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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 03/15] mm: document vm_operations_struct->open the same as close() Date: Thu, 12 Mar 2026 20:27:18 +0000 Message-ID: <52a7b9a003ea51521ab3c0baf30337a7800a3af7.1773346620.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-Rspamd-Queue-Id: F2C7B180005 X-Stat-Signature: gxsmq7eoug71ngmrmb61o7to3qkxurt1 X-Rspam-User: X-Rspamd-Server: rspam05 X-HE-Tag: 1773347276-281150 X-HE-Meta: U2FsdGVkX1/wQqMx449mkqpOPJd1gl4mEw9k2Qgx/LxMMZFGjlPzNMqvq9jh9eu9QA/1jTjTAXaBJ+Jy/WyXQTk8ZedPL75YPs5KZ+7ZaDujirhb4vKjZHUamRaS4GDpsz1P5b+PsHRaFm9q7Nh3YC/dZv+w62g74cMmQ52TIp6RCC5glfkzuH1ntWryJUNO47edF5NKxw/SYCRP1EpRUPUlH7tQeg3KvGdtXvxba8FmUv2yVl2mlbuWe3SzGy7ca6fY81fyfpQEkfRoJO7W1t5X8+P4v/dvs5TRN1iZTwUmTWdwRUm/24U87NvkbY/Q5AHQKHkq1u6rwaDO95IuUeeEbtO3HLq9CFNRBRlOfZLKuni8pfYct5/XKLJkvonZ+zUrW+WXQeMEyYghIl4mgQAP6qSo24EEbS5kNJbLeFvRonnEPCwWF8GnYCiAqwFSljJAAmF7/fwDbPWgXgSPCH+ehVNC66ov+XxEnkHBiUiOX0dZ3sWLmT6/+Iia5voOyj3WDuP9WvcOh5+GexL6pZDAkdxHaiq4lVY/gTqYbGhOtFgpCej27cEyuMRkRfvNNPHI4OvmQksyzkEhlmtE6XJyokcUu2CVXDvYLT/rudmIIrgrVf7xxoMdLgqeXqJujKtlFXfSV9HDIKa1X1vLY0/1Zll6x5DLbUFWPF5qq6wc1K/5zOA1FhjTWPLmG5EKH5dPFcC7/mH3ubGUJn9fNDQKMScwVQgUiinVYzMM7J9PDN6gKrgP9hfxd/lz9kibxZfFrkqORfdXahYPvfb1egfkPK1mgCW97HENRD7L7eeichkHdzMQcy3GeE/ZyOhHBOQ31VpTPtWQtBWyzgqTbXRZ+HESMuFU7vp7d2T12hoNMj/RbaVe5L9DJHw5th4AZTGDzc2v5dfT/vfoNp0bdn7I8n5EExkMOIRzDJFXevL6JLe1oJoCq8BqNqcgbCA4sF53AFooo80JV5w+Kbz ylrVrRNq NgKyfCWXdLO8P8LO3SSd8CVxFnIa9x0Wb3hNbU7jWYyvqcCaGaBzkfBjbrRmtTLRmFNhavUsazUEjsKLpDpdKU7t7Z6aFOTrzY5fDd6uniFKWJQmsd92FJJ6rcUIpFGBy+YXUoS8Bteq0hj75n9pRvAGNugoQaUntGK8FNmtuXOOw/Atmnb4epfFE0vmd9g9IHpoiKz3sOAFhcSIG7Flz9P2pMYu1jJ3Gl4MGLIJJDpOFNgNFOeRoHVrDkDYPN34rBrkoSrqkpZp9ebVuI4X+a7zyEyqY9ptSLSx0gIyAn8RzNrML6Qod9OaL+w== 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 ++++++++++----- 1 file changed, 10 insertions(+), 5 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index cc5960a84382..12a0b4c63736 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -748,15 +748,20 @@ 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 or split. 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 @@ -768,7 +773,7 @@ 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