config: select BLK_DEV_NBD as module

Enable BLK_DEV_NBD as module to allow computer to be a client for
network block devices, i.e. it will be able to use block devices
exported by servers (mount file systems on them etc.). Communication
between client and server works over TCP/IP networking, but to the
client program this is hidden: it looks like a regular local file access
to a block device special file such as /dev/nd0.

Network block devices also allows you to run a block-device in userland
(making server and client physically the same computer, communicating
using the loopback network device).

Module will be called nbd.

Signed-off-by: Kelsey Steele <kelseysteele@microsoft.com>

Author: kelsey-steele

arch/arm64/configs/config-wsl-arm64

@@ -1674,7 +1674,7 @@ CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_LOOP_MIN_COUNT=8
 # CONFIG_BLK_DEV_CRYPTOLOOP is not set
 # CONFIG_BLK_DEV_DRBD is not set
-# CONFIG_BLK_DEV_NBD is not set
+CONFIG_BLK_DEV_NBD=m
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_COUNT=16
 CONFIG_BLK_DEV_RAM_SIZE=65536

arch/x86/configs/config-wsl

@@ -1685,7 +1685,7 @@ CONFIG_BLK_DEV_LOOP=y
 CONFIG_BLK_DEV_LOOP_MIN_COUNT=8
 # CONFIG_BLK_DEV_CRYPTOLOOP is not set
 # CONFIG_BLK_DEV_DRBD is not set
-# CONFIG_BLK_DEV_NBD is not set
+CONFIG_BLK_DEV_NBD=m
 CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_COUNT=16
 CONFIG_BLK_DEV_RAM_SIZE=65536