linux-kernel - Re: [PATCH v6 05/10] iommu: Add iommu_copy_struct_from_full_user

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Message-ID: <20241031153319.GN10193@nvidia.com>
Date: Thu, 31 Oct 2024 12:33:19 -0300
From: Jason Gunthorpe <jgg@...dia.com>
To: Nicolin Chen <nicolinc@...dia.com>
Cc: kevin.tian@...el.com, corbet@....net, joro@...tes.org,
	suravee.suthikulpanit@....com, will@...nel.org,
	robin.murphy@....com, dwmw2@...radead.org, shuah@...nel.org,
	iommu@...ts.linux.dev, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
	baolu.lu@...ux.intel.com, eric.auger@...hat.com,
	jean-philippe@...aro.org, mdf@...nel.org, mshavit@...gle.com,
	shameerali.kolothum.thodi@...wei.com, smostafa@...gle.com,
	yi.l.liu@...el.com, aik@....com, zhangfei.gao@...aro.org,
	patches@...ts.linux.dev
Subject: Re: [PATCH v6 05/10] iommu: Add
 iommu_copy_struct_from_full_user_array helper

On Wed, Oct 30, 2024 at 02:35:31PM -0700, Nicolin Chen wrote:
> From: Jason Gunthorpe <jgg@...dia.com>
> 
> The iommu_copy_struct_from_user_array helper can be used to copy a single
> entry from a user array which might not be efficient if the array is big.
> 
> Add a new iommu_copy_struct_from_full_user_array to copy the entire user
> array at once. Update the existing iommu_copy_struct_from_user_array kdoc
> accordingly.
> 
> Signed-off-by: Jason Gunthorpe <jgg@...dia.com>
> Reviewed-by: Kevin Tian <kevin.tian@...el.com>
> Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
> ---
>  include/linux/iommu.h | 48 ++++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 47 insertions(+), 1 deletion(-)

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason