[PATCH] don't require ebtables in the host kernel

[Avi Kivity <avi@qumranet.com>]

The network-bridge script fails when setting a few sysctls
which are only available if ebtables is present in the host
kernel. Fix by ignoring the return value of the sysctl command.

Signed-off-by: Avi Kivity <avi@qumranet.com>

Index: xen/tools/examples/network-bridge
===================================================================
--- xen/tools/examples/network-bridge	(revision 991)
+++ xen/tools/examples/network-bridge	(revision 992)
@@ -158,9 +158,9 @@
 
     # Don't create the bridge if it already exists.
     if ! brctl show | grep -q ${bridge} ; then
-	sysctl -w "net.bridge.bridge-nf-call-arptables=0"
-	sysctl -w "net.bridge.bridge-nf-call-ip6tables=0"
-	sysctl -w "net.bridge.bridge-nf-call-iptables=0"
+	! sysctl -w "net.bridge.bridge-nf-call-arptables=0"
+	! sysctl -w "net.bridge.bridge-nf-call-ip6tables=0"
+	! sysctl -w "net.bridge.bridge-nf-call-iptables=0"
 	brctl addbr ${bridge}
 	brctl stp ${bridge} off
 	brctl setfd ${bridge} 0


-- 
error compiling committee.c: too many arguments to function