From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793010777; b=zbxPD7XznA1lFOqCvuXHYm5/8vgKA7T/WwlelucSqTgvjY6terefrvxBLH50sk7LmCr6 tSQUqrg7W19D5uzb1940tF9G02P8DRjxz2ZVJcyyPKiOOB5h+dUTdPzOGGBQiKevyq2hG 3YvInssQ3lKvNRq6r507PxxvEMXeu1Me1imUvtUPRTe88ZYePCerxE344Cv+zc3ZPXuUV TbgMRSFCHeZj1NlKcuticInWihfKkq0+gN9wzwQUNBYwsR1pWypmIg0hG5/7H+fEhklBj UX2LMdTPHI92i1fhRuY4NHmJEZPVpdJ/nS+XDRykk+Cdz3S/acoArTgkPxIzuIxqeAQ== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793010777; h=Received:DKIM-Signature:Message-ID:Date:MIME-Version:User-Agent: Subject:To:Cc:References:From:Content-Language:Autocrypt:In-Reply-To: Content-Type:Content-Transfer-Encoding; bh=5fGI+y4MpKjEewUYjAn8ox6qZ5C7dHcWOShQtBM7bNs=; b=O4j1I4mum1c6tB06HkPClJkOci10FX8H+qlzVD9CYHsn73X9PkXIy2ulCk9daI6qUaW4 IQlW1Is6hU64GDhXx87JiP6KKO3S3c3C/S7piepNix4XectcByBFTJP5rE3ME6PkIJYRj xrB6WwDWsn7VpO2deYSFjXnmEagFJ1Wsvyt6czWXVz5Fwo/VnwSRQg1y7cUPnLwUDt48b qWeDCS4dLNzzvSAcBvXchYJoAwjoSk1tGn/YWiRWldd6UAJ6CtE9JWAeTYCm4qcG+ByCW JlVi4BfM3Bu0/Y5UzfJv+wZmXob8nESpiS5/BSTe4cBR5LPFUXHYKjhrNGCwzHJadSA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=RO6dfT3Q; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 79BFE606A320; Mon, 26 Oct 2026 10:32:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=RO6dfT3Q Received: by smtp.kernel.org (Postfix) with ESMTPSA id ECD311F01828; Mon, 26 Oct 2026 10:32:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793010777; bh=5fGI+y4MpKjEewUYjAn8ox6qZ5C7dHcWOShQtBM7bNs=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=RO6dfT3QYsUPq4P/l+LzkzWsJNIeE4tNHdZ+B1Mabg0HNxC/baN6fFufRG2KvUn7o BX5QCIBZ5N8hEF6cNLuQlvNVEZ673nYKERFyr5nN1XR/ngPtDM5sBlxUf0xYx9yW34 HaVBERjbK3lHqcFAw3bgQZt2FvA3bZCr5p3BynhuGD9scfLpV5xQrhJXzl1iWPqe0e iqp/S03RLxbvRJrevVEedl7sWT8x7j9FPrfoz6X3dEmZEAc5qcXT0K8rvNu9VXTyeD f1yh7pVsA+wCM2I2F2zAlMsTlbpsIt1sprPvc3PJ9xhqSrReBqbyberrBKLfj+X5Cx Uu6l6Djs0qgyw== Message-ID: <8da0110d-e05a-4559-a581-44a1fe28a41f@kernel.org> Date: Mon, 26 Oct 2026 11:32:42 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 0/8] mm: remove unused functions To: Shivank Garg , Andrew Morton , Lorenzo Stoakes , "Liam R. Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Kairui Song , Qi Zheng , Shakeel Butt , Barry Song , Axel Rasmussen , Yuanchu Xie , Wei Xu , Baoquan He , Baolin Wang , "Matthew Wilcox (Oracle)" , Jan Kara , Hugh Dickins , Rik van Riel , Harry Yoo , Jann Horn , Lance Yang , Chris Li , Kemeng Shi , Nhat Pham , Youngjun Park , Jonathan Corbet , Shuah Khan , Johannes Weiner , Michal Hocko , Roman Gushchin , Muchun Song , Uladzislau Rezki , SJ Park , Minchan Kim , Sergey Senozhatsky , Alexander Potapenko , Marco Elver , Dmitry Vyukov , Pedro Falcato , Bharata B Rao Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, cgroups@vger.kernel.org, bpf@vger.kernel.org, damon@lists.linux.dev, kasan-dev@googlegroups.com References: <20261026-unused-sym-v1-0-82ca2dceabe1@amd.com> From: "David Hildenbrand (Arm)" Content-Language: en-US Autocrypt: addr=david@kernel.org; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzS5EYXZpZCBIaWxk ZW5icmFuZCAoQ3VycmVudCkgPGRhdmlkQGtlcm5lbC5vcmc+wsGQBBMBCAA6AhsDBQkmWAik AgsJBBUKCQgCFgICHgUCF4AWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaYJt/AIZAQAKCRBN 3hD3AP+DWriiD/9BLGEKG+N8L2AXhikJg6YmXom9ytRwPqDgpHpVg2xdhopoWdMRXjzOrIKD g4LSnFaKneQD0hZhoArEeamG5tyo32xoRsPwkbpIzL0OKSZ8G6mVbFGpjmyDLQCAxteXCLXz ZI0VbsuJKelYnKcXWOIndOrNRvE5eoOfTt2XfBnAapxMYY2IsV+qaUXlO63GgfIOg8RBaj7x 3NxkI3rV0SHhI4GU9K6jCvGghxeS1QX6L/XI9mfAYaIwGy5B68kF26piAVYv/QZDEVIpo3t7 /fjSpxKT8plJH6rhhR0epy8dWRHk3qT5tk2P85twasdloWtkMZ7FsCJRKWscm1BLpsDn6EQ4 jeMHECiY9kGKKi8dQpv3FRyo2QApZ49NNDbwcR0ZndK0XFo15iH708H5Qja/8TuXCwnPWAcJ DQoNIDFyaxe26Rx3ZwUkRALa3iPcVjE0//TrQ4KnFf+lMBSrS33xDDBfevW9+Dk6IISmDH1R HFq2jpkN+FX/PE8eVhV68B2DsAPZ5rUwyCKUXPTJ/irrCCmAAb5Jpv11S7hUSpqtM/6oVESC 3z/7CzrVtRODzLtNgV4r5EI+wAv/3PgJLlMwgJM90Fb3CB2IgbxhjvmB1WNdvXACVydx55V7 LPPKodSTF29rlnQAf9HLgCphuuSrrPn5VQDaYZl4N/7zc2wcWM7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20261026-unused-sym-v1-0-82ca2dceabe1@amd.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 10/26/26 11:30, Shivank Garg wrote: > This series removes 16 functions and one variable in mm that have no > users left anywhere in the tree. The functions are all static inline > helpers in headers, which no compiler warns about: GCC never reports > unused static inline functions, and Clang only reports them in .c > files, and only with W=2. The variable is heap_stack_gap in > mm/nommu.c, unused since the start of git history. Each patch covers > one file or subsystem, so they can be picked or dropped independently. > > How they were found: > > I wrote some Python scripts, with the help of an LLM, that scan the > whole tree for every config and architecture at once. They look for > static inline functions without callers, and for non-static functions > named nowhere but in their own definition, declarations, stubs and > EXPORT_SYMBOL(). Where a ## macro could paste together one of the > names, they read every call of that macro to see whether one does. > The candidates were then cross-checked with a real build: a scratch > tree marks each one __deprecated, an x86_64 allmodconfig build is run, > and any candidate that triggers even one deprecation warning is > dropped. The final report labels a symbol "Sure" only when that build > confirms it unused, and "Unsure" when the build doesn't compile it or > the scripts can't rule out a use. > > Before posting, I searched lore with semcode MCP for removals that > others had already posted, to avoid duplicates. Each patch was also > build-tested on its own. > > The scripts and a generated HTML report are here [1], if anyone wants > to play with them: > After the merge window please. Focus on reviewing fixes on the list. -- Cheers, David