From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4F27C32F768 for ; Mon, 1 Sep 2025 15:25:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756740329; cv=none; b=CB7yNj5icJylCjzxZhLjU2vg4yegi/WtRVsaF9WxQb5A7d7y1/4+1eVKHq+dQnCZjK5YRTC/yF5EUdVIXhIlNLVtUrkBr8UBGYTuHYn2RPXg2dsvH3DRTZPYHvwkiS4RM67noe7WX6jRlJauh+9FBhZ5Sjd48H5dq5qq7esW3v8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756740329; c=relaxed/simple; bh=iLPg5/NsqE2fgJNlNze5wZTZC18RwFd3hiEqg2oxKz8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=TBi8rhKnr+2S9GIszJjSKHRHcI3zFWswug/gc+7oE7pQAhiH5q6/cj/11idDiYnuXwM4JjM0aW9zwFuYEbqZxkg8WF6mbS4tVDmanxw195/ircu3gafb9B92c7rffPVo3T94uN9I5QV5FQov4gsJMABnjUPWjCTYSXNWX+7vplc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=JajueSMK; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="JajueSMK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1756740327; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=t7wTvc9eUbw7jtHlrnxQy+rN4qRUOO7ojXz7+PUk6M8=; b=JajueSMKM0IjV39DBZ6nXqgNqJmzASMyInByClVwCfutfAFEEr0Kl5ZWFHBJ3mCOLJmKWv iPYBCXfVcizcWGyeTIWqoBgm5gC/hyA59PIWTOOQM3SBS8/9FPtjk6+obGoNdPT6dYlOPX K65Jz9MGigTWU44Xe8gSUvqZau9e9WY= Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-161-Ypl5oxWFMV6rEK0cFj_-bg-1; Mon, 01 Sep 2025 11:25:26 -0400 X-MC-Unique: Ypl5oxWFMV6rEK0cFj_-bg-1 X-Mimecast-MFC-AGG-ID: Ypl5oxWFMV6rEK0cFj_-bg_1756740325 Received: by mail-wr1-f72.google.com with SMTP id ffacd0b85a97d-3d3d2472b92so1008463f8f.1 for ; Mon, 01 Sep 2025 08:25:26 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1756740325; x=1757345125; h=content-transfer-encoding:in-reply-to:autocrypt:content-language :from:references:cc:to:subject:user-agent:mime-version:date :message-id:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=t7wTvc9eUbw7jtHlrnxQy+rN4qRUOO7ojXz7+PUk6M8=; b=S6BNGzoWHaGwH9/+UbzAWi1Te9UG0SURc8+z9CBkPKzWvihmbLEREr4BsdKD1SrxNI q7lsk1Lf9CMsww5UnUAAyyxBmjs2NEyg7eOKVsAMY86V4ur9qOxdLps1w8GG1Cqs2jok EvrpMqzuEt2TLqUWiC5NGREwJkZ66FFTdc27yhq3IDx2sNDntYFt0nrcjdLgfJYET9bD vOKnBO4UDZhev4IynxFso2a4yH/3qq2cHih4uDWIc32BRjec3WiiD+mKgOzgdGwMIkRb fCoLZt7l+3inkKDasaMeaCVBXfzgx4XXnz3XhJdtBHoAlfGEe8XFRLQdKyaLluwRtADs rayQ== X-Forwarded-Encrypted: i=1; AJvYcCUDWlh1TVzP/Ehmmalzuec8A3Swoju7I6klycEcJhzlRj741RGGUwz2ZiOAbUR0DDehUj5/SyY8iKUgGzs=@vger.kernel.org X-Gm-Message-State: AOJu0YzX3/T416kdZDCisaZml8cwOiBP5kRg8kab/MjMZHJbnYPCU4eF 3gdjJByD/DEGXDHUOT0ON/yDxN+zngPlymLeK9A/USa6sncZrbzkdiDclZdFZRgOP1o/Sq+O8cp /fFX2b0e/mgBDsGx3L5HSjm62TNBFdoQk6PGdQ1shpBcq4lFj3UvTKJW1ULlxKAE54A== X-Gm-Gg: ASbGncsMezDQoJXKSz+UPFDHhvQDobiMFg4zEY1I0tR2Qd88JM8fLr8a//miRWxkBLd nNERCz+cK4EvjkAzkwalBBtU50CQhtDedQzMagb0wZBB8MGrBX+QGVNY3pIn2VgKU0dUNwWgJo8 ClW4JwIR4ZvsIMVT51c1NJ/E9VD/DZf+3N9PCLIlecgzmaRmPOkIHHr9ZKnStt8pf8N1D10Fg1i vmPnel2ANSe9ZmgYRObujEf2vXCadCO4zDZD8k6D7ULbC3oOULaaUh5+peHGNbTbhJj8RdYFGsq /eG9ENPk07vMpF6F7Sy+Qjm9iITlyGgLicuTxE6djKd3oKC/e9cvWjWAhyIXlmrLWRaDNqSWrWh A2U0ZRu6bF6PiELkr0dHjvTbCsb789sIBKBvKPp5ljtvo7MplNohu74iQNfArINIfFd0= X-Received: by 2002:a5d:5d09:0:b0:3b8:893f:a185 with SMTP id ffacd0b85a97d-3d1df34f216mr7377181f8f.53.1756740325010; Mon, 01 Sep 2025 08:25:25 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHyQFfDTfcx6weYHYURNCUN2TyUMgP1+sDx60HW3E6IenOe07uG2Bl4c+GEZR2K3WNO1i1qFA== X-Received: by 2002:a5d:5d09:0:b0:3b8:893f:a185 with SMTP id ffacd0b85a97d-3d1df34f216mr7377103f8f.53.1756740324457; Mon, 01 Sep 2025 08:25:24 -0700 (PDT) Received: from ?IPV6:2003:d8:2f37:2b00:948c:dd9f:29c8:73f4? (p200300d82f372b00948cdd9f29c873f4.dip0.t-ipconnect.de. [2003:d8:2f37:2b00:948c:dd9f:29c8:73f4]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-3d21a80c723sm10724135f8f.9.2025.09.01.08.25.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 01 Sep 2025 08:25:23 -0700 (PDT) Message-ID: <4ce074b4-8f79-4e69-81c1-d6e28239ccf0@redhat.com> Date: Mon, 1 Sep 2025 17:25:20 +0200 Precedence: bulk X-Mailing-List: linux-parisc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 11/12] mm: constify assert/test functions in mm.h To: Max Kellermann Cc: akpm@linux-foundation.org, axelrasmussen@google.com, yuanchu@google.com, willy@infradead.org, hughd@google.com, mhocko@suse.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, vishal.moola@gmail.com, linux@armlinux.org.uk, James.Bottomley@hansenpartnership.com, deller@gmx.de, agordeev@linux.ibm.com, gerald.schaefer@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, davem@davemloft.net, andreas@gaisler.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, chris@zankel.net, jcmvbkbc@gmail.com, viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz, weixugc@google.com, baolin.wang@linux.alibaba.com, rientjes@google.com, shakeel.butt@linux.dev, thuth@redhat.com, broonie@kernel.org, osalvador@suse.de, jfalempe@redhat.com, mpe@ellerman.id.au, nysal@linux.ibm.com, linux-arm-kernel@lists.infradead.org, linux-parisc@vger.kernel.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, linux-fsdevel@vger.kernel.org References: <20250901123028.3383461-1-max.kellermann@ionos.com> <20250901123028.3383461-12-max.kellermann@ionos.com> <081a7335-ec84-4e26-9ea2-251e3fc42277@redhat.com> From: David Hildenbrand Content-Language: en-US Autocrypt: addr=david@redhat.com; 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 B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+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: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 01.09.25 17:17, Max Kellermann wrote: > On Mon, Sep 1, 2025 at 4:07 PM David Hildenbrand wrote: >>> -static inline void assert_fault_locked(struct vm_fault *vmf) >>> +static inline void assert_fault_locked(const struct vm_fault *vmf) >>> { >> >> This confused me a bit: in the upper variant it's "*const" and here it's >> "const *". > > That was indeed a mistake. Both should be "const*const". > >> There are multiple such cases here, which might imply that it is not >> "relatively trivial to const-ify them". :) > > I double-checked this patch and couldn't find any other such mistake. > Or do you mean the function vs prototype thing on parameter values? If there is a simple rule (declaration/definition), then it's trivial. Probably worth spelling out that rule somewhere (unless I missed it). As raised in the other reply, not sure if we should just keep them in sync. I'm, not the biggest fan of the *const in general here. I can see why Andrew suggested it, but only doing that for pointers is a bit weird. Anyhow, that discussion is likely happening elsewhere, and I don't think there is real harm when doing it, as long as we are consistent with what we're doing. -- Cheers David / dhildenb