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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 64939F53D9E for ; Mon, 16 Mar 2026 21:13:49 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CB8326B0382; Mon, 16 Mar 2026 17:13:48 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C580B6B0384; Mon, 16 Mar 2026 17:13:48 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B5BC06B0385; Mon, 16 Mar 2026 17:13:48 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0015.hostedemail.com [216.40.44.15]) by kanga.kvack.org (Postfix) with ESMTP id A2CC56B0382 for ; Mon, 16 Mar 2026 17:13:48 -0400 (EDT) Received: from smtpin11.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 59799160613 for ; Mon, 16 Mar 2026 21:13:48 +0000 (UTC) X-FDA: 84553178136.11.1B8C5A4 Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf15.hostedemail.com (Postfix) with ESMTP id A8EBCA0019 for ; Mon, 16 Mar 2026 21:13:46 +0000 (UTC) Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=lWJusVF2; spf=pass (imf15.hostedemail.com: domain of ljs@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=ljs@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1773695626; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=SUvO/OOUd9UySLDHj25on1dt+aaoauDmqJv//S9HN5Y=; b=Sj/Vs7AN2ekIZ4ZsJ36poIe689cSv+VeBVXz3zA5Zo/Sf4h+TnkVPegwxuJYXELvQhxT6/ MWCNA9W3IOwSzHDhKyyqrpClwnQdv+zJlGxlBOOFeSI7JXL2zORYt5em7wu2VhMEQkGax4 2CYOP0AdGTH4LAgL7cYv+XqNGZHLhCs= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1773695626; a=rsa-sha256; cv=none; b=cBSaxFazVdJ9Uk/WgaZ3lpa6jo5WdLdedXs1Q42S82Jeg7+ogwaA7ahfOfex8XpYeFHfyX O9u/X4caJcQRU8vPZqUUPfcXL1N+wNodmJK5iFmcexHZ/Jm/yLxAkZuoTucL/OeaU9Kt03 68ZH5Bs7YHeAcOUhE6awE3pSoMyymJM= ARC-Authentication-Results: i=1; imf15.hostedemail.com; dkim=pass header.d=kernel.org header.s=k20201202 header.b=lWJusVF2; spf=pass (imf15.hostedemail.com: domain of ljs@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=ljs@kernel.org; dmarc=pass (policy=quarantine) header.from=kernel.org Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 1804F6132F; Mon, 16 Mar 2026 21:13:46 +0000 (UTC) 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: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: A8EBCA0019 X-Stat-Signature: 61fyzzgr4a8n1rphprac6jheu9m745im X-Rspam-User: X-HE-Tag: 1773695626-397796 X-HE-Meta: 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 IrvegpP/ VTbSJBw5gTOd002d2JBv7yzW2YFEcFvPme+358QM9tzQuRbosMHBZdGB/QJNAgjOlm0yI4QxfGYz22Di6zEiak2o/55ndDuZXaAZJVYIwUmK5MTgOzw1QL2IK+P8z4D2jYkdGcJrZjq73tm3/duudY/BgqktQyNeKf8mR9xrgXXrfbtK5NY9I4VrP2MeCWiauvBBFCenoq83DYnZGRqoC249al7cLxa44vFhnosArzNdgvsKt/p5FRfQAbqlaFASvoA0xVVROQWMXuEWA0UqDzaT4o1WPVWLrJfH8z+sUPczqKMDIwiYHI4CvS5HaQJ3NvCMgSAmi2lAZ60qHcqN+tdSUBhGnWsCLWwym 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 | 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); /* 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..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; 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. -- 2.53.0