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[2003:dc:6f1d:f00:230:64ff:fe74:809]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-afefc7f1174sm257964466b.9.2025.08.29.11.32.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 29 Aug 2025 11:32:11 -0700 (PDT) From: Max Kellermann To: akpm@linux-foundation.org, david@redhat.com, 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 Cc: Max Kellermann Subject: [PATCH 06/12] mm/util: add `const` to several pointer parameters Date: Fri, 29 Aug 2025 20:31:53 +0200 Message-ID: <20250829183159.2223948-7-max.kellermann@ionos.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250829183159.2223948-1-max.kellermann@ionos.com> References: <20250829183159.2223948-1-max.kellermann@ionos.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: DB3E740010 X-Stat-Signature: gpe9mgjfgh3ua1qopocfwhjmna5qekyp X-Rspam-User: X-HE-Tag: 1756492333-662667 X-HE-Meta: U2FsdGVkX1/whq9vm9YVTs/72SiHhTNGpvssNoEIQcq4MkeRAbhcxb++NKgM9Oj4Wap57x3U90trAVkyj6AeafPPKvXTN6z0Wzsnj60bwD+8N7NfhdfdaOLoE9Xcz/3vV5j73OELDAdPFAjPBaaB9HFsvQdKhbjOFC35JPCAKxP0NvNKCw5MD+xo7zE0/FhIDmQ3Ru5bclvyP3ElNh9B4e+j+mksrElt6Wwo635ik6+SGCUb/CV83quyiK5DS+lJGGMrUD33gIqwXp8cXQpsiB0r5aqfeqgToH43QA6fnjTOVG3xltmmBNZqG1jnmwoxjO4j4ZLuNB3frnh29d0Kf7T6TvQ75jxeJbMh1Z9VR73r7UQBxJNBb3e1Or1IBpl7L4pr9dr3hgIwr19HSjRS7Zxj2vLkjv7Z8AXGIXlZByM0wFa1Uu/Vy67S5m+EybIVltibNMRz9qOigdB1FFZxrE/oWCPZ86yPWzd/LbTjaGoKPW3ANI0DIZFubgMR8pm7R31WjjdChLK5a+1SH7zH81MdzLgpNLNRSkms0XXx+0G/pftEuCUaSBYZFPeys6jyZkDE9pDcF1fDwwQ0LmQie0t7AnUugSMBP3xaw/XNQkXH1LmuZfXH4AmzH+UV6gdLwl8bXGaPSvElYh0e5/imgz1GF27rS9IfhNLJM+Mt+qn3KQa+hmO+oD2fnyS0JgdxTQyerl5FrAJga+4s4AII2VjP/yd0kMG5ANVr/5I8fgKk737T54NGIpx+WN5/pROS6f9fkBacSj0Pp6/xuSLRMLuBxRndr/VY9LJONiqc1PthlTLo59758HhQ31YXLerZBbIZJSlxAF9H370FEcChSmNkkkXbGX4PM+YL4XspLR/v868YkyZ2bwcfMm4gtGoMFnYQtojbJkMqyP4RQ/LjFjEjGP98Ug68wrxNYN/5A5PbwfSfdXoQ0dzaoB7EuCtmf4xsc2N73ROGql2sLAW SL33XGBo 5sgz1cKKMey7kYiivWbad057SIzeOzHfLY4DIpKer1hM8MUQAO2kV3Xpaglvo+/lfLS2ASXx1nNa96pZAen6hQYpfvnwUUn5tHzPHxgoUnd32flpvy/yWFx8xzE8jcPI6JYPPY460y3x13MGonahQfEU+OSXmbcoklmaTDWVPY1CMNznhxEC1BWrv2vzTMqutNo8OfrDo33pCYsvpjOI1pnLsebyVSVaevx6phDmwp0w+LGxNBr5ddzRROgWDrSjjef0bPqK4DbNnKMTLR+6Tyhq+YfY5LscVueu0oAtxDGDbatpGqsC3YqT0zmPGsSZ5uKJ/5Yt4iAPldkk9t38Y6992Dg1B3LedjvzhsJLy23eQRWHgZmIdlZMgxA== 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: For improved const-correctness. Signed-off-by: Max Kellermann --- include/linux/mm.h | 6 +++--- include/linux/pagemap.h | 2 +- mm/util.c | 10 +++++----- 3 files changed, 9 insertions(+), 9 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index a795deef93eb..48fe838723ed 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -986,7 +986,7 @@ static inline bool vma_is_shmem(const struct vm_area_struct *vma) { return false static inline bool vma_is_anon_shmem(const struct vm_area_struct *vma) { return false; } #endif -int vma_is_stack_for_current(struct vm_area_struct *vma); +int vma_is_stack_for_current(const struct vm_area_struct *vma); /* flush_tlb_range() takes a vma, not a mm, and can care about flags */ #define TLB_FLUSH_VMA(mm,flags) { .vm_mm = (mm), .vm_flags = (flags) } @@ -2585,7 +2585,7 @@ void folio_add_pin(struct folio *folio); int account_locked_vm(struct mm_struct *mm, unsigned long pages, bool inc); int __account_locked_vm(struct mm_struct *mm, unsigned long pages, bool inc, - struct task_struct *task, bool bypass_rlim); + const struct task_struct *task, bool bypass_rlim); struct kvec; struct page *get_dump_page(unsigned long addr, int *locked); @@ -3348,7 +3348,7 @@ void anon_vma_interval_tree_verify(struct anon_vma_chain *node); avc; avc = anon_vma_interval_tree_iter_next(avc, start, last)) /* mmap.c */ -extern int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin); +extern int __vm_enough_memory(const struct mm_struct *mm, long pages, int cap_sys_admin); extern int insert_vm_struct(struct mm_struct *, struct vm_area_struct *); extern void exit_mmap(struct mm_struct *); bool mmap_read_lock_maybe_expand(struct mm_struct *mm, struct vm_area_struct *vma, diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h index 87411e7f2dba..eb50e0124cd0 100644 --- a/include/linux/pagemap.h +++ b/include/linux/pagemap.h @@ -549,7 +549,7 @@ static inline void filemap_nr_thps_dec(struct address_space *mapping) #endif } -struct address_space *folio_mapping(struct folio *); +struct address_space *folio_mapping(const struct folio *); /** * folio_flush_mapping - Find the file mapping this folio belongs to. diff --git a/mm/util.c b/mm/util.c index d235b74f7aff..241d2eaf26ca 100644 --- a/mm/util.c +++ b/mm/util.c @@ -315,7 +315,7 @@ void *memdup_user_nul(const void __user *src, size_t len) EXPORT_SYMBOL(memdup_user_nul); /* Check if the vma is being used as a stack by this task */ -int vma_is_stack_for_current(struct vm_area_struct *vma) +int vma_is_stack_for_current(const struct vm_area_struct *vma) { struct task_struct * __maybe_unused t = current; @@ -410,7 +410,7 @@ unsigned long arch_mmap_rnd(void) return rnd << PAGE_SHIFT; } -static int mmap_is_legacy(struct rlimit *rlim_stack) +static int mmap_is_legacy(const struct rlimit *rlim_stack) { if (current->personality & ADDR_COMPAT_LAYOUT) return 1; @@ -504,7 +504,7 @@ EXPORT_SYMBOL_IF_KUNIT(arch_pick_mmap_layout); * * -ENOMEM if RLIMIT_MEMLOCK would be exceeded. */ int __account_locked_vm(struct mm_struct *mm, unsigned long pages, bool inc, - struct task_struct *task, bool bypass_rlim) + const struct task_struct *task, bool bypass_rlim) { unsigned long locked_vm, limit; int ret = 0; @@ -688,7 +688,7 @@ struct anon_vma *folio_anon_vma(const struct folio *folio) * You can call this for folios which aren't in the swap cache or page * cache and it will return NULL. */ -struct address_space *folio_mapping(struct folio *folio) +struct address_space *folio_mapping(const struct folio *folio) { struct address_space *mapping; @@ -926,7 +926,7 @@ EXPORT_SYMBOL_GPL(vm_memory_committed); * Note this is a helper function intended to be used by LSMs which * wish to use this logic. */ -int __vm_enough_memory(struct mm_struct *mm, long pages, int cap_sys_admin) +int __vm_enough_memory(const struct mm_struct *mm, long pages, int cap_sys_admin) { long allowed; unsigned long bytes_failed; -- 2.47.2