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[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 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 Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: B95A9100017 X-Stat-Signature: 6bkfzwe5btz8cnne7xsgqc5psxrybheo X-Rspam-User: X-HE-Tag: 1756740327-645227 X-HE-Meta: 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 uvqc0HEh xETNvcYdLve5h3DvsC1spGkS2gE0KAlcgtpcFcz8V9kP1Vii1D0syAzzfZPSVFy1/0BxD/QraGR7xWTre1+EbtvEtbnWqxaKpgPipcHEFFalT7Hx5HlfQWr6jgmCDDz4XyI7cABOqvpF76EdYAX4Q+uMNI56fi8z4HxMJIzeUcBZ4NNEobHhmdBjkevg7Fax3lVOEy0luy94xlfAjUCST5mQniTF9PipQdH/QNCdGXzHtdXdj86oXzlZq9GZ5KE1r+r8KH0DtOkp6De+pTAZLMrFgnfe8b+H/1rt9holLlPqCJdlyis79irw4GX/t2w9wlbH8i21NqP92ODtRHCWJ0CKtUPL4IRaVW+Pa00fyzgBQWU/4kDIFUBsmkLbJxOLkOKk1YhDVJDtK996c9dP8+iu6cwNPPNC7N1NNh0Sum0y0Oa7Z2ho8yQeN01E9RpCNwr60pWtpYn6UI2FeJLqGLLgYji1cysocmBkv X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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