Re: [PATCH] RDMA/uverbs: select CONFIG_DMA_SHARED_BUFFER

[Leon Romanovsky <leon@kernel.org>]

On Mon, Feb 16, 2026 at 01:12:00PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@arndb.de>
> 
> The addition of dmabuf support in uverbs means that it is no
> longer possible to build infiniband support if that is disabled:
> 
> arm-linux-gnueabi-ld: drivers/infiniband/core/ib_core_uverbs.o: in function `rdma_user_mmap_entry_remove.part.0':
> ib_core_uverbs.c:(.text+0x508): undefined reference to `dma_buf_move_notify'
> (dma_buf_move_notify): Unknown destination type (ARM/Thumb) in drivers/infiniband/core/ib_core_uverbs.o
> ib_core_uverbs.c:(.text+0x518): undefined reference to `dma_resv_wait_timeout'
> (dma_resv_wait_timeout): Unknown destination type (ARM/Thumb) in drivers/infiniband/core/ib_core_uverbs.o
> 
> Select this from Kconfig, as we do for the other users.
> 
> Fixes: 0ac6f4056c4a ("RDMA/uverbs: Add DMABUF object type and operations")
> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
> ---
>  drivers/infiniband/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 

It looks reasonable to me. dma-buf is becoming a first‑class citizen in the
RDMA world.

Thanks,
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>