ); Mon, 7 Sep 2020 01:59:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49042 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726802AbgIGF6i (ORCPT ); Mon, 7 Sep 2020 01:58:38 -0400 Received: from casper.infradead.org (casper.infradead.org [IPv6:2001:8b0:10b:1236::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BCF0CC061756; Sun, 6 Sep 2020 22:58:34 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.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; bh=LZG506isFI0SSgZ6Zw+vMgWmYh0hewhmkGW4YKK3Ono=; b=hEYF4PSl9zeran7ag2rqjrqpS+ F5YHwGNHRtUS/Z2Jy9aT/DAniqZ1qGd8gaILOKip2LnfpJ6kCpY+MIDo0A15yM5WxzPKOVdDJL34G oE8EBQwCz4G+IKkBMhP4/mRP4MXhf2D2smtrEYKj08iYpqhmQlRGMZV9pXsr1Yl+Ng649ggawxTBp +HA2Nd09IHgmGMDBpn5zLsUDLH6GTwUQ9wB2LKQUI7TK7bYmgAADrm7kitmH7hb53jBlhFYnQGya7 dsKZQzhaFoxG6l9zVTDaNFfsu68KbENJX/9W82Z5FihOVKoQ83g0PrrgdmHTgoaktJZ8LAjuUv4e6 ffZQ6t1A==; Received: from [2001:4bb8:184:af1:e178:97b2:ac6b:4e16] (helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kFAAg-00035H-HT; Mon, 07 Sep 2020 05:58:30 +0000 From: Christoph Hellwig To: Paul Walmsley , Palmer Dabbelt , Arnd Bergmann , Alexander Viro Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org Subject: [PATCH 3/8] asm-generic: add nommu implementations of __{get,put}_kernel_nofault Date: Mon, 7 Sep 2020 07:58:20 +0200 Message-Id: <20200907055825.1917151-4-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200907055825.1917151-1-hch@lst.de> References: <20200907055825.1917151-1-hch@lst.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-arch-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arch@vger.kernel.org Add native implementations of __{get,put}_kernel_nofault using {get,put}_unaligned, just like the {get,put}_user implementations. Signed-off-by: Christoph Hellwig --- include/asm-generic/uaccess.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h index 6de5f524e9e631..b367f339be1a90 100644 --- a/include/asm-generic/uaccess.h +++ b/include/asm-generic/uaccess.h @@ -61,6 +61,22 @@ static inline int __put_user_fn(size_t size, void __user *to, void *from) } #define __put_user_fn(sz, u, k) __put_user_fn(sz, u, k) +#define __get_kernel_nofault(dst, src, type, err_label) \ +do { \ + *((type *)dst) = get_unaligned((type *)(src)); \ + if (0) /* make sure the label looks used to the compiler */ \ + goto err_label; \ +} while (0) + +#define __put_kernel_nofault(dst, src, type, err_label) \ +do { \ + put_unaligned(*((type *)src), (type *)(dst)); \ + if (0) /* make sure the label looks used to the compiler */ \ + goto err_label; \ +} while (0) + +#define HAVE_GET_KERNEL_NOFAULT 1 + static inline __must_check unsigned long raw_copy_from_user(void *to, const void __user * from, unsigned long n) { -- 2.28.0