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=-10.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 20D03C433DB for ; Fri, 12 Feb 2021 10:56:09 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C824764E35 for ; Fri, 12 Feb 2021 10:56:08 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C824764E35 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References:Message-ID: Subject:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=AKZFpGn6PFmooNXm3ivRAY1ZeLtndzkamHMHZyw3MUo=; b=aTNBas/AzWxdN3lAQTDenWBW9 1H7y3RbK7F4DXVcDxIZJh7gwr89IUSMw4E4akqiDbrTgd48mzEs1tnFiMCPzX/UOJK1TWD9WPaaNQ ES7Owd4KUF4I+ufg+GNCBrEki6aD66hzMTdd8j8fzCO3orOO/qf76PW1pKlp1mpjeL+Znj2/rqJ9A KEU3zqTIkHCI4t3oWyB4UBBqjRQd0oxETGuE1kyF//5vHXaZQboxVIKJFYDaWLkIaJ10OUfeSZDVk 8+2W0K2mdr1Yw+jNUTTd1rb+xbqd0+cSRxRMyWFsLmPVUePxiBQgflSgZtUlJMA5TWJXg5zJVS+uQ rIUEcDwJw==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1lAW6M-0004pX-3w; Fri, 12 Feb 2021 10:55:06 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1lAW6J-0004p8-KF for linux-arm-kernel@lists.infradead.org; Fri, 12 Feb 2021 10:55:04 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id AA47D64E35; Fri, 12 Feb 2021 10:55:01 +0000 (UTC) Date: Fri, 12 Feb 2021 10:54:59 +0000 From: Catalin Marinas To: Vincenzo Frascino Subject: Re: [PATCH v2] arm64: Fix warning in mte_get_random_tag() Message-ID: <20210212105458.GA7718@arm.com> References: <20210211152208.23811-1-vincenzo.frascino@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20210211152208.23811-1-vincenzo.frascino@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210212_055503_749176_E539CE1C X-CRM114-Status: GOOD ( 11.42 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Andrey Konovalov , linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Andrew Morton , Will Deacon , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gVGh1LCBGZWIgMTEsIDIwMjEgYXQgMDM6MjI6MDhQTSArMDAwMCwgVmluY2Vuem8gRnJhc2Np bm8gd3JvdGU6Cj4gVGhlIHNpbXBsaWZpY2F0aW9uIG9mIG10ZV9nZXRfcmFuZG9tX3RhZygpIGNh dXNlZCB0aGUgaW50cm9kdWN0aW9uIG9mIHRoZQo+IHdhcm5pbmcgYmVsb3c6Cj4gCj4gSW4gZmls ZSBpbmNsdWRlZCBmcm9tIGFyY2gvYXJtNjQvaW5jbHVkZS9hc20va2FzYW4uaDo5LAo+ICAgICAg ICAgICAgICAgICAgZnJvbSBpbmNsdWRlL2xpbnV4L2thc2FuLmg6MTYsCj4gICAgICAgICAgICAg ICAgICBmcm9tIG1tL2thc2FuL2NvbW1vbi5jOjE0Ogo+IG1tL2thc2FuL2NvbW1vbi5jOiBJbiBm dW5jdGlvbiDigJhtdGVfZ2V0X3JhbmRvbV90YWfigJk6Cj4gYXJjaC9hcm02NC9pbmNsdWRlL2Fz bS9tdGUta2FzYW4uaDo0NTo5OiB3YXJuaW5nOiDigJhhZGRy4oCZIGlzIHVzZWQKPiAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIHVuaW5pdGlhbGl6ZWQgWy1XdW5pbml0 aWFsaXplZF0KPiAgICA0NSB8ICAgICAgICAgYXNtKF9fTVRFX1BSRUFNQkxFICJpcmcgJTAsICUw Igo+ICAgICAgIHwKPiAKPiBGaXggdGhlIHdhcm5pbmcgdXNpbmcgIj1yIiBmb3IgdGhlIGFkZHJl c3MgaW4gdGhlIGFzbSBpbmxpbmUuCj4gCj4gRml4ZXM6IGM4ZjhkZTRjMDg4NyAoImFybTY0OiBr YXNhbjogc2ltcGxpZnkgYW5kIGlubGluZSBNVEUgZnVuY3Rpb25zIikKPiBDYzogQ2F0YWxpbiBN YXJpbmFzIDxjYXRhbGluLm1hcmluYXNAYXJtLmNvbT4KPiBDYzogV2lsbCBEZWFjb24gPHdpbGxA a2VybmVsLm9yZz4KPiBDYzogQW5kcmV5IEtvbm92YWxvdiA8YW5kcmV5a252bEBnb29nbGUuY29t Pgo+IENjOiBBbmRyZXcgTW9ydG9uIDxha3BtQGxpbnV4LWZvdW5kYXRpb24ub3JnPgo+IFNpZ25l ZC1vZmYtYnk6IFZpbmNlbnpvIEZyYXNjaW5vIDx2aW5jZW56by5mcmFzY2lub0Bhcm0uY29tPgoK QWNrZWQtYnk6IENhdGFsaW4gTWFyaW5hcyA8Y2F0YWxpbi5tYXJpbmFzQGFybS5jb20+CgpfX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1hcm0ta2Vy bmVsIG1haWxpbmcgbGlzdApsaW51eC1hcm0ta2VybmVsQGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0 cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9saW51eC1hcm0ta2VybmVs Cg== 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=-10.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 04CDAC433DB for ; Fri, 12 Feb 2021 10:55:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CBA8264E6B for ; Fri, 12 Feb 2021 10:55:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230373AbhBLKzw (ORCPT ); Fri, 12 Feb 2021 05:55:52 -0500 Received: from mail.kernel.org ([198.145.29.99]:57076 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229653AbhBLKzn (ORCPT ); Fri, 12 Feb 2021 05:55:43 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id AA47D64E35; Fri, 12 Feb 2021 10:55:01 +0000 (UTC) Date: Fri, 12 Feb 2021 10:54:59 +0000 From: Catalin Marinas To: Vincenzo Frascino Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Will Deacon , Andrey Konovalov , Andrew Morton Subject: Re: [PATCH v2] arm64: Fix warning in mte_get_random_tag() Message-ID: <20210212105458.GA7718@arm.com> References: <20210211152208.23811-1-vincenzo.frascino@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20210211152208.23811-1-vincenzo.frascino@arm.com> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Feb 11, 2021 at 03:22:08PM +0000, Vincenzo Frascino wrote: > The simplification of mte_get_random_tag() caused the introduction of the > warning below: > > In file included from arch/arm64/include/asm/kasan.h:9, > from include/linux/kasan.h:16, > from mm/kasan/common.c:14: > mm/kasan/common.c: In function ‘mte_get_random_tag’: > arch/arm64/include/asm/mte-kasan.h:45:9: warning: ‘addr’ is used > uninitialized [-Wuninitialized] > 45 | asm(__MTE_PREAMBLE "irg %0, %0" > | > > Fix the warning using "=r" for the address in the asm inline. > > Fixes: c8f8de4c0887 ("arm64: kasan: simplify and inline MTE functions") > Cc: Catalin Marinas > Cc: Will Deacon > Cc: Andrey Konovalov > Cc: Andrew Morton > Signed-off-by: Vincenzo Frascino Acked-by: Catalin Marinas