[Qemu-devel] [PATCH] fsdev: fix compilation with VIRTIO but not VIRTIO_9P

[Paolo Bonzini <pbonzini@redhat.com>]

hw/9pfs/Makefile.objs uses CONFIG_VIRTIO_9P to guard the definition for
FileOperations structs, while fsdev/Makefile.objs uses CONFIG_VIRTIO
to guard the use.  Mismatch causes linking to fail when CONFIG_VIRTIO
is set but CONFIG_VIRTIO_9P is not.

Fix it and use if/else to clarify that the two lines are for opposite
conditions.

Reported-by: Peter Maydell <peter.maydell@linaro.org>
Fixes: b5dfdb082fc350f3e68dfa61dc988d97cad28cfe
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 fsdev/Makefile.objs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/fsdev/Makefile.objs b/fsdev/Makefile.objs
index fb38017c0b..24bbb3e75c 100644
--- a/fsdev/Makefile.objs
+++ b/fsdev/Makefile.objs
@@ -1,7 +1,10 @@
 # Lots of the fsdev/9pcode is pulled in by vl.c via qemu_fsdev_add.
 # only pull in the actual 9p backend if we also enabled virtio or xen.
-common-obj-$(call land,$(CONFIG_VIRTFS),$(call lor,$(CONFIG_VIRTIO),$(CONFIG_XEN))) = qemu-fsdev.o 9p-marshal.o 9p-iov-marshal.o
-common-obj-$(call lnot,$(call land,$(CONFIG_VIRTFS),$(call lor,$(CONFIG_VIRTIO),$(CONFIG_XEN)))) = qemu-fsdev-dummy.o
+ifeq ($(call land,$(CONFIG_VIRTFS),$(call lor,$(CONFIG_VIRTIO_9P),$(CONFIG_XEN))),y)
+common-obj-y = qemu-fsdev.o 9p-marshal.o 9p-iov-marshal.o
+else
+common-obj-y = qemu-fsdev-dummy.o
+endif
 common-obj-y += qemu-fsdev-opts.o qemu-fsdev-throttle.o
 
 # Toplevel always builds this; targets without virtio will put it in
-- 
2.17.1