[PATCH] mshv: add vmbus dependency

[Arnd Bergmann]

From: Arnd Bergmann <arnd@xxxxxxxx>

When the vmbus driver is not part of the kernel, the mvhv_root
driver now fails to link:

ERROR: modpost: "hv_vmbus_exists" [drivers/hv/mshv_root.ko] undefined!

Avoid this by adding an explicit Kconfig dependency. Note that
stubbing out the hv_vmbus_exists() based on configuration would
also work for some cases, but not with MSHV_ROOT=y and HYPERV_VMBUS=m.

Fixes: f1a9e67c1138 ("mshv: limit SynIC management to MSHV-owned resources")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
 drivers/hv/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
index 52af086fdeb2..21193b571a80 100644
--- a/drivers/hv/Kconfig
+++ b/drivers/hv/Kconfig
@@ -75,6 +75,7 @@ config MSHV_ROOT
 	# e.g. When withdrawing memory, the hypervisor gives back 4k pages in
 	# no particular order, making it impossible to reassemble larger pages
 	depends on PAGE_SIZE_4KB
+	depends on HYPERV_VMBUS
 	select EVENTFD
 	select VIRT_XFER_TO_GUEST_WORK
 	select HMM_MIRROR
-- 
2.39.5