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 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 22E1BC0015E for ; Thu, 13 Jul 2023 10:16:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc: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=I5aIDr0XHM6H3n84b3UTbv9J9NTlZxmK2XUUZ2xhVog=; b=JXuaCyjLEoNVJe YJlXXYYkooFxwgfURqxWvx14cDjudCuwgeROpKYNs73wXaOXBxHXjo9v1wONEGX0Is48+myCOFOYe 56oVuX9lrebEc0eS1OzRKzeQDVqCWBzxnuT23Kvb9V0O2FdkfjZSPwzRxsTAWqhZSrekO454KNE7x QbfGWf71/NKy2TMP/x9sR7ivs0hU6qSywX/qzxxwlxh4MBB2uxKOU/I8GE0bfC9sk1MB3JuoCd0ce uNC6idgBrZ/gEoxi7zp1U5LRwv59fg2o5Bg8EabfeRigPczrB8ibLFdBtDjB8ofohzjWru2BMjSr7 f9atHgPZQg0fx/OkXGlQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qJtN3-002mks-0k; Thu, 13 Jul 2023 10:16:25 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qJtMz-002mjk-38 for linux-arm-kernel@lists.infradead.org; Thu, 13 Jul 2023 10:16:23 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding: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=UXKb8ReKi6vjKGSullcaPdOC0k6TBghM4uyawRsMGf0=; b=MPR7gAXtNr5fuBgqu+/UmCcQtu w0XvQvZRF+PO9lNSCvZMkZw/BypcOkHFC+l/CB7oDPzbnwJbOoPOixNtLZ8ep2rIiAkCdIMQFNULW fY2GkDfHBdb5N72KIhcyPYrZp1i9K2Ep6ju6KQyADiRL5IVJyhobf5BcdZfL7Huuf2W533vAyIiWC zvoJLufT3ij6FcUlJew07+L2W6kEZDC/9aGQwQIAMxudLBsa5viLr3yK5sC1hU5gIgNsAXvhRjhF8 Ps3FFXU6KuSuFWAxefd1/bQzcr4+5UxkePVyL3GkVwybAdw83P1fZNlJRtuaQp7UiqGuydAqXK38q P8aEXmhQ==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:57662) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1qJtMy-0006SO-1L; Thu, 13 Jul 2023 11:16:20 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1qJtMy-00064D-9g; Thu, 13 Jul 2023 11:16:20 +0100 Date: Thu, 13 Jul 2023 11:16:20 +0100 From: "Russell King (Oracle)" To: hanyu001@208suo.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: Fwd: [PATCH] arm: mm: replace snprintf in show functions with sysfs_emit Message-ID: References: <72204230a061f7d5bf19f09d524203ce@208suo.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <72204230a061f7d5bf19f09d524203ce@208suo.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230713_031622_006878_F5191047 X-CRM114-Status: GOOD ( 16.14 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Jul 13, 2023 at 06:06:15PM +0800, hanyu001@208suo.com wrote: > coccicheck complains about the use of snprintf() in sysfs show functions. > > Fix the coccicheck warning: > WARNING: use scnprintf or sprintf. > > ./arch/arm/mm/cache-l2x0-pmu.c:346:8-16: WARNING: use scnprintf or sprintf > > Signed-off-by: ztt <1549089851@qq.com> > --- > arch/arm/mm/cache-l2x0-pmu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm/mm/cache-l2x0-pmu.c b/arch/arm/mm/cache-l2x0-pmu.c > index 993fefdc167a..d20626451a2e 100644 > --- a/arch/arm/mm/cache-l2x0-pmu.c > +++ b/arch/arm/mm/cache-l2x0-pmu.c > @@ -343,7 +343,7 @@ static ssize_t l2x0_pmu_event_show(struct device *dev, > struct l2x0_event_attribute *lattr; > > lattr = container_of(attr, typeof(*lattr), attr); > - return snprintf(buf, PAGE_SIZE, "config=0x%x\n", lattr->config); > + return scnprintf(buf, PAGE_SIZE, "config=0x%x\n", lattr->config); This only serves to shut up a warning. On 32-bit ARM, there is utterly no way what so ever that "config=0x%x\n" could ever overflow 4096 bytes, or even 32 bytes! -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel 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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2D67EEB64DD for ; Thu, 13 Jul 2023 10:17:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231891AbjGMKRL (ORCPT ); Thu, 13 Jul 2023 06:17:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57378 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233797AbjGMKQj (ORCPT ); Thu, 13 Jul 2023 06:16:39 -0400 Received: from pandora.armlinux.org.uk (pandora.armlinux.org.uk [IPv6:2001:4d48:ad52:32c8:5054:ff:fe00:142]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2F63F270F for ; Thu, 13 Jul 2023 03:16:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding: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=UXKb8ReKi6vjKGSullcaPdOC0k6TBghM4uyawRsMGf0=; b=MPR7gAXtNr5fuBgqu+/UmCcQtu w0XvQvZRF+PO9lNSCvZMkZw/BypcOkHFC+l/CB7oDPzbnwJbOoPOixNtLZ8ep2rIiAkCdIMQFNULW fY2GkDfHBdb5N72KIhcyPYrZp1i9K2Ep6ju6KQyADiRL5IVJyhobf5BcdZfL7Huuf2W533vAyIiWC zvoJLufT3ij6FcUlJew07+L2W6kEZDC/9aGQwQIAMxudLBsa5viLr3yK5sC1hU5gIgNsAXvhRjhF8 Ps3FFXU6KuSuFWAxefd1/bQzcr4+5UxkePVyL3GkVwybAdw83P1fZNlJRtuaQp7UiqGuydAqXK38q P8aEXmhQ==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:57662) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1qJtMy-0006SO-1L; Thu, 13 Jul 2023 11:16:20 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1qJtMy-00064D-9g; Thu, 13 Jul 2023 11:16:20 +0100 Date: Thu, 13 Jul 2023 11:16:20 +0100 From: "Russell King (Oracle)" To: hanyu001@208suo.com Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: Fwd: [PATCH] arm: mm: replace snprintf in show functions with sysfs_emit Message-ID: References: <72204230a061f7d5bf19f09d524203ce@208suo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <72204230a061f7d5bf19f09d524203ce@208suo.com> Sender: Russell King (Oracle) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Jul 13, 2023 at 06:06:15PM +0800, hanyu001@208suo.com wrote: > coccicheck complains about the use of snprintf() in sysfs show functions. > > Fix the coccicheck warning: > WARNING: use scnprintf or sprintf. > > ./arch/arm/mm/cache-l2x0-pmu.c:346:8-16: WARNING: use scnprintf or sprintf > > Signed-off-by: ztt <1549089851@qq.com> > --- > arch/arm/mm/cache-l2x0-pmu.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm/mm/cache-l2x0-pmu.c b/arch/arm/mm/cache-l2x0-pmu.c > index 993fefdc167a..d20626451a2e 100644 > --- a/arch/arm/mm/cache-l2x0-pmu.c > +++ b/arch/arm/mm/cache-l2x0-pmu.c > @@ -343,7 +343,7 @@ static ssize_t l2x0_pmu_event_show(struct device *dev, > struct l2x0_event_attribute *lattr; > > lattr = container_of(attr, typeof(*lattr), attr); > - return snprintf(buf, PAGE_SIZE, "config=0x%x\n", lattr->config); > + return scnprintf(buf, PAGE_SIZE, "config=0x%x\n", lattr->config); This only serves to shut up a warning. On 32-bit ARM, there is utterly no way what so ever that "config=0x%x\n" could ever overflow 4096 bytes, or even 32 bytes! -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!