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=-8.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 0C938C38A2A for ; Fri, 8 May 2020 21:40:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C9CF42051A for ; Fri, 8 May 2020 21:40:52 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="ajfVEzn+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727774AbgEHVkw (ORCPT ); Fri, 8 May 2020 17:40:52 -0400 Received: from mout.gmx.net ([212.227.15.18]:33551 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726811AbgEHVkw (ORCPT ); Fri, 8 May 2020 17:40:52 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1588974040; bh=XJmya1y8SnT4hBUSXuXigAogkzQtp1rc1Z/Frb1VJLQ=; h=X-UI-Sender-Class:Subject:To:Cc:References:From:Date:In-Reply-To; b=ajfVEzn+zwtAE5OVl5TsC4IL/96ZzmKl/VbUT0ZYSWUl6cBfatf2+PWYt3tiDy6JH HaVY/NOMpSYcAWaL41L8Yhpkk2DWqrSeCfr80XEz4rcsCnd0V9AJ2FmtQD/7RNltzm 7gG5LMjBcS+wSiT/hffoIndgDK6YjtDalUzHDFZQ= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [192.168.20.60] ([92.116.155.246]) by mail.gmx.com (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MLR1V-1joyhX2ZiV-00IUyI; Fri, 08 May 2020 23:40:40 +0200 Subject: Re: [PATCH] parisc: use -fno-strict-aliasing for decompressor To: Arnd Bergmann , "James E.J. Bottomley" Cc: kbuild test robot , linux-parisc@vger.kernel.org, linux-kernel@vger.kernel.org References: <20200508093553.2742898-1-arnd@arndb.de> From: Helge Deller Autocrypt: addr=deller@gmx.de; keydata= mQINBF3Ia3MBEAD3nmWzMgQByYAWnb9cNqspnkb2GLVKzhoH2QD4eRpyDLA/3smlClbeKkWT HLnjgkbPFDmcmCz5V0Wv1mKYRClAHPCIBIJgyICqqUZo2qGmKstUx3pFAiztlXBANpRECgwJ r+8w6mkccOM9GhoPU0vMaD/UVJcJQzvrxVHO8EHS36aUkjKd6cOpdVbCt3qx8cEhCmaFEO6u CL+k5AZQoABbFQEBocZE1/lSYzaHkcHrjn4cQjc3CffXnUVYwlo8EYOtAHgMDC39s9a7S90L 69l6G73lYBD/Br5lnDPlG6dKfGFZZpQ1h8/x+Qz366Ojfq9MuuRJg7ZQpe6foiOtqwKym/zV dVvSdOOc5sHSpfwu5+BVAAyBd6hw4NddlAQUjHSRs3zJ9OfrEx2d3mIfXZ7+pMhZ7qX0Axlq Lq+B5cfLpzkPAgKn11tfXFxP+hcPHIts0bnDz4EEp+HraW+oRCH2m57Y9zhcJTOJaLw4YpTY GRUlF076vZ2Hz/xMEvIJddRGId7UXZgH9a32NDf+BUjWEZvFt1wFSW1r7zb7oGCwZMy2LI/G aHQv/N0NeFMd28z+deyxd0k1CGefHJuJcOJDVtcE1rGQ43aDhWSpXvXKDj42vFD2We6uIo9D 1VNre2+uAxFzqqf026H6cH8hin9Vnx7p3uq3Dka/Y/qmRFnKVQARAQABtBxIZWxnZSBEZWxs ZXIgPGRlbGxlckBnbXguZGU+iQJRBBMBCAA7AhsDBQsJCAcCBhUKCQgLAgQWAgMBAh4BAheA