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t=1550403784; bh=uLrzBMyEsVLafbDmEBry/dMS/FwaEVrPyh9PeDPsqTI=; h=X-UI-Sender-Class:Subject:To:Cc:References:From:Date:In-Reply-To; b=Wys8bPr+RKxoKf4WpJtdFLC1xoCZSjLAtLxeHs7f1h71ZElex17qdbPdmJrCdAjwq bJvVWyT7Z0UDcLR0t2a67UaurMdz1x6YRBKg8MgzxI/eMM0KV3aQZhsVMAhV7nfYHl eXzG51rsREJCRFIcgqFyHaHM9awutD/+wxBGTqJ8= X-UI-Sender-Class: c548c8c5-30a9-4db5-a2e7-cb6cb037b8f9 Received: from [192.168.1.3] ([93.132.167.97]) by smtp.web.de (mrweb003 [213.165.67.108]) with ESMTPSA (Nemesis) id 0MSaea-1gW0Tc1tps-00RYlm; Sun, 17 Feb 2019 12:43:04 +0100 Subject: Re: [PATCH v6] coccinelle: semantic code search for missing put_device() To: Julia Lawall , Wen Yang Cc: Gilles Muller , Nicolas Palix , Michal Marek , Masahiro Yamada , Wen Yang , Cheng Shengyu , kernel-janitors@vger.kernel.org, LKML , Coccinelle References: <8e7ba7c0-b7fe-a1f0-d28b-0c716ecbcfdb@web.de> From: Markus Elfring Openpgp: preference=signencrypt Autocrypt: addr=Markus.Elfring@web.de; prefer-encrypt=mutual; keydata= mQINBFg2+xABEADBJW2hoUoFXVFWTeKbqqif8VjszdMkriilx90WB5c0ddWQX14h6w5bT/A8 +v43YoGpDNyhgA0w9CEhuwfZrE91GocMtjLO67TAc2i2nxMc/FJRDI0OemO4VJ9RwID6ltwt mpVJgXGKkNJ1ey+QOXouzlErVvE2fRh+KXXN1Q7fSmTJlAW9XJYHS3BDHb0uRpymRSX3O+E2 lA87C7R8qAigPDZi6Z7UmwIA83ZMKXQ5stA0lhPyYgQcM7fh7V4ZYhnR0I5/qkUoxKpqaYLp YHBczVP+Zx/zHOM0KQphOMbU7X3c1pmMruoe6ti9uZzqZSLsF+NKXFEPBS665tQr66HJvZvY GMDlntZFAZ6xQvCC1r3MGoxEC1tuEa24vPCC9RZ9wk2sY5Csbva0WwYv3WKRZZBv8eIhGMxs rcpeGShRFyZ/0BYO53wZAPV1pEhGLLxd8eLN/nEWjJE0ejakPC1H/mt5F+yQBJAzz9JzbToU 5jKLu0SugNI18MspJut8AiA1M44CIWrNHXvWsQ+nnBKHDHHYZu7MoXlOmB32ndsfPthR3GSv jN7YD4Ad724H8fhRijmC1+RpuSce7w2JLj5cYj4MlccmNb8YUxsE8brY2WkXQYS8Ivse39MX BE66MQN0r5DQ6oqgoJ4gHIVBUv/ZwgcmUNS5gQkNCFA0dWXznQARAQABtCZNYXJrdXMgRWxm cmluZyA8TWFya3VzLkVsZnJpbmdAd2ViLmRlPokCVAQTAQgAPhYhBHDP0hzibeXjwQ/ITuU9 Figxg9azBQJYNvsQAhsjBQkJZgGABQsJCAcCBhUICQoLAgQWAgMBAh4BAheAAAoJEOU9Figx g9azcyMP/iVihZkZ4VyH3/wlV3nRiXvSreqg+pGPI3c8J6DjP9zvz7QHN35zWM++1yNek7Ar OVXwuKBo18ASlYzZPTFJZwQQdkZSV+atwIzG3US50ZZ4p7VyUuDuQQVVqFlaf6qZOkwHSnk+ CeGxlDz1POSHY17VbJG2CzPuqMfgBtqIU1dODFLpFq4oIAwEOG6fxRa59qbsTLXxyw+PzRaR