Received: by 2002:a05:6a10:9848:0:0:0:0 with SMTP id x8csp4945pxf; Tue, 16 Mar 2021 20:08:56 -0700 (PDT) X-Google-Smtp-Source: ABdhPJzvy0m2K9asDVDi6VzMK4kPMaNSiEdZjWedSWKcZWIGxUuiquVcbFrU8VgLdiDpEaLld/yz X-Received: by 2002:a17:907:75d9:: with SMTP id jl25mr32425464ejc.452.1615950536454; Tue, 16 Mar 2021 20:08:56 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1615950536; cv=none; d=google.com; s=arc-20160816; b=jemWPaXqY+rFuOR98I2eTz2qdKazA2lNp39eYoTDrOzo//CeBlBFAqDNfftLwQX3Tw +m3NXw1kuBe060HuOWjWi8EJ8gtIr4hbFzTxOnsZqp4CP6ZsSs3zBFOsieUS+77sSW2x Ud9wzeGzN7ylZ/Xq2xstOgzBcwcqZore5/G0hpWkYAAh4TP9+ojF7fI40iFwWsUekcy/ AXbt1A4KSnYxJtDoh0y4GfJoVa2qtFSk59vddAio4TrG3E2IsC7OcwdcuhIGk9HHxrcm U7eOGujrEoGOPJW5d2rcwKFdONzaB1F6q2pJNnIY6zQfiSQu1P0PIHyRmlHMy4GC2gTg msuA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:mime-version:message-id:date:references :in-reply-to:subject:cc:to:from:dkim-signature; bh=ArISpaVR5NftLHA/UO2Rb3+d6mO7ozCvgCFkvz0VkaU=; b=maAPvksA49t9z6WQtq8QUUzBAYPTog5HgCb1IrRF9kvSwJI9KU0O3zJSkYadyWOU9A Z02KVhVoMDA9/1CXW3EYCq+mYcYpfV1kZp3zQsy+TksxQIiiYCzFQTtCH2+7ijTNnrEw mmsXkP8VfQ9Wb2w3+8YO//H/svu4peI2DSckcTmXMKP2IXcvD4VghDlTNA3ruCl0syVt X+xBr194DZm9bXppM45TRxTcnHpTfKef2BiqSqrRoAErt9/nTp82UrtK+d/Yxy2fZiz2 Nsh1CrRPy16V8EzYq4yTqQSFM1oAN9M8d+XLf7/is0b/2ExSwp4alW4xFoP5n7hOu3Of Jelw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@axtens.net header.s=google header.b=gB8Ihhzu; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id ay27si15246571edb.171.2021.03.16.20.08.33; Tue, 16 Mar 2021 20:08:56 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@axtens.net header.s=google header.b=gB8Ihhzu; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229487AbhCQDE4 (ORCPT + 99 others); Tue, 16 Mar 2021 23:04:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47136 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230064AbhCQDEi (ORCPT ); Tue, 16 Mar 2021 23:04:38 -0400 Received: from mail-pg1-x52b.google.com (mail-pg1-x52b.google.com [IPv6:2607:f8b0:4864:20::52b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0DE8AC06174A for ; Tue, 16 Mar 2021 20:04:38 -0700 (PDT) Received: by mail-pg1-x52b.google.com with SMTP id 205so6950607pgh.9 for ; Tue, 16 Mar 2021 20:04:38 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=axtens.net; s=google; h=from:to:cc:subject:in-reply-to:references:date:message-id :mime-version; bh=ArISpaVR5NftLHA/UO2Rb3+d6mO7ozCvgCFkvz0VkaU=; b=gB8IhhzuEXE0MWZPR8gGgSnLLxT40ijvLPcJjobBxTOh7v+wqAn/EtahpgVWj8EAMl 6cHsC/CpO9ttpUNdFm9uD7SudafgtprFotv94lVisWfSWYWv29hWuFCfRWkCLnp/UQGI GH7Awg0PrkcshDKjiJUutXKgvjDFHHHfMOyho= 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:in-reply-to:references:date :message-id:mime-version; bh=ArISpaVR5NftLHA/UO2Rb3+d6mO7ozCvgCFkvz0VkaU=; b=syOq8BbeklenbKx1fys1K8/sO3wW6QHFL/gaOE8dcUuBqHVojs4KjPnyCHuyzrv5bd 6TrOLZlBokQrqNG9kKUfD/PypoEGYAPCyzQ8DKZoALNW2SCsE6+0ucXEpAoTx5OxG6Yz