[Xen-changelog] [xen master] unmodified_drivers: make usbfront build conditional

[patchbot@xxxxxxx]

commit b2625bef58b66a012df2f759a1fb7ba50d139f7d
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Jan 23 10:29:12 2014 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Jan 23 10:29:12 2014 +0100

    unmodified_drivers: make usbfront build conditional
    
    Commit 0dcfb88fb8 ("unmodified_drivers: enable build of usbfront
    driver") results in the PV drivers to no longer build against older
    (pre-2.6.35) Linux versions. That's because usbfront.h includes
    headers from drivers/usb/core/, which is generally unavailable when
    building out-of-tree modules.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 unmodified_drivers/linux-2.6/usbfront/Kbuild |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/unmodified_drivers/linux-2.6/usbfront/Kbuild 
b/unmodified_drivers/linux-2.6/usbfront/Kbuild
index f44deaa..321a35a 100644
--- a/unmodified_drivers/linux-2.6/usbfront/Kbuild
+++ b/unmodified_drivers/linux-2.6/usbfront/Kbuild
@@ -1,5 +1,7 @@
 include $(M)/overrides.mk
 
-obj-m += xen-usb.o
+obj-m += $(if $(shell grep '^\#include "\.\./\.\./' $(obj)/usbfront.h), \
+             $(warning usbfront cannot be built), \
+             xen-usb.o)
 
 xen-usb-objs := usbfront-hcd.o xenbus.o
--
generated by git-patchbot for /home/xen/git/xen.git#master

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