virtio: add help to CONFIG_VIRTIO option.
Trying to enable a virtio driver (eg CONFIG_VIRTIO_BLK) is painful
because it depends on CONFIG_VIRTIO. CONFIG_VIRTIO doesn't tell you
how to turn it on (it's selected from anything which provides a virtio
bus).
This patch at least adds some documentation, visible in menuconfig, as
a hint.
Reported-by: Kent Overstreet <koverstreet@google.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/drivers/virtio/Kconfig b/drivers/virtio/Kconfig
index 8e04851..eabc2a0 100644
--- a/drivers/virtio/Kconfig
+++ b/drivers/virtio/Kconfig
@@ -1,8 +1,10 @@
-# Virtio always gets selected by whoever wants it.
config VIRTIO
tristate
+ ---help---
+ This option is selected by any driver which implements the virtio
+ bus, such as CONFIG_VIRTIO_PCI, CONFIG_VIRTIO_MMIO, CONFIG_LGUEST,
+ CONFIG_RPMSG or CONFIG_S390_GUEST.
-# Similarly the virtio ring implementation.
config VIRTIO_RING
tristate
depends on VIRTIO