From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 650811099B4D for ; Fri, 20 Mar 2026 22:40:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=oX/9l7GBuPvJMchf5XKThVYHe+i8ZfivN6ck87129sE=; b=2Myc9dKJzTf8ySgu34D17W6Qcx t2YCiQczPPa7wAH37H/y+b+nX3vPDZNx/yd/IbSTNHmbV0GJVFujNd2arJ69pjiTv+W3FVgduFmsf KIoyhaz2FVMHi+EgX0U2x2Wk5VOYS9RnxidYGujPPKGNoz8cMgwMAFNLinvVswVyUEsAFmuAzIJRi Y0h1CrPk2zX/B4Qpxxp27DCQ9moacRxPV8wmxxnT88HHyELKmQ4XG5jb0u2P/U1R5+kLfDtIIq2Ml kNYfBQqovHZtzhltU6ZUBJAt/w/3Syjmt/DuG9xAzJZGn3t6sXjqHCpgy4et4Idtv5l+9r9QaJoSC n3KQ82qw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w3iVy-0000000DiWM-0OjM; Fri, 20 Mar 2026 22:40:22 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1w3iVr-0000000DiQU-3OiS; Fri, 20 Mar 2026 22:40:16 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 0A6934454F; Fri, 20 Mar 2026 22:40:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 40016C2BC87; Fri, 20 Mar 2026 22:40:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774046414; bh=KGyUqER+1KMemEPNwb05yxF1iWQpDSjowRQtc3QKLCs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=dA9XZnpBcEJcM42a6vjSFyPET/ma7T86PWJqOQGw7Jyg+kRd+83nlRoqc0O7v96SK YvRsSOeFduElA2i9LlLPBrveszNKsV/wEHNPDsjTRuTRE3cLy3G5NskTN8/H53cVFn 3Ywq6aUqH5SvMgIF0ep7yj4Snw0UswftBXcYfPQrdKctrim6TYzDgn/Qtd4p5XDqAn ksYAYdoClblLQQ4HNNMt+rmiwkQjH309dGenzWTjBN0noIg1HDWbSeRrCCp0QY7i1+ Q3/R3MYNQe23Nn9QayxJ05lxx2gjnsKg3UDM1l+cacq1VVEFTuAkz0zBxU0O822v1t h+KOY6lq/0WEQ== 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 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-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260320_154015_890780_8129EE78 X-CRM114-Status: GOOD ( 12.78 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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