From nobody Tue Apr 7 04:19:57 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 81925364920; Mon, 16 Mar 2026 21:13:46 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773695626; cv=none; b=Bv0LIzHrD4qqegOfmazeJ040a/8V2jqmxEMU/aeQACw1hEkXcNtKNKFxGg9ptakPSopCGovB2HcyTWIGtwMViumJQ5FpUTxbqJwypboX08O3c49O6oRn49psS7xryICCt2iH8RdIRX81G7xLRePXV6V/ugWM/gCpr+D9vHoubJk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773695626; c=relaxed/simple; bh=ZYlwd7PUB52+Aa0tSM/x3ehotacgsAAPggxfy3ZY/yw=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ltyxVmEB32WyrL4Vn9Bxfa14reAPpUKYjRQXTyYJekDK25axcrgMiCLX6CCqWLooxo2s0LBnbcGuFwdDgDcw4ADn1nd1E7KZx5xp6fz6aDAQS4GtOraCreCA7Y3fIB5ZXY8Zoc9VhW2Inu1HCSNheU9cEDD21YrLY6fIfdGChbk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=lWJusVF2; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="lWJusVF2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 45D81C2BCB0; Mon, 16 Mar 2026 21:13:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773695625; bh=ZYlwd7PUB52+Aa0tSM/x3ehotacgsAAPggxfy3ZY/yw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=lWJusVF2FYj6O20AjF69vHaZdlhTuW/FCX7sLY2J2xLq8x+plZOOruT+CF4eJYvzv XjSYmPaEbveXWlez2yANSk5agjSZYes0IACOfpPEvuka5JegNzPZR0+OMZhsKdk2ot 0gTOgqPvBh17kkIac26c62pBaxMWDHJSOQ13DBcMm9h7Rcu1PBf31yVwHlyeTE01qO qo1+4JBJvqmYyOvv1Djssoj3ko/LzbF5GbbJBGE7xGsguAdY/Y8V0TWdDHhMzwYRMj my3q8mKn7Euc6QuFg7LNDQwpx7TcZ+q1HLSrruWE9RD2Z0nOIKQG4cYZDA7Ee1dXZH ql6we8wIwi+qQ== From: "Lorenzo Stoakes (Oracle)" To: Andrew Morton Cc: Jonathan Corbet , Clemens Ladisch , Arnd Bergmann , Greg Kroah-Hartman , "K . 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 v2 03/16] mm: document vm_operations_struct->open the same as close() Date: Mon, 16 Mar 2026 21:11:59 +0000 Message-ID: <3cec125f9eaf9dc44e638a56c76d12c58684af87.1773695307.git.ljs@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" 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 | 5 +++++ 2 files changed, 15 insertions(+), 5 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); =20 /* 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/du= p.h index 9eada1e0949c..ccf1f061c65a 100644 --- a/tools/testing/vma/include/dup.h +++ b/tools/testing/vma/include/dup.h @@ -632,6 +632,11 @@ struct vm_area_struct { } __randomize_layout; =20 struct vm_operations_struct { + /** + * @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 * area); /** * @close: Called when the VMA is being removed from the MM. --=20 2.53.0