ZnRQGZDZjQ1Dfj85W+Hv/O9YQSFIhvhF7OQe9P+JSYJvuj0nxrbPghGHFJkNyxX3nBeD 7ZuYOSts9n58R4kVsVPB9c0sUuL/xO+M9fpwNl7N4qe6c6CZf/kZiK8cDoFyVrP2vL4d O5SchU/uZqkbvdGH9r2asGn1zH+i71MRfWqRwgR9J4XUiRg0evy+/aj/BSolNV7EaUtv ocUg== X-Gm-Message-State: AOAM530rEg/BSQ4hEKeKs6aX3nEBuBfWJbQcxzIJopU0cNEQ8pC3Fk0L 0C/pVaj8FxDCBXKGvnsEbKrNIg== X-Received: by 2002:a65:4508:: with SMTP id n8mr745832pgq.294.1615950277599; Tue, 16 Mar 2021 20:04:37 -0700 (PDT) Received: from localhost (2001-44b8-1113-6700-b14c-f6f0-24fb-9b97.static.ipv6.internode.on.net. [2001:44b8:1113:6700:b14c:f6f0:24fb:9b97]) by smtp.gmail.com with ESMTPSA id z27sm16670536pff.111.2021.03.16.20.04.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Mar 2021 20:04:37 -0700 (PDT) From: Daniel Axtens To: He Ying , mpe@ellerman.id.au, benh@kernel.crashing.org, paulus@samba.org, npiggin@gmail.com, akpm@linux-foundation.org, aneesh.kumar@linux.ibm.com, rppt@kernel.org, ardb@kernel.org, clg@kaod.org, christophe.leroy@csgroup.eu Cc: johnny.chenyi@huawei.com, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] powerpc: arch/powerpc/kernel/setup_64.c - cleanup warnings In-Reply-To: <20210316041148.29694-1-heying24@huawei.com> References: <20210316041148.29694-1-heying24@huawei.com> Date: Wed, 17 Mar 2021 14:04:33 +1100 Message-ID: <87wnu6bhvi.fsf@dja-thinkpad.axtens.net> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi He Ying, Thank you for this patch. I'm not sure what the precise rules for Fixes are, but I wonder if this should have: Fixes: 9a32a7e78bd0 ("powerpc/64s: flush L1D after user accesses") Fixes: f79643787e0a ("powerpc/64s: flush L1D on kernel entry") Those are the commits that added the entry_flush and uaccess_flush symbols. Perhaps one for rfi_flush too but I'm not sure what commit introduced that. Kind regards, Daniel > warning: symbol 'rfi_flush' was not declared. > warning: symbol 'entry_flush' was not declared. > warning: symbol 'uaccess_flush' was not declared. > We found warnings above in arch/powerpc/kernel/setup_64.c by using > sparse tool. > > Define 'entry_flush' and 'uaccess_flush' as static because they are not > referenced outside the file. Include asm/security_features.h in which > 'rfi_flush' is declared. > > Reported-by: Hulk Robot > Signed-off-by: He Ying > --- > arch/powerpc/kernel/setup_64.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > > diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c > index 560ed8b975e7..f92d72a7e7ce 100644 > --- a/arch/powerpc/kernel/setup_64.c > +++ b/arch/powerpc/kernel/setup_64.c > @@ -68,6 +68,7 @@ > #include > #include > #include > +#include > > #include "setup.h" > > @@ -949,8 +950,8 @@ static bool no_rfi_flush; > static bool no_entry_flush; > static bool no_uaccess_flush; > bool rfi_flush; > -bool entry_flush; > -bool uaccess_flush; > +static bool entry_flush; > +static bool uaccess_flush; > DEFINE_STATIC_KEY_FALSE(uaccess_flush_key); > EXPORT_SYMBOL(uaccess_flush_key); > > -- > 2.17.1