LIjVOit28raM83Efk07JKow8URb4u1n7k9RGAcnsM5/WMLRbDYjWTx0lJ2WO9zYwPgRykhn2 sOyJVXk9xVESGTwEPbTtfHM+4x0n0gC6GzfTMvwvZ9G6xoM0S4/+lgbaaa9t5tT/PrsvJiob kfqDrPbmSwr2G5mHnSM9M7B+w8odjmQFOwAjfcxoVIHxC4Cl/GAAKsX3KNKTspCHR0Yag78w i8duH/eEd4tB8twcqCi3aCgWoIrhjNS0myusmuA89kAWFFW5z26qNCOefovCx8drdMXQfMYv g5lRk821ZCNBosfRUvcMXoY6lTwHLIDrEfkJQtjxfdTlWQdwr0mM5ye7vd83AManSQwutgpI q+wE8CNY2VN9xAlE7OhcmWXlnAw3MJLW863SXdGlnkA3N+U4BoKQSIToGuXARQ14IMNvfeKX NphLPpUUnUNdfxAHu/S3tPTc/E/oePbHo794dnEm57LuuQINBFg2+xABEADZg/T+4o5qj4cw nd0G5pFy7ACxk28mSrLuva9tyzqPgRZ2bdPiwNXJUvBg1es2u81urekeUvGvnERB/TKekp25 4wU3I2lEhIXj5NVdLc6eU5czZQs4YEZbu1U5iqhhZmKhlLrhLlZv2whLOXRlLwi4jAzXIZAu 76mT813jbczl2dwxFxcT8XRzk9+dwzNTdOg75683uinMgskiiul+dzd6sumdOhRZR7YBT+xC wzfykOgBKnzfFscMwKR0iuHNB+VdEnZw80XGZi4N1ku81DHxmo2HG3icg7CwO1ih2jx8ik0r riIyMhJrTXgR1hF6kQnX7p2mXe6K0s8tQFK0ZZmYpZuGYYsV05OvU8yqrRVL/GYvy4Xgplm3 DuMuC7/A9/BfmxZVEPAS1gW6QQ8vSO4zf60zREKoSNYeiv+tURM2KOEj8tCMZN3k3sNASfoG fMvTvOjT0yzMbJsI1jwLwy5uA2JVdSLoWzBD8awZ2X/eCU9YDZeGuWmxzIHvkuMj8FfX8cK/ 2m437UA877eqmcgiEy/3B7XeHUipOL83gjfq4ETzVmxVswkVvZvR6j2blQVr+MhCZPq83Ota xNB7QptPxJuNRZ49gtT6uQkyGI+2daXqkj/Mot5tKxNKtM1Vbr/3b+AEMA7qLz7QjhgGJcie qp4b0gELjY1Oe9dBAXMiDwARAQABiQI8BBgBCAAmFiEEcM/SHOJt5ePBD8hO5T0WKDGD1rMF Alg2+xACGwwFCQlmAYAACgkQ5T0WKDGD1rOYSw/+P6fYSZjTJDAl9XNfXRjRRyJSfaw6N1pA Ahuu0MIa3djFRuFCrAHUaaFZf5V2iW5xhGnrhDwE1Ksf7tlstSne/G0a+Ef7vhUyeTn6U/0m +/BrsCsBUXhqeNuraGUtaleatQijXfuemUwgB+mE3B0SobE601XLo6MYIhPh8MG32MKO5kOY hB5jzyor7WoN3ETVNQoGgMzPVWIRElwpcXr+yGoTLAOpG7nkAUBBj9n9TPpSdt/npfok9ZfL /Q+ranrxb2Cy4tvOPxeVfR58XveX85ICrW9VHPVq9sJf/a24bMm6+qEg1V/G7u/AM3fM8U2m tdrTqOrfxklZ7beppGKzC1/WLrcr072vrdiN0icyOHQlfWmaPv0pUnW3AwtiMYngT96BevfA qlwaymjPTvH+cTXScnbydfOQW8220JQwykUe+sHRZfAF5TS2YCkQvsyf7vIpSqo/ttDk4+xc Z/wsLiWTgKlih2QYULvW61XU+mWsK8+ZlYUrRMpkauN4CJ5yTpvp+Orcz5KixHQmc5tbkLWf x0n1QFc1xxJhbzN+r9djSGGN/5IBDfUqSANC8cWzHpWaHmSuU3JSAMB/N+yQjIad2ztTckZY pwT6oxng29LzZspTYUEzMz3wK2jQHw+U66qBFk8whA7B2uAU1QdGyPgahLYSOa4XAEGb6wbI FEE= Message-ID: <1c152067-0135-79d7-1285-4bb9925054c8@web.de> Date: Sun, 17 Feb 2019 12:42:59 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:QAs6cBfuHiFrpIdepJJUhXGBf2VFHpYaEtSoJ79Dd0SpPNn91nR