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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,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 7D891C433FF for ; Wed, 31 Jul 2019 20:38:56 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 2736220659 for ; Wed, 31 Jul 2019 20:38:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="DNxXWQWV"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=lca.pw header.i=@lca.pw header.b="ofZWWtS5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2736220659 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lca.pw Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-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=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To: References:List-Owner; bh=KncmaTmVc1Vv5CdwsIq9bZrsCt+F79xZxulusOrJNp8=; b=DNx XWQWVkKcI02mEic8en/WLhd/gwXhm8zo33MlUrph+icjzoEkjMzASUE7plYM0HgNtHfZiuYZMuvB3 Ethw2Q5q6Gyk8tZ6mt7UMx8QchXf7wtD/NzlRu3iKyubmSsOHqWriQmHgCuGIwOEyC4bnWboe1kqY lM47UE1MZke3ryJpBEAkSzYJJRY24YhRC1SXJPMlmLUz3jFVkxYlTR3YMptg/Nbs0Y1mcS/6cwr1H D5iU/E0U+JITOO4qRxM4g34A4XqAYKQOJ2NJsqgM4BTmcyVP2AN2MipTZifVoIFyeAEhrDxF4eOsE 9kNsBLxIo2jB0sf1nBgjd6R+nvBEKhA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hsvN9-0001iq-CB; Wed, 31 Jul 2019 20:38:55 +0000 Received: from mail-vs1-xe43.google.com ([2607:f8b0:4864:20::e43]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hsvMv-0001Ud-Q0 for linux-arm-kernel@lists.infradead.org; Wed, 31 Jul 2019 20:38:43 +0000 Received: by mail-vs1-xe43.google.com with SMTP id h28so47218302vsl.12 for ; Wed, 31 Jul 2019 13:38:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lca.pw; s=google; h=from:to:cc:subject:date:message-id; bh=L4Tl5485GNCbBNzPALyO9jFAKxSVUDo2VTt4y0HMbAc=; b=ofZWWtS5ZWqQtpc9yer1nhq6viqjcYncIAGy4woJNgEe24OrmcTyAuaPYbJud1ZPxS d8NxLYzD0QA/XYfFmCJ5vzqkytrW9aCNOZpa0YxpDMyG6HQvHi6W7s3tWQB3YgHd2ayz TRa1ga5Ghsnm7qCRWcXY9mXYD3b/NnkpGhgoKIc8UTiTy6tHKNAcpUdepziwSrv7yZJa EqAIbxsyZBOJhRkxvvRJI+OwkWzOYuvpQ9ZwRxE3WSuLxrHTSDZXDLu3TOeSFqbaGWYw c2wkGNBWMOYw8WiiboqENEhtuNH4/4u1g9oDjnDnhBUKgJUbq3j48HWJLXHf5KebtJ3y QL0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=L4Tl5485GNCbBNzPALyO9jFAKxSVUDo2VTt4y0HMbAc=; b=YxSSD18BPZvGQRy7gV6JOPXvqJP6TaY9Qh389Ff3riMnfzyvBAhNIC5UqMfFW085Xx MAnF/u9Pl1UJZDB7udkhkKf1kuFsRXWz+TTS45EWF9dmTlMipGhGLKKYB5iRgZ2alBZH ZkugqD0V+SuPt/eenD3hl8n0zkQANqXE+gsN9mQlrDKG7ivyg19TDHCEaklDkn6P/ozi EAOXgFIz++8TaWIdUzNR+NGRvwlLdL2PL6rJB+sefiitvEGYfTCWmZV71f4WS4IvaA+d aW1Y32l45EricrUYBnUzqnwiPs505pOaHeND36i5elj4UQFy9+7E8yPD6Iyk6qNgJGsM +9EA== X-Gm-Message-State: APjAAAX2mxbEd2tcZFf8VngIgXFopL9eGFdRSRjARfcv12ldc8P/EsJR +71ystUY7Hv/LBjioO9dtHdZyg== X-Google-Smtp-Source: APXvYqwtVnkE/nTu9d2ervMPefdplu+skmjsj9M8Fn84HuBzn/RmQ72eprdarhaEmYf1cGiaCI4ygA== X-Received: by 2002:a67:1281:: with SMTP id 123mr69227162vss.10.1564605520701; Wed, 31 Jul 2019 13:38:40 -0700 (PDT) Received: from qcai.nay.com (nat-pool-bos-t.redhat.com. [66.187.233.206]) by smtp.gmail.com with ESMTPSA id k7sm18697069vkk.48.2019.07.31.13.38.39 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 31 Jul 2019 13:38:40 -0700 (PDT) From: Qian Cai To: catalin.marinas@arm.com, will@kernel.org Subject: [PATCH] arm64/mm: fix variable 'tag' set but not used Date: Wed, 31 Jul 2019 16:38:18 -0400 Message-Id: <1564605498-17629-1-git-send-email-cai@lca.pw> X-Mailer: git-send-email 1.8.3.1 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190731_133841_839582_9098AC6A X-CRM114-Status: GOOD ( 10.56 ) 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: andreyknvl@google.com, Qian Cai , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org When CONFIG_KASAN_SW_TAGS=n, set_tag() is compiled away. GCC throws a warning, mm/kasan/common.c: In function '__kasan_kmalloc': mm/kasan/common.c:464:5: warning: variable 'tag' set but not used [-Wunused-but-set-variable] u8 tag = 0xff; ^~~ Fix it by making __tag_set() a static inline function. Signed-off-by: Qian Cai --- arch/arm64/include/asm/memory.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index b7ba75809751..9645b1340afe 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -210,7 +210,11 @@ static inline unsigned long kaslr_offset(void) #define __tag_reset(addr) untagged_addr(addr) #define __tag_get(addr) (__u8)((u64)(addr) >> 56) #else -#define __tag_set(addr, tag) (addr) +static inline const void *__tag_set(const void *addr, u8 tag) +{ + return addr; +} + #define __tag_reset(addr) (addr) #define __tag_get(addr) 0 #endif -- 1.8.3.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel