From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on archive.lwn.net X-Spam-Level: X-Spam-Status: No, score=-5.7 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI,SPF_HELO_NONE,SPF_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by archive.lwn.net (Postfix) with ESMTP id 633847D90D for ; Mon, 28 Oct 2019 02:42:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729416AbfJ1CmZ (ORCPT ); Sun, 27 Oct 2019 22:42:25 -0400 Received: from 59-120-53-16.HINET-IP.hinet.net ([59.120.53.16]:59684 "EHLO ATCSQR.andestech.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728898AbfJ1CmY (ORCPT ); Sun, 27 Oct 2019 22:42:24 -0400 Received: from mail.andestech.com (atcpcs16.andestech.com [10.0.1.222]) by ATCSQR.andestech.com with ESMTP id x9S2O9tf087229; Mon, 28 Oct 2019 10:24:09 +0800 (GMT-8) (envelope-from nickhu@andestech.com) Received: from atcsqa06.andestech.com (10.0.15.65) by ATCPCS16.andestech.com (10.0.1.222) with Microsoft SMTP Server id 14.3.123.3; Mon, 28 Oct 2019 10:41:38 +0800 From: Nick Hu To: , , , , , , , , , , , , , , , , , CC: Nick Hu Subject: [PATCH v4 1/3] kasan: No KASAN's memmove check if archs don't have it. Date: Mon, 28 Oct 2019 10:40:59 +0800 Message-ID: <20191028024101.26655-2-nickhu@andestech.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20191028024101.26655-1-nickhu@andestech.com> References: <20191028024101.26655-1-nickhu@andestech.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.0.15.65] X-DNSRBL: X-MAIL: ATCSQR.andestech.com x9S2O9tf087229 Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org If archs don't have memmove then the C implementation from lib/string.c is used, and then it's instrumented by compiler. So there is no need to add KASAN's memmove to manual checks. Signed-off-by: Nick Hu --- mm/kasan/common.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/mm/kasan/common.c b/mm/kasan/common.c index 6814d6d6a023..897f9520bab3 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -107,6 +107,7 @@ void *memset(void *addr, int c, size_t len) return __memset(addr, c, len); } +#ifdef __HAVE_ARCH_MEMMOVE #undef memmove void *memmove(void *dest, const void *src, size_t len) { @@ -115,6 +116,7 @@ void *memmove(void *dest, const void *src, size_t len) return __memmove(dest, src, len); } +#endif #undef memcpy void *memcpy(void *dest, const void *src, size_t len) -- 2.17.0