FiEERUSCKCzZENvvPSX4Pl89BKeiRgMFAl3J1zsCGQEACgkQPl89BKeiRgNK7xAAg6kJTPje uBm9PJTUxXaoaLJFXbYdSPfXhqX/BI9Xi2VzhwC2nSmizdFbeobQBTtRIz5LPhjk95t11q0s uP5htzNISPpwxiYZGKrNnXfcPlziI2bUtlz4ke34cLK6MIl1kbS0/kJBxhiXyvyTWk2JmkMi REjR84lCMAoJd1OM9XGFOg94BT5aLlEKFcld9qj7B4UFpma8RbRUpUWdo0omAEgrnhaKJwV8 qt0ULaF/kyP5qbI8iA2PAvIjq73dA4LNKdMFPG7Rw8yITQ1Vi0DlDgDT2RLvKxEQC0o3C6O4 iQq7qamsThLK0JSDRdLDnq6Phv+Yahd7sDMYuk3gIdoyczRkXzncWAYq7XTWl7nZYBVXG1D8 gkdclsnHzEKpTQIzn/rGyZshsjL4pxVUIpw/vdfx8oNRLKj7iduf11g2kFP71e9v2PP94ik3 Xi9oszP+fP770J0B8QM8w745BrcQm41SsILjArK+5mMHrYhM4ZFN7aipK3UXDNs3vjN+t0zi qErzlrxXtsX4J6nqjs/mF9frVkpv7OTAzj7pjFHv0Bu8pRm4AyW6Y5/H6jOup6nkJdP/AFDu 5ImdlA0jhr3iLk9s9WnjBUHyMYu+HD7qR3yhX6uWxg2oB2FWVMRLXbPEt2hRGq09rVQS7DBy dbZgPwou7pD8MTfQhGmDJFKm2ju5Ag0EXchrcwEQAOsDQjdtPeaRt8EP2pc8tG+g9eiiX9Sh rX87SLSeKF6uHpEJ3VbhafIU6A7hy7RcIJnQz0hEUdXjH774B8YD3JKnAtfAyuIU2/rOGa/v UN4BY6U6TVIOv9piVQByBthGQh4YHhePSKtPzK9Pv/6rd8H3IWnJK/dXiUDQllkedrENXrZp eLUjhyp94ooo9XqRl44YqlsrSUh+BzW7wqwfmu26UjmAzIZYVCPCq5IjD96QrhLf6naY6En3 ++tqCAWPkqKvWfRdXPOz4GK08uhcBp3jZHTVkcbo5qahVpv8Y8mzOvSIAxnIjb+cklVxjyY9 dVlrhfKiK5L+zA2fWUreVBqLs1SjfHm5OGuQ2qqzVcMYJGH/uisJn22VXB1c48yYyGv2HUN5 lC1JHQUV9734I5cczA2Gfo27nTHy3zANj4hy+s/q1adzvn7hMokU7OehwKrNXafFfwWVK3OG 1dSjWtgIv5KJi1XZk5TV6JlPZSqj4D8pUwIx3KSp0cD7xTEZATRfc47Yc+cyKcXG034tNEAc xZNTR1kMi9njdxc1wzM9T6pspTtA0vuD3ee94Dg+nDrH1As24uwfFLguiILPzpl0kLaPYYgB wumlL2nGcB6RVRRFMiAS5uOTEk+sJ/tRiQwO3K8vmaECaNJRfJC7weH+jww1Dzo0f1TP6rUa fTBRABEBAAGJAjYEGAEIACAWIQRFRIIoLNkQ2+89Jfg+Xz0Ep6JGAwUCXchrcwIbDAAKCRA+ Xz0Ep6JGAxtdEAC54NQMBwjUNqBNCMsh6WrwQwbg9tkJw718QHPw43gKFSxFIYzdBzD/YMPH l+2fFiefvmI4uNDjlyCITGSM+T6b8cA7YAKvZhzJyJSS7pRzsIKGjhk7zADL1+PJei9p9idy RbmFKo0dAL+ac0t/EZULHGPuIiavWLgwYLVoUEBwz86ZtEtVmDmEsj8ryWw75ZIarNDhV74s BdM2ffUJk3+vWe25BPcJiaZkTuFt+xt2CdbvpZv3IPrEkp9GAKof2hHdFCRKMtgxBo8Kao6p Ws/Vv68FusAi94ySuZT3fp1xGWWf5+1jX4ylC//w0Rj85QihTpA2MylORUNFvH0MRJx4mlFk XN6G+5jIIJhG46LUucQ28+VyEDNcGL3tarnkw8ngEhAbnvMJ2RTx8vGh7PssKaGzAUmNNZiG MB4mPKqvDZ02j1wp7vthQcOEg08z1+XHXb8ZZKST7yTVa5P89JymGE8CBGdQaAXnqYK3/yWf FwRDcGV6nxanxZGKEkSHHOm8jHwvQWvPP73pvuPBEPtKGLzbgd7OOcGZWtq2hNC6cRtsRdDx 4TAGMCz4j238m+2mdbdhRh3iBnWT5yPFfnv/2IjFAk+sdix1Mrr+LIDF++kiekeq0yUpDdc4 ExBy2xf6dd+tuFFBp3/VDN4U0UfG4QJ2fg19zE5Z8dS4jGIbLrgzBF3IbakWCSsGAQQB2kcP AQEHQNdEF2C6q5MwiI+3akqcRJWo5mN24V3vb3guRJHo8xbFiQKtBBgBCAAgFiEERUSCKCzZ ENvvPSX4Pl89BKeiRgMFAl3IbakCGwIAgQkQPl89BKeiRgN2IAQZFggAHRYhBLzpEj4a0p8H wEm73vcStRCiOg9fBQJdyG2pAAoJEPcStRCiOg9fto8A/3cti96iIyCLswnSntdzdYl72SjJ HnsUYypLPeKEXwCqAQDB69QCjXHPmQ/340v6jONRMH6eLuGOdIBx8D+oBp8+BGLiD/9qu5H/ eGe0rrmE5lLFRlnm5QqKKi4gKt2WHMEdGi7fXggOTZbuKJA9+DzPxcf9ShuQMJRQDkgzv/VD V1fvOdaIMlM1EjMxIS2fyyI+9KZD7WwFYK3VIOsC7PtjOLYHSr7o7vDHNqTle7JYGEPlxuE6 hjMU7Ew2Ni4SBio8PILVXE+dL/BELp5JzOcMPnOnVsQtNbllIYvXRyX0qkTD6XM2Jbh+xI9P xajC+ojJ/cqPYBEALVfgdh6MbA8rx3EOCYj/n8cZ/xfo+wR/zSQ+m9wIhjxI4XfbNz8oGECm xeg1uqcyxfHx+N/pdg5Rvw9g+rtlfmTCj8JhNksNr0NcsNXTkaOy++4Wb9lKDAUcRma7TgMk Yq21O5RINec5Jo3xeEUfApVwbueBWCtq4bljeXG93iOWMk4cYqsRVsWsDxsplHQfh5xHk2Zf GAUYbm/rX36cdDBbaX2+rgvcHDTx9fOXozugEqFQv9oNg3UnXDWyEeiDLTC/0Gei/Jd/YL1p XzCscCr+pggvqX7kI33AQsxo1DT19sNYLU5dJ5Qxz1+zdNkB9kK9CcTVFXMYehKueBkk5MaU ou0ZH9LCDjtnOKxPuUWstxTXWzsinSpLDIpkP//4fN6asmPo2cSXMXE0iA5WsWAXcK8uZ4jD c2TFWAS8k6RLkk41ZUU8ENX8+qZx/Q== Message-ID: <5849978b-7330-1dae-0896-7ecbc6083d34@gmx.de> Date: Fri, 8 May 2020 23:40:37 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200508093553.2742898-1-arnd@arndb.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:UGxuUXaGz7NpVCArGrRLq1hDnXA3xUz/E/hZufP40aiZUtJOkWN HKrtUYg9G5Ti4HDNj+wm8TRUpcTlhKSRcH3Dg12PPy7jej1y6rGT1zIDe2w8WChliEDjOu1 hVzEXg5svuZz14Ck9rY6a4AfSj1cZbxYFyi3EeuT0AKgCCYEbjAfufvprsG0aele8mViLon jK9SP2ICpoyu72jURiW1g== X-UI-Out-Filterresults: notjunk:1;V03:K0:vwuBalWZn4w=:nvPLEcsuviK4pyboNNdPrw Wc66mib7ze5EVSjnCdQuUq8Fcx+r8xLULhrMI19A86sVEcAq5M0eLSNOau6wXggSX5czIKd1D VKvBPu0JGYVC2Hlpg/8iUlZHy5qFgU59fjzvuFRexQ3AZlnw+CQoy0NW3VNn4/2DZFZHJA2Cx +v1aEKSpwhrunwETAhe2nkLm32X6DjVZg8EZRtgw0lYQ5yL3ubJ33lcgwNLk5/RAbRV5NumDZ JTR2C+JGP5rdvRtiJS8XKyaons98aqBb3avJLtbXCZakPT9TJeqT4rKpvi72KSOn37ZracSpi iuc0ZjpRqE091os2jTjSfrV3laiD6hBg3luPR1+RYUUlH9pr9qHdXXRtVkVg1u/+T+w4446LF U+TEhSz2nd+k4lEzw2oGGaBgIRHSaTPytcYWHBg9oxp3rIsTqxFobwZu6g3SvDevxlfIo2lQ2 xUyyqJ5tKdF89A32apAaNiO/OI9r8f3pmIQFKQZrbbg5VM8aOQvdA9vjV3CeN2MI7znL9fQnF Lx9Kdxsx88NqjgGgWWtJuZXXfm3TxYpJWKjvqebfeyu4MAop8EPaf5FrFCzp4l8ngsm+zSEQ7 HudfblVcW4alUm71ufLLitG7A8whNs5XQ2exINYbSm54Le0ooogpWMLwg/v+K5dbtK7FKn5v1 Ncb7UkXHuGPvywYDqNvhAYOn1F/bRvMQbLwZ2vFW4is2U0qWL3Rw3R+QDsMXHJVkA08GnLjRi dDZER5s2ysIx3jpizIyah4OVe9LK+Utn5BPiS9S70myXtwCrCB3OuNGchpDEWX4NSuG1s/pxz