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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 v4 03/21] mm: document vm_operations_struct->open the same as close() Date: Fri, 20 Mar 2026 22:39:29 +0000 Message-ID: <7d0ca833c12014320f0fa00f816f95e6e10076f2.1774045440.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-Stat-Signature: 1p4by98otgb8bsmkfd18n4z4er959cqf X-Rspamd-Queue-Id: 065A3C0005 X-Rspamd-Server: rspam03 X-HE-Tag: 1774046415-396988 X-HE-Meta: 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 LUoNuHq/ KpSD782Lnwni8idTrzAyrUDliS4himO5g4u08nNsm7mmTj/1nodZuwbh1K1+7BwCsyhjJvLRDxEn8nUl9Co/w+SFBUQQUmljUeP6OgaLGLl0EHpNen3MIi2AuGDAYM+NKCZHeFv22Yj5/k02kGwgwi6mDfSuF+MTLuqXPCH2/i61DZ/LubQb/Tv2ky/9JEq1cZLNx3BOdXV6b9iTGEQjOhuNxnljsHF8dvNnIb8XyKLNvU2Xs6tGM5JIUt2Sf+hx/XZxzYXs2sC6+TF4seIdag6nfPu7OhqnufWvfFjXTQnrD7CSED28ze3N7u5AsWoWCRR2hAt5QNonBUcV1ueg7E5vPoocsqhRXIHQJ 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 While we're here, update all outdated references to an 'area' field for VMAs to the more consistent 'vma'. Acked-by: Vlastimil Babka (SUSE) 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 477a5be65dd2..26c6c3255a94 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