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Wed, 15 Jul 2020 16:37:15 +0200 Received: from p57bd93f9.dip0.t-ipconnect.de ([87.189.147.249] helo=[192.168.178.139]) by inpost2.zedat.fu-berlin.de (Exim 4.93) with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (envelope-from ) id 1jviX5-002GxL-7D; Wed, 15 Jul 2020 16:37:15 +0200 Subject: Re: ioremap and dma cleanups and fixes for superh (2nd resend) From: John Paul Adrian Glaubitz To: Geert Uytterhoeven Cc: Rich Felker , Christoph Hellwig , Yoshinori Sato , Linux-sh list , Linux Kernel Mailing List References: <20200714121856.955680-1-hch@lst.de> <20200714155914.GA24404@brightrain.aerifal.cx> <8cbf2963-d0e4-0ca8-4ffe-c2057694447f@physik.fu-berlin.de> <011f29e6-ad71-366e-dbff-bc8471f3da60@physik.fu-berlin.de> Autocrypt: addr=glaubitz@physik.fu-berlin.de; keydata= mQINBE3JE9wBEADMrYGNfz3oz6XLw9XcWvuIxIlPWoTyw9BxTicfGAv0d87wngs9U+d52t/R EggPePf34gb7/k8FBY1IgyxnZEB5NxUb1WtW0M3GUxpPx6gBZqOm7SK1ZW3oSORw+T7Aezl3 Zq4Nr4Nptqx7fnLpXfRDs5iYO/GX8WuL8fkGS/gIXtxKewd0LkTlb6jq9KKq8qn8/BN5YEKq JlM7jsENyA5PIe2npN3MjEg6p+qFrmrzJRuFjjdf5vvGfzskrXCAKGlNjMMA4TgZvugOFmBI /iSyV0IOaj0uKhes0ZNX+lQFrOB4j6I5fTBy7L/T3W/pCWo3wVkknNYa8TDYT73oIZ7Aimv+ k7OzRfnxsSOAZT8Re1Yt8mvzr6FHVFjr/VdyTtO5JgQZ6LEmvo4Ro+2ByBmCHORCQ0NJhD1U 3avjGfvfslG999W0WEZLTeaGkBAN1yG/1bgGAytQQkD9NsVXqBy7S3LVv9bB844ysW5Aj1nv tgIz14E2WL8rbpfjJMXi7B5ha6Lxf3rFOgxpr6ZoEn+bGG4hmrO+/ReA4SerfMqwSTnjZsZv xMJsx2B9c8DaZE8GsA4I6lsihbJmXhw8i7Cta8Dx418wtEbXhL6m/UEk60O7QD1VBgGqDMnJ DFSlvKa9D+tZde/kHSNmQmLLzxtDbNgBgmR0jUlmxirijnm8bwARAQABtFRKb2huIFBhdWwg QWRyaWFuIEdsYXViaXR6IChGcmVpZSBVbml2ZXJzaXRhZXQgQmVybGluKSA8Z2xhdWJpdHpA cGh5c2lrLmZ1LWJlcmxpbi5kZT6JAlEEEwEIADsCGwMFCwkIBwMFFQoJCAsFFgIDAQACHgEC F4AWIQRi/4p1hOApVpVGAAZ0Jjs39bX5EwUCWhQoUgIZAQAKCRB0Jjs39bX5Ez/ID/98r9c4 WUSgOHVPSMVcOVziMOi+zPWfF1OhOXW+atpTM4LSSp66196xOlDFHOdNNmO6kxckXAX9ptvp Bc0mRxa7OrC168fKzqR7P75eTsJnVaOu+uI/vvgsbUIosYdkkekCxDAbYCUwmzNotIspnFbx iSPMNrpw7Ud/yQkS9TDYeXnrZDhBp7p5+naWCD/yMvh7yVCA4Ea8+xDVoX+kjv6EHJrwVupO pMa39cGs2rKYZbWTazcflKH+bXG3FHBrwh9XRjA6A1CTeC/zTVNgGF6wvw/qT2x9tS7WeeZ1 jvBCJub2cb07qIfuvxXiGcYGr+W4z9GuLCiWsMmoff/Gmo1aeMZDRYKLAZLGlEr6zkYh1Abt iz0YLqIYVbZAnf8dCjmYhuwPq77IeqSjqUqI2Cb0oOOlwRKVWDlqAeo0Bh8DrvZvBAojJf4H nQZ/pSz0yaRed/0FAmkVfV+1yR6BtRXhkRF6NCmguSITC96IzE26C6n5DBb43MR7Ga/mof4M UufnKADNG4qz57CBwENHyx6ftWJeWZNdRZq10o0NXuCJZf/iulHCWS/hFOM5ygfONq1Vsj2Z DSWvVpSLj+Ufd2QnmsnrCr1ZGcl72OC24AmqFWJY+IyReHWpuABEVZVeVDQooJ0K4yqucmrF R7HyH7oZGgR0CgYHCI+9yhrXHrQpyLkCDQRNyRQuARAArCaWhVbMXw9iHmMH0BN/TuSmeKtV h/+QOT5C5Uw+XJ3A+OHr9rB+SpndJEcDIhv70gLrpEuloXhZI9VYazfTv6lrkCZObXq/NgDQ Mnu+9E/E/PE9irqnZZOMWpurQRh41MibRii0iSr+AH2IhRL6CN2egZID6f93Cdu7US53ZqIx bXoguqGB2CK115bcnsswMW9YiVegFA5J9dAMsCI9/6M8li+CSYICi9gq0LdpODdsVfaxmo4+ xYFdXoDN33b8Yyzhbh/I5gtVIRpfL+Yjfk8xAsfz78wzifSDckSB3NGPAXvs6HxKc50bvf+P 6t2tLpmB/KrpozlZazq16iktY97QulyEY9JWCiEgDs6EKb4wTx+lUe4yS9eo95cBV+YlL+BX kJSAMyxgSOy35BeBaeUSIrYqfHpbNn6/nidwDhg/nxyJs8mPlBvHiCLwotje2AhtYndDEhGQ KEtEaMQEhDi9MsCGHe+00QegCv3FRveHwzGphY1YlRItLjF4TcFz1SsHn30e7uLTDe/pUMZU Kd1xU73WWr0NlWG1g49ITyaBpwdv/cs/RQ5laYYeivnag81TcPCDbTm7zXiwo53aLQOZj4u3 gSQvAUhgYTQUstMdkOMOn0PSIpyVAq3zrEFEYf7bNSTcdGrgwCuCBe4DgI3Vu4LOoAeI428t 2dj1K1EAEQEAAYkCHwQYAQgACQUCTckULgIbDAAKCRB0Jjs39bX5E683EAC1huywL4BlxTj7 FTm7FiKd5/KEH5/oaxLQN26mn8yRkP/L3xwiqXxdd0hnrPyUe8mUOrSg7KLMul+pSRxPgaHA xt1I1hQZ30cJ1j/SkDIV2ImSf75Yzz5v72fPiYLq9+H3qKZwrgof9yM/s0bfsSX/GWyFatvo Koo+TgrE0rmtQw82vv7/cbDAYceQm1bRB8Nr8agPyGXYcjohAj7NJcra4hnu1wUw3yD05p/B Rntv7NvPWV3Oo7DKCWIS4RpEd6I6E+tN3GCePqROeK1nDv+FJWLkyvwLigfNaCLro6/292YK VMdBISNYN4s6IGPrXGGvoDwo9RVo6kBhlYEfg6+2eaPCwq40IVfKbYNwLLB2MR2ssL4yzmDo OR3rQFDPj+QcDvH4/0gCQ+qRpYATIegS8zU5xQ8nPL8lba9YNejaOMzw8RB80g+2oPOJ3Wzx oMsmw8taUmd9TIw/bJ2VO1HniiJUGUXCqoeg8homvBOQ0PmWAWIwjC6nf6CIuIM4Egu2I5Kl jEF9ImTPcYZpw5vhdyPwBdXW2lSjV3EAqknWujRgcsm84nycuJnImwJptR481EWmtuH6ysj5 YhRVGbQPfdsjVUQfZdRdkEv4CZ90pdscBi1nRqcqANtzC+WQFwekDzk2lGqNRDg56s+q0KtY scOkTAZQGVpD/8AaLH4v1w== Message-ID: <0322def7-fc16-c805-8f2b-c88fffce2f1e@physik.fu-berlin.de> Date: Wed, 15 Jul 2020 16:37:14 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Original-Sender: glaubitz@physik.fu-berlin.de X-Originating-IP: 87.189.147.249 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Geert! On 7/15/20 10:27 AM, John Paul Adrian Glaubitz wrote: >> Lemme gues: does commit 002ae7057069538a ("mm, dump_page(): do not crash >> with invalid mapping pointer") in v5.8-rc1 help? > > Hmm, it seems I already have that patch (I'm using Linus' main tree): > > commit 002ae7057069538aa3afd500f6f60a429cb948b2 > Author: Vlastimil Babka > Date: Mon Jun 1 21:46:03 2020 -0700 > > mm, dump_page(): do not crash with invalid mapping pointer Okay, kernel 5.0.0 does not suffer from this bug. So I should be able to bisect this particular issue. I'm glad I don't have to start bisecting with earlier kernels because these won't build easily with my current toolchain based on gcc-9. Will report once I found the bad commit that introduced the problem. Adrian -- .''`. John Paul Adrian Glaubitz : :' : Debian Developer - glaubitz@debian.org `. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913