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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 Precedence: bulk X-Mailing-List: linux-kernel@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; 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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