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Y . Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , Alexander Shishkin , Maxime Coquelin , Alexandre Torgue , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Bodo Stroesser , "Martin K . Petersen" , David Howells , Marc Dionne , Alexander Viro , Christian Brauner , Jan Kara , David Hildenbrand , "Liam R . Howlett" , Vlastimil Babka , Mike Rapoport , Suren Baghdasaryan , Michal Hocko , Jann Horn , Pedro Falcato , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-mtd@lists.infradead.org, linux-staging@lists.linux.dev, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-afs@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, Ryan Roberts Subject: [PATCH v3 03/16] mm: document vm_operations_struct->open the same as close() Date: Thu, 19 Mar 2026 18:23:27 +0000 Message-ID: <808919eaae0b682ec631301b3c06d85c62ba428d.1773944114.git.ljs@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 45E674000B X-Rspamd-Server: rspam08 X-Stat-Signature: q55bbsrkjw79wb1wod9ecfetz3oz7qfc X-HE-Tag: 1773944635-122368 X-HE-Meta: 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 Z+22phnk J3I5B2S/OF2fCWtJTIxIjYHsEdzPffKirOTt60hKBMKGx5BTepHJztKqBsLkB7SXU7GRfPeiR4pRyRalrRSsVObrnAQ2bO7BLhXnIlb7AC7J44EFZnq+cWMbzLNN9ofo4Wsl21U8TjAscTKiXgHPIay4uEziqfVCOzLvsmSbtiD/gyqXqjJdTn4LTtb8Y1EQqW/1ytWTLzq7DTPr5cQc/jhJ+DLbvOoPj+DG7HNO7FXm8U20roS39V8ak7osO8WVZSCs1BoXtefFMinam1GrhH/OQvF3A3gFjPUPdkso9WLQPlGvz2UPTm/t95zhfy3T0l6BBrLSQDnFfZPMWkpuap5KFMKmGsqwMFICb Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Describe when the operation is invoked and the context in which it is invoked, matching the description already added for vm_op->close(). While we're here, update all outdated references to an 'area' field for VMAs to the more consistent 'vma'. Signed-off-by: Lorenzo Stoakes (Oracle) --- include/linux/mm.h | 15 ++++++++++----- tools/testing/vma/include/dup.h | 15 ++++++++++----- 2 files changed, 20 insertions(+), 10 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 1e63b3a44a47..da94edb287cd 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -766,15 +766,20 @@ struct vm_uffd_ops; * to the functions called when a no-page or a wp-page exception occurs. */ struct vm_operations_struct { - void (*open)(struct vm_area_struct * area); + /** + * @open: Called when a VMA is remapped, split or forked. Not called + * upon first mapping a VMA. + * Context: User context. May sleep. Caller holds mmap_lock. + */ + void (*open)(struct vm_area_struct *vma); /** * @close: Called when the VMA is being removed from the MM. * Context: User context. May sleep. Caller holds mmap_lock. */ - void (*close)(struct vm_area_struct * area); + void (*close)(struct vm_area_struct *vma); /* Called any time before splitting to check if it's allowed */ - int (*may_split)(struct vm_area_struct *area, unsigned long addr); - int (*mremap)(struct vm_area_struct *area); + int (*may_split)(struct vm_area_struct *vma, unsigned long addr); + int (*mremap)(struct vm_area_struct *vma); /* * Called by mprotect() to make driver-specific permission * checks before mprotect() is finalised. The VMA must not @@ -786,7 +791,7 @@ struct vm_operations_struct { vm_fault_t (*huge_fault)(struct vm_fault *vmf, unsigned int order); vm_fault_t (*map_pages)(struct vm_fault *vmf, pgoff_t start_pgoff, pgoff_t end_pgoff); - unsigned long (*pagesize)(struct vm_area_struct * area); + unsigned long (*pagesize)(struct vm_area_struct *vma); /* notification that a previously read-only page is about to become * writable, if an error is returned it will cause a SIGBUS */ diff --git a/tools/testing/vma/include/dup.h b/tools/testing/vma/include/dup.h index 9eada1e0949c..8ae525ed1738 100644 --- a/tools/testing/vma/include/dup.h +++ b/tools/testing/vma/include/dup.h @@ -632,15 +632,20 @@ struct vm_area_struct { } __randomize_layout; struct vm_operations_struct { - void (*open)(struct vm_area_struct * area); + /** + * @open: Called when a VMA is remapped, split or forked. Not called + * upon first mapping a VMA. + * Context: User context. May sleep. Caller holds mmap_lock. + */ + void (*open)(struct vm_area_struct *vma); /** * @close: Called when the VMA is being removed from the MM. * Context: User context. May sleep. Caller holds mmap_lock. */ - void (*close)(struct vm_area_struct * area); + void (*close)(struct vm_area_struct *vma); /* Called any time before splitting to check if it's allowed */ - int (*may_split)(struct vm_area_struct *area, unsigned long addr); - int (*mremap)(struct vm_area_struct *area); + int (*may_split)(struct vm_area_struct *vma, unsigned long addr); + int (*mremap)(struct vm_area_struct *vma); /* * Called by mprotect() to make driver-specific permission * checks before mprotect() is finalised. The VMA must not @@ -652,7 +657,7 @@ struct vm_operations_struct { vm_fault_t (*huge_fault)(struct vm_fault *vmf, unsigned int order); vm_fault_t (*map_pages)(struct vm_fault *vmf, pgoff_t start_pgoff, pgoff_t end_pgoff); - unsigned long (*pagesize)(struct vm_area_struct * area); + unsigned long (*pagesize)(struct vm_area_struct *vma); /* notification that a previously read-only page is about to become * writable, if an error is returned it will cause a SIGBUS */ -- 2.53.0