j5ORpXpgxZebKULgFBwEiiReXzZ70vaCQ3qRyhc+6WlnDrAme8yikc+zAOXZz9N3XXyIm4r0v zBxU+QdxJ3WT+z2atkro2IkHSIBjE/VBQdCNPUPPTROmD0fujlSYItWKVjOUJiFclU0+LLRDD gpFpucQGeljbgwfYVhzqk5Mlb8FhlTLtyORYr7UpNKDmythLW1p+f685wNQuv7FX5dU64DXCG UMg1SnwIkdDRhmIzSA7/kYD4AY/DdrtvWNNFoTgoj0NroE30X50O43gV7wfk6czb1nY3oB2cF 9wfQV3Ll2mycJlFJoH7e9yrYlMOkjql2IYVOC+PM6SxZdCPu9KzcgrpdsM/9xxkiYqzOHchHA cibcZKhb7AKPcFLcHPS6ceh8PsaEboKIicAgaxZBquRPXRiRw4Gw8bxl+Io/ps05fULAwatGe nRuXakZNiswcEsCuj Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org On 08.05.20 11:35, Arnd Bergmann wrote: > An experimental patch series of mine reworks how warnings are processed > in Kbuild. A side effect is a new warning about a harmless aliasing > rule violation in an inline function: > > In file included from > include/linux/rhashtable-types.h:15:0, > from include/linux/ipc.h:7, > from include/uapi/linux/sem.h:5, > from include/linux/sem.h:5, > from include/linux/sched.h:15, > from include/linux/uaccess.h:6, > from arch/parisc/boot/compressed/misc.c:7: > include/linux/workqueue.h: In function 'work_static': > include/linux/workqueue.h:212:2: warning: dereferencing > type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing] > return *work_data_bits(work) & WORK_STRUCT_STATIC; > > Make the decompressor use -fno-strict-aliasing like the rest of > the kernel for consistency, and to ensure this warning never makes > it into a release. > > Reported-by: kbuild test robot > Signed-off-by: Arnd Bergmann Acked-by: Helge Deller Arnd, will you take it through your trees when you push your experimental patches, or do you want me to take it through the parisc tree? Helge > --- > arch/parisc/boot/compressed/Makefile | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/arch/parisc/boot/compressed/Makefile b/arch/parisc/boot/com= pressed/Makefile > index 1e5879c6a752..dff453687530 100644 > --- a/arch/parisc/boot/compressed/Makefile > +++ b/arch/parisc/boot/compressed/Makefile > @@ -16,6 +16,7 @@ targets +=3D real2.S firmware.c > > KBUILD_CFLAGS :=3D -D__KERNEL__ -O2 -DBOOTLOADER > KBUILD_CFLAGS +=3D -DDISABLE_BRANCH_PROFILING > +KBUILD_CFLAGS +=3D -fno-strict-aliasing > KBUILD_CFLAGS +=3D $(cflags-y) -fno-delete-null-pointer-checks -fno-bui= ltin-printf > KBUILD_CFLAGS +=3D -fno-PIE -mno-space-regs -mdisable-fpregs -Os > ifndef CONFIG_64BIT >