cm-x270.conf: allow user to override kernel version

diff --git a/conf/machine/cm-x270.conf b/conf/machine/cm-x270.conf
index 2522897..1b61887 100644 (file)
--- a/conf/machine/cm-x270.conf
+++ b/conf/machine/cm-x270.conf
@@ -6,7 +6,7 @@ TARGET_ARCH = "arm"
 GUI_MACHINE_CLASS ?= "bigscreen"
 
 PREFERRED_PROVIDER_virtual/kernel = "linux"
-PREFERRED_VERSION_linux = "2.6.23"
+PREFERRED_VERSION_linux ?= "2.6.23"
 
 PACKAGE_EXTRA_ARCHS = "armv4 armv4t armv5te iwmmxt"