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[2003:d8:2f37:2b00:948c:dd9f:29c8:73f4]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-45b7df3ff72sm99174625e9.1.2025.09.01.06.58.14 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 01 Sep 2025 06:58:16 -0700 (PDT) Message-ID: <2ad655ca-7003-4030-bb2d-1c4bcfda30cc@redhat.com> Date: Mon, 1 Sep 2025 15:58:14 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v5 08/12] mm: constify arch_pick_mmap_layout() for improved const-correctness To: Max Kellermann , 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> <20250901123028.3383461-9-max.kellermann@ionos.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: k9msjycph7wajz8wbx6st6hdnw1qkq5a X-Rspam-User: X-Rspamd-Queue-Id: D1ECFC000B X-Rspamd-Server: rspam05 X-HE-Tag: 1756735130-356052 X-HE-Meta: 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 UHL+LnYs 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 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 14:30, Max Kellermann wrote: > This function only reads from the rlimit pointer (but writes to the > mm_struct pointer which is kept without `const`). > > All callees are already const-ified or (internal functions) are being > constified by this patch. > > Signed-off-by: Max Kellermann > Reviewed-by: Vishal Moola (Oracle) > --- [...] > index 2201da0afecc..0232d983b715 100644 > --- a/include/linux/sched/mm.h > +++ b/include/linux/sched/mm.h > @@ -178,7 +178,7 @@ static inline void mm_update_next_owner(struct mm_struct *mm) > #endif > > extern void arch_pick_mmap_layout(struct mm_struct *mm, > - struct rlimit *rlim_stack); > + const struct rlimit *rlim_stack); > > unsigned long > arch_get_unmapped_area(struct file *filp, unsigned long addr, > @@ -211,7 +211,7 @@ generic_get_unmapped_area_topdown(struct file *filp, unsigned long addr, > unsigned long flags, vm_flags_t vm_flags); > #else > static inline void arch_pick_mmap_layout(struct mm_struct *mm, > - struct rlimit *rlim_stack) {} > + const struct rlimit *rlim_stack) {} > #endif Should both these cases also use *const? (for the latter we probably don't care either, but maybe just to be consistent) -- Cheers David / dhildenb