From: Jason Gunthorpe <jgg@ziepe.ca>
To: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: Kevin Tian <kevin.tian@intel.com>, Joerg Roedel <joro@8bytes.org>,
Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org,
iommu@lists.linux.dev
Subject: Re: [PATCH] iommufd: Constify struct dma_buf_attach_ops
Date: Mon, 2 Mar 2026 20:25:47 -0400 [thread overview]
Message-ID: <20260303002547.GB964116@ziepe.ca> (raw)
In-Reply-To: <67e9126bbffa1d5c05124773a8dd4a3493be77ac.1772139886.git.christophe.jaillet@wanadoo.fr>
On Thu, Feb 26, 2026 at 10:05:21PM +0100, Christophe JAILLET wrote:
> 'struct dma_buf_attach_ops' is not modified in this driver.
>
> Constifying this structure moves some data to a read-only section, so
> increases overall security, especially when the structure holds some
> function pointers.
>
> On a x86_64, with allmodconfig:
> Before:
> ======
> text data bss dec hex filename
> 81096 13899 192 95187 173d3 drivers/iommu/iommufd/pages.o
>
> After:
> =====
> text data bss dec hex filename
> 81160 13835 192 95187 173d3 drivers/iommu/iommufd/pages.o
>
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> Compile tested only.
> ---
> drivers/iommu/iommufd/pages.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Applied thanks
Jason
prev parent reply other threads:[~2026-03-03 0:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-26 21:05 [PATCH] iommufd: Constify struct dma_buf_attach_ops Christophe JAILLET
2026-03-03 0:25 ` Jason Gunthorpe [this message]
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