From nobody Tue Apr 7 16:13:24 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 53BB638C2AB; Thu, 12 Mar 2026 20:27:56 +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=1773347276; cv=none; b=D71LUD/yEzbWNt7Z2dMEXdSeyjnTcbBmXcKwoX/mBwbCQeN9lT7u3os1La3Vj31m/+oVT3oiYtWh2CDlH6jo8wvRkewt1kBp3V2XkYp/fTpyzQXOLkz0u6hR0viweJkSpXaCA2yaEtwa9Jd6uPx5rDSE6xYLlnx3YTCPsvAPndA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773347276; c=relaxed/simple; bh=i54y1Tun/I2Qyiaxccl3VCrf2xJ8vhDj89GLGQXebTc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=pDIP+DEnZY6Rzd9ZUUtFHUZH/3SnePDXyX9/F31Mbe3PV/HrmitXfsWdKMWPhmJBVDbgSfFlPDjeYh5g/x6eZ5INxMp799Ki3r6W3OAON0mGV592htJ5J7o5OiYJFrx30niWhjWsj2m9FgXsjTv5Bkrmuk5avQExxYCECY2ql+o= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=XsS71PUH; 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="XsS71PUH" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 98623C19425; Thu, 12 Mar 2026 20:27:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773347276; bh=i54y1Tun/I2Qyiaxccl3VCrf2xJ8vhDj89GLGQXebTc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XsS71PUHhRME0/Uaazil3ddVQ6x1Nb+tS7PiTgEVD3BJWwzqK8TUuX/9qhmUpPZrw Lg4mKIQkhpz4fU4hbDMTO9EUrAQT4wlbcLoCZKdOcCz+NZfjl8Q+mOJ+dIvGxVyjeu ZS2is9c15J1TzVd2xFPIwYoozs+M9rRtHBaugZoVSZxArBJOvWnx8P1BE7Qyzx+NPC d+nTISxjbSWvliCR1dzZZaWzKZ98G6sVj1YraiW2aZeukEi5vBTj0TkAo5/yilEylN 4qu8Q9EjngqPWWnJPTITewHgtWG6cFZT4G6UhH8g4Litr+0pJtyuOinB8M16lsR4oN HvVHEGxDVmvjg== 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 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: 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 ++++++++++----- 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); =20 /* notification that a previously read-only page is about to become * writable, if an error is returned it will cause a SIGBUS */ --=20 2.53.0