dDDLgra1VnGDpQQOTwzJQ++bHqlJYxN8l7nTYLvBtfr5hkiNbCvQ8NYFl84AiPMr4kwsVhS S/tp2y3+HTmA21RdKOcGSjnw1U5e2nzzM4GUAOumlOWt/5/cfpu8fMxR8rcrWQ+cs/JE8FG QNtz0ut2YEHDlfzXNcHiA== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:aRcCp9rdvUs=:7rGNuA0GrkB6qfCNyBkYJ4 jjRF5FQ5fGHe/7HhNorRNztynf20kLyvyWbij7SNdeHRIG1QLFX7G39n6hjI5ALD7jJhQiqHI 6qeoFQ3rgkoz4RhCa40+kaK2X6lIlrV6htxUse+n1jbzuaUIGiFprIhrdSeQvUNAjD3UzmO33 Y4Bw0U9wZ/R4F0LO/8NaZ58zF5okm5lhXXNUS7sDvpGT7TmBBuYKRCR+f2m+4bmJogZZaLPeN QNoXK6WGvsY5q/bgeS7I3TdXK+JBbx6OSMsWWJOfdLYl7sgRakyqja/jdL/FDYFTNOixQOwzl fTix6gagE3GoqJORhIGXzr1mjOjI0RCKQ0liT6iN0qVYjN6k9Dyjn9k3vg71vT2fXALhmCwkS zmh7Xh7KB++G0PktvgBvoHRz8MP3h92cmu+s/3633yOXy0gavCurxXChapHXeFcuUWbFACKb3 9bcD2nbVxjmq/0LgSOHi4Mjm6y62RdM8pZpl9nPrrTu1tFdUvHNw3GYY1ObqKqmeNHOqqpg6+ DlyVAljiCgrivea/fxXRJ+dIHCyuF/mxLEQ48ivCmSag12mnV8ruZk4wbXfd/3r1CebgUj9yH +B5zOiJFu6zH3fLIM6khEzGr11VR4/GrsojdRwE8hndjMGZx4TFajm7cnkTa0BkyiU4uCfpm8 SK3xGU9klwtgL8Hk96esdBe8nzXYZH76G7/MBI30d7YHGoZit0rnk2DsKgLN51Ujtq8dWWG2k FQfmtL9J6Vi+2qGZnvA5C7RGpinyO394xoA2TA5I3h9XgPbF7mZum9n0h1+bv7Dp29Ngsb97i FNP1g+LqhgXbShHbAR58z0s4jDot3KSsbJhbLd6aXO5K+sbrj+FNBhdkcibfQMeifM0g07UfM PgA/XjQURD/2dhs5BSZn9cJRcJZVdMCT+Q9igro/EulJY1R+Axjz8ng/V6dC7Nd436uAFhvU9 m2tuNeKmHtA== Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org >>> +@search exists@ >>> +local idexpression id; >>> +expression x,e,e1; >>> +position p1,p2; >>> +type T,T1,T2; >>> +@@ >>> + >>> +id =3D of_find_device_by_node@p1(x) >>> +... when !=3D e =3D id >> >> I suggest to increase your software development attention also for >> another implementation detail. >> Source code analysis triggers challenges for safe data flow handling. >> the semantic patch language supports search specifications for >> the exclusion of specific assignments. >> >> Does this SmPL code contain a questionable order for the source >> and target metavariables? >> Can the following variant be more appropriate? >> >> + ... when !=3D id =3D e > > This is possible, but I think unlikely. Would you dare to interpret my update suggestion (reordering of two identi= fiers) as a required SmPL script correction? Regards, Markus