From mboxrd@z Thu Jan 1 00:00:00 1970 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 723A9358370; Wed, 25 Mar 2026 10:04:50 +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=1774433090; cv=none; b=Dilj+FtrEyltS5pFqnZBf2Z4xyWz9j4CLhE5k/BFRudchWurlHGsr87rUIQfgRFa6DmQdg4QWKQok7/Su0qcTbpNLMLJ99EpbKUQ9ELgijDNha0ergz36S/Rg2l4zm6JDcl7iIq/us5aYW0XVPu2HGydaYEx8WR7/2TGVuFWh34= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774433090; c=relaxed/simple; bh=mWCjyaxKu+x+LzWRgLuhujGHLbxlc3MmkD51VDioSIg=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=P67p3kTqWfNFgs5M01peLcKAtDtXEE68DaI4RYtQwydV/EWGDZxJftcM3E6Kygn73OazKOqZkjxDJNTfOOWE5Hi1u8IhOHDLlTGqb1Q5pmFX7H/a8m7vkbMMTlkuCjKpRcLYF0hH0q/ZfdwtJnPR8ccDeUyHojoHy5SR24kyQik= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=TNJpNZcI; 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="TNJpNZcI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 99004C4CEF7; Wed, 25 Mar 2026 10:04:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774433090; bh=mWCjyaxKu+x+LzWRgLuhujGHLbxlc3MmkD51VDioSIg=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=TNJpNZcIC+RvxqTV15Sf9sni6H4IWM0T+i3wt5MLiMfUHkfT34q1CwGBusWH1kE3/ dnN4SNi4+AvIgkYt4oSgjYjdYCeFsI6VrGO5PEXoPnnlOc1fbEncDzZgNiPcjbFygA /ZtI085ad/dYBptuY3ARMNcg2KQletfHZ9gpOpculjQh5nP+N4E8Zr8dD6BGl/fyUR zafOK0794Im+0DBGvQliZGSK7JRyRUDI4tpM02JeU+gvdZP2ymlEdlBc6wgAXyOd0B aK/i0OiLd75T1xW0NaawDtJsRy0EK96sVVOg5mJbXC0sIeQ13cP6pms6xqicRCBsL8 W+CvXhvSGQluw== Message-ID: Date: Wed, 25 Mar 2026 11:04:39 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 12/21] misc: open-dice: replace deprecated mmap hook with mmap_prepare Content-Language: en-US To: "Lorenzo Stoakes (Oracle)" , 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" , 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 References: <5a83ab00195dc8d0609fa6cc525493010ac4ead1.1774045440.git.ljs@kernel.org> From: "Vlastimil Babka (SUSE)" In-Reply-To: <5a83ab00195dc8d0609fa6cc525493010ac4ead1.1774045440.git.ljs@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 3/20/26 23:39, Lorenzo Stoakes (Oracle) wrote: > The f_op->mmap interface is deprecated, so update driver to use its > successor, mmap_prepare. > > The driver previously used vm_iomap_memory(), so this change replaces it > with its mmap_prepare equivalent, mmap_action_simple_ioremap(). > > Reviewed-by: Suren Baghdasaryan > Signed-off-by: Lorenzo Stoakes (Oracle) Acked-by: Vlastimil Babka (SUSE) > --- > drivers/misc/open-dice.c | 19 +++++++++++-------- > 1 file changed, 11 insertions(+), 8 deletions(-) > > diff --git a/drivers/misc/open-dice.c b/drivers/misc/open-dice.c > index 24c29e0f00ef..45060fb4ea27 100644 > --- a/drivers/misc/open-dice.c > +++ b/drivers/misc/open-dice.c > @@ -86,29 +86,32 @@ static ssize_t open_dice_write(struct file *filp, const char __user *ptr, > /* > * Creates a mapping of the reserved memory region in user address space. > */ > -static int open_dice_mmap(struct file *filp, struct vm_area_struct *vma) > +static int open_dice_mmap_prepare(struct vm_area_desc *desc) > { > + struct file *filp = desc->file; > struct open_dice_drvdata *drvdata = to_open_dice_drvdata(filp); > > - if (vma->vm_flags & VM_MAYSHARE) { > + if (vma_desc_test(desc, VMA_MAYSHARE_BIT)) { > /* Do not allow userspace to modify the underlying data. */ > - if (vma->vm_flags & VM_WRITE) > + if (vma_desc_test(desc, VMA_WRITE_BIT)) > return -EPERM; > /* Ensure userspace cannot acquire VM_WRITE later. */ > - vm_flags_clear(vma, VM_MAYWRITE); > + vma_desc_clear_flags(desc, VMA_MAYWRITE_BIT); > } > > /* Create write-combine mapping so all clients observe a wipe. */ > - vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot); > - vm_flags_set(vma, VM_DONTCOPY | VM_DONTDUMP); > - return vm_iomap_memory(vma, drvdata->rmem->base, drvdata->rmem->size); > + desc->page_prot = pgprot_writecombine(desc->page_prot); > + vma_desc_set_flags(desc, VMA_DONTCOPY_BIT, VMA_DONTDUMP_BIT); > + mmap_action_simple_ioremap(desc, drvdata->rmem->base, > + drvdata->rmem->size); > + return 0; > } > > static const struct file_operations open_dice_fops = { > .owner = THIS_MODULE, > .read = open_dice_read, > .write = open_dice_write, > - .mmap = open_dice_mmap, > + .mmap_prepare = open_dice_mmap_prepare, > }; > > static int __init open_dice_probe(struct platform_device *pdev)