Re: [PATCH 1/1] io_uring/zcrx: fix builds without dmabuf

[Alexey Charkov <alchark@gmail.com>]

On Tue, May 6, 2025 at 8:07 PM Pavel Begunkov <asml.silence@gmail.com> wrote:
>
> armv7a-unknown-linux-gnueabihf-ld: io_uring/zcrx.o: in function
> `io_release_dmabuf':
> zcrx.c:(.text+0x1c): undefined reference to `dma_buf_unmap_attachment_unlocked'
> armv7a-unknown-linux-gnueabihf-ld: zcrx.c:(.text+0x30): undefined
> reference to `dma_buf_detach'
> armv7a-unknown-linux-gnueabihf-ld: zcrx.c:(.text+0x40): undefined
> reference to `dma_buf_put'
> armv7a-unknown-linux-gnueabihf-ld: io_uring/zcrx.o: in function
> `io_register_zcrx_ifq':
> zcrx.c:(.text+0x15cc): undefined reference to `dma_buf_get'
> armv7a-unknown-linux-gnueabihf-ld: zcrx.c:(.text+0x15e8): undefined
> reference to `dma_buf_attach'
> armv7a-unknown-linux-gnueabihf-ld: zcrx.c:(.text+0x1604): undefined
> reference to `dma_buf_map_attachment_unlocked'
> make[2]: *** [scripts/Makefile.vmlinux:91: vmlinux] Error 1
> make[1]: *** [/home/alchark/linux/Makefile:1242: vmlinux] Error 2
> make: *** [Makefile:248: __sub-make] Error 2
>
> There are no definitions for dma-buf functions without
> CONFIG_DMA_SHARED_BUFFER, make sure we don't try to link to them
> if dma-bufs are not enabled.
>
> Reported-by: Alexey Charkov <alchark@gmail.com>
> Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
> ---
>  io_uring/zcrx.c | 8 ++++++++
>  1 file changed, 8 insertions(+)

Just wanted to confirm that this fixes the build in my setup, thanks a
lot Pavel!

Best regards,
Alexey