On Wed, Oct 27, 2021 at 10:24:13AM +0200, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@xxxxxxxx>
>
> Switching virtio-blk to the sg_pool interfaces causes a build
> failures when they are not part of the kernel:
>
> drivers/block/virtio_blk.c:182:3: error: implicit declaration of function 'sg_free_table_chained' [-Werror,-Wimplicit-function-declaration]
> sg_free_table_chained(&vbr->sg_table,
> ^
> drivers/block/virtio_blk.c:195:8: error: implicit declaration of function 'sg_alloc_table_chained' [-Werror,-Wimplicit-function-declaration]
> err = sg_alloc_table_chained(&vbr->sg_table,
> ^
>
> Select this symbol through Kconfig, as is done for all other
> users.
>
> Fixes: b2c5221fd074 ("virtio-blk: avoid preallocating big SGL for data")
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
I'll squash this to avoid bisect failures, ok?
> ---
> drivers/block/Kconfig | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
> index d97eaf6adb6d..2a51dfb09c8f 100644
> --- a/drivers/block/Kconfig
> +++ b/drivers/block/Kconfig
> @@ -371,6 +371,7 @@ config XEN_BLKDEV_BACKEND
> config VIRTIO_BLK
> tristate "Virtio block driver"
> depends on VIRTIO
> + select SG_POOL
> help
> This is the virtual block driver for virtio. It can be used with
> QEMU based VMMs (like KVM or Xen). Say Y or M.
> --
> 2.29.2
