Re: [PATCH v3 0/6] Remove driver dependencies on ib_uverbs.ko

[Jason Gunthorpe <jgg@nvidia.com>]

On Mon, May 25, 2026 at 10:22:36PM -0300, Jason Gunthorpe wrote:
> The original design was for user facing modules like ib_uverbs to be
> independently loadable, if the user didn't want to have those char devs
> then they could block the module.
> 
> This has slowly gotten degraded over time and right now every driver is
> depending on ib_uverbs.ko. Fixup everything except
> rdma_user_mmap_disassociate() in hns by moving code around and adding a
> new module ib_uverbs_support.ko to hold the driver functions without any
> of the uverbs cdev code.
> 
> After this series mlx5_ib and bnxt_re will use ib_uverbs_support.ko.
> 
> v3:
>   - Handle core=y uverbs=m cases using a new kconfig
>   - Remove doubled rdma_user_mmap_disassociate() inline
>   - Add missing _exit
> v2: https://patch.msgid.link/r/0-v2-4a21959414f2+3d7-ib_uverbs_support_ko_jgg@nvidia.com
>   - Rebase on the rc branch
>   - Fix ucaps module mistakes
>   - Add a patch to not build ib_core_uverbs.o without
>     CONFIG_INFINIBAND_USER_ACCESS
> v1: https://patch.msgid.link/r/0-v1-045258567bd6+9fe-ib_uverbs_support_ko_jgg@nvidia.com
> 
> Jason Gunthorpe (6):
>   RDMA/core: Do not compile ib_core_uverbs without USER_ACCESS
>   RDMA/core: Move many of the little EXPORTs from uverbs_ioctl into
>     ib_core_uverbs
>   RDMA/core: Remove uverbs_async_event_release()
>   RDMA/core: Make a new module for the uverbs components needed by
>     drivers
>   RDMA/core: Move ucaps into ib_uverbs_support.ko
>   RDMA/core: Move flow related functions to ib_uverbs_support.ko

Applied to for-next, I fixed the two new minor Sashiko remarks about a stale
comment and a READ_ONCE in uverbs_uobject_fd_release